# Prop-Maker Feather Talking Adabot Clock
## Overview
Not sure what time it is? Never quite got the hang of reading an analog clock? Ask Adabot! In this project, you'll use an RP2040 Prop-Maker Feather running CircuitPython with a DS3231 real-time clock breakout to build a friendly, talking clock. Whenever you press the button on the top of Adabot's head, he will announce the current time for you.
https://youtube.com/shorts/ejIOZng-BmY
Adabot's head is a remix of...Adabot's head from the [Adabot Toy Robot Friend](https://learn.adafruit.com/adabot-rp2040) project. To accommodate the clock electronics, Adabot's head was lengthened and a few mounting holes were added.
## Adabot Clock: The Remix
If this project sounds familiar, that's because it's a remake of the fantastic [Wave Shield Talking Clock project by Phil B](https://learn.adafruit.com/wave-shield-talking-clock). That build was coded with Arduino and used the Wave Shield attached to an Arduino Uno. With the release of the RP2040 Prop-Maker Feather, it felt like a great time to revisit this idea.
## Parts
### Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier
[Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier](https://www.adafruit.com/product/5768)
The Adafruit Feather series gives you lots of options for a small, portable, rechargeable microcontroller board. By picking a feather and stacking on a FeatherWing you can create advanced projects quickly. One popular combo is our [Feather M4](https://www.adafruit.com/product/3857)...
In Stock
[Buy Now](https://www.adafruit.com/product/5768)
[Related Guides to the Product](https://learn.adafruit.com/products/5768/guides)
### Adafruit DS3231 Precision RTC - STEMMA QT
[Adafruit DS3231 Precision RTC - STEMMA QT](https://www.adafruit.com/product/5188)
The datasheet for the **DS3231** explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". And, hey, it does exactly what it says on the tin! This **Real Time Clock (RTC)** is the most precise you can get in a...
In Stock
[Buy Now](https://www.adafruit.com/product/5188)
[Related Guides to the Product](https://learn.adafruit.com/products/5188/guides)
### NeoPixel Stick - 8 x 5050 RGB LED with Integrated Drivers
[NeoPixel Stick - 8 x 5050 RGB LED with Integrated Drivers](https://www.adafruit.com/product/1426)
Make your own little LED strip arrangement with this stick of NeoPixel LEDs. We crammed 8 of the tiny 5050 (5mm x 5mm) smart RGB LEDs onto a PCB with mounting holes and a chainable design. Use only one microcontroller pin to control as many as you can chain together! Each LED is addressable as...
In Stock
[Buy Now](https://www.adafruit.com/product/1426)
[Related Guides to the Product](https://learn.adafruit.com/products/1426/guides)
### 16mm Panel Mount Momentary Pushbutton - Black
[16mm Panel Mount Momentary Pushbutton - Black](https://www.adafruit.com/product/1505)
OK, this item is pretty simple - it's a panel mount pushbutton. It's not that exciting, no LEDs, no bells & whistles. But we really like it anyways – look at that lovely rounded shape, that elegant bevel. If you're going to go with a momentary pushbutton, let it be this...
In Stock
[Buy Now](https://www.adafruit.com/product/1505)
[Related Guides to the Product](https://learn.adafruit.com/products/1505/guides)
### Mini Oval Speaker - 8 Ohm 1 Watt
[Mini Oval Speaker - 8 Ohm 1 Watt](https://www.adafruit.com/product/3923)
Hear the good news! This wee speaker is a great addition to any audio project where you need 8 ohm impedance and 1W or less of power. We particularly like this speaker as it is small and comes with nice skinny wires with a connector on the end. It has a handy...
In Stock
[Buy Now](https://www.adafruit.com/product/3923)
[Related Guides to the Product](https://learn.adafruit.com/products/3923/guides)
### STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long
[STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long](https://www.adafruit.com/product/4210)
This 4-wire cable is a little over 100mm / 4" long and fitted with JST-SH female 4-pin connectors on both ends. Compared with the chunkier JST-PH these are 1mm pitch instead of 2mm, but still have a nice latching feel, while being easy to insert and remove.
In Stock
[Buy Now](https://www.adafruit.com/product/4210)
[Related Guides to the Product](https://learn.adafruit.com/products/4210/guides)
### Part: USB A to USB C Cable
quantity: 1
1 meter
[USB A to USB C Cable](https://www.adafruit.com/product/5153)
### Part: CR1220 Battery
quantity: 1
3V Lithium Coin Cell Battery
[CR1220 Battery](https://www.adafruit.com/product/380)
### Part: M2.5 Screws and Stand-offs
quantity: 1
M2.5
[M2.5 Screws and Stand-offs](https://www.adafruit.com/product/3299)
### Part: Heat shrink
quantity: 1
Pack - 3/32" + 1/8" + 3/16" Diameters
[Heat shrink](https://www.adafruit.com/product/1649)
### Part: Silicone Wire
quantity: 1
30AWG in Various Colors
[Silicone Wire](https://www.adafruit.com/product/2051)
# Prop-Maker Feather Talking Adabot Clock
## Circuit Diagram
- **DS3231 STEMMA QT port** to **Feather STEMMA QT port**
- **Speaker +** to **Feather VO+ (red wire)**
- **Speaker -** to **Feather VO- (black wire)**
- **NeoPixel power** to **Feather V+ (red wire)**
- **NeoPixel GND** to **Feather GND (black wire)**
- **NeoPixel DATA IN** to **Feather PIXELOUT (yellow wire)**
- **Button output** to **Feather BUTTON (green wire)**
- **Button GND** to **Feather GND (black wire)**
# Prop-Maker Feather Talking Adabot Clock
## 3D Printing
The clock may be assembled with 3D printed parts, described below. The case is a remix of the [Adabot Toy Robot Friend](https://learn.adafruit.com/adabot-rp2040). The head, electronics mount and head covering are updated for this design.
The STL files can be downloaded directly here or from Printables.
[Adabot_Clock_STL_Files.zip](https://cdn-learn.adafruit.com/assets/assets/000/124/105/original/Adabot_Clock_STL_Files.zip?1693250986)
[Printables Download](https://www.printables.com/model/566538-talking-adabot-clock)
You'll print the following parts:
- 1x Adabot Head (light blue)
- 2x Antenna (dark blue)
- 2x Ear Cap (light blue)
- 1x Electronics Mount (any color)
- 1x Eye L (white)
- 1x Eye R (white)
- 1x Face Mask (black)
- 1x Head Cover (light blue)
- 1x Mouth (white)
- 2x Pupil (black)
# Prop-Maker Feather Talking Adabot Clock
## CircuitPython
[CircuitPython](https://github.com/adafruit/circuitpython) is a derivative of [MicroPython](https://micropython.org) designed to simplify experimentation and education on low-cost microcontrollers. It makes it easier than ever to get prototyping by requiring no upfront desktop software downloads. Simply copy and edit files on the **CIRCUITPY** drive to iterate.
## CircuitPython Quickstart
Follow this step-by-step to quickly get CircuitPython running on your board.
[Download the latest version of CircuitPython for this board via circuitpython.org](https://circuitpython.org/board/adafruit_feather_rp2040_prop_maker/)
**Click the link above to download the latest CircuitPython UF2 file.**
Save it wherever is convenient for you.
To enter the bootloader, hold down the **BOOT/**** BOOTSEL button**(highlighted in red above), and while continuing to hold it (don't let go!), press and release the**reset button**(highlighted in red or blue above). **Continue to hold the BOOT/BOOTSEL button until the RPI-RP2 drive appears!**
If the drive does not appear, release all the buttons, and then repeat the process above.
You can also start with your board unplugged from USB, press and hold the BOOTSEL button (highlighted in red above), continue to hold it while plugging it into USB, and wait for the drive to appear before releasing the button.
A lot of people end up using charge-only USB cables and it is very frustrating! **Make sure you have a USB cable you know is good for data sync.**
You will see a new disk drive appear called **RPI-RP2**.
Drag the **adafruit\_circuitpython\_etc.uf2** file to **RPI-RP2.**
The **RPI-RP2** drive will disappear and a new disk drive called **CIRCUITPY** will appear.
That's it, you're done! :)
## Safe Mode
You want to edit your **code.py** or modify the files on your **CIRCUITPY** drive, but find that you can't. Perhaps your board has gotten into a state where **CIRCUITPY** is read-only. You may have turned off the **CIRCUITPY** drive altogether. Whatever the reason, safe mode can help.
Safe mode in CircuitPython does not run any user code on startup, and disables auto-reload. This means a few things. First, safe mode _bypasses any code in_ **boot.py** (where you can set **CIRCUITPY** read-only or turn it off completely). Second, _it does not run the code in_ **code.py**. And finally, _it does not automatically soft-reload when data is written to the_ **CIRCUITPY** _drive_.
Therefore, whatever you may have done to put your board in a non-interactive state, safe mode gives you the opportunity to correct it without losing all of the data on the **CIRCUITPY** drive.
### Entering Safe Mode
To enter safe mode when using CircuitPython, plug in your board or hit reset (highlighted in red above). Immediately after the board starts up or resets, it waits 1000ms. On some boards, the onboard status LED (highlighted in green above) will blink yellow during that time. If you press reset during that 1000ms, the board will start up in safe mode. It can be difficult to react to the yellow LED, so you may want to think of it simply as a slow double click of the reset button. (Remember, a fast double click of reset enters the bootloader.)
### In Safe Mode
If you successfully enter safe mode on CircuitPython, the LED will intermittently blink yellow three times.
If you connect to the serial console, you'll find the following message.
```terminal
Auto-reload is off.
Running in safe mode! Not running saved code.
CircuitPython is in safe mode because you pressed the reset button during boot. Press again to exit safe mode.
Press any key to enter the REPL. Use CTRL-D to reload.
```
You can now edit the contents of the **CIRCUITPY** drive. Remember, _your code will not run until you press the reset button, or unplug and plug in your board, to get out of safe mode._
## Flash Resetting UF2
If your board ever gets into a really _weird_ state and CIRCUITPY doesn't show up as a disk drive after installing CircuitPython, try loading this 'nuke' UF2 to RPI-RP2. which will do a 'deep clean' on your Flash Memory. **You will lose all the files on the board** , but at least you'll be able to revive it! After loading this UF2, follow the steps above to re-install CircuitPython.
[Download flash erasing "nuke" UF2](https://cdn-learn.adafruit.com/assets/assets/000/101/659/original/flash_nuke.uf2?1618945856)
# Prop-Maker Feather Talking Adabot Clock
## Coding the Clock
https://www.youtube.com/watch?v=JwgP-pgEe7c
Once you've finished setting up your RP2040 Prop-Maker Feather with CircuitPython, you can access the code and necessary libraries by downloading the Project Bundle.
To do this, click on the **Download Project Bundle** button in the window below. It will download to your computer as a zipped folder.
https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/CircuitPython_Talking_Adabot_Clock/code.py
## Upload the Code and Libraries to the RP2040 Prop-Maker Feather
After downloading the Project Bundle, plug your RP2040 Prop-Maker Feather into the computer's USB port with a known good USB data+power cable. You should see a new flash drive appear in the computer's File Explorer or Finder (depending on your operating system) called **CIRCUITPY**. Unzip the folder and copy the following items to the RP2040 Prop-Maker Feather's **CIRCUITPY** drive.
- **lib** folder
- **clock\_sounds** folder
- **code.py**
Your RP2040 Prop-Maker Feather **CIRCUITPY** drive should look like this after copying the **lib** folder, **clock\_sounds** folder and the **code.py** file.
## How the CircuitPython Code Works
The code begins by enabling the external power pin on the Feather for the terminal block pins and instantiating the external button as a `keypad` object, the NeoPixels and the RTC module over I2C.
```python
# enable external power pin
# provides power to the external components
external_power = DigitalInOut(board.EXTERNAL_POWER)
external_power.direction = Direction.OUTPUT
external_power.value = True
# setup external button pin as a keypad object
key = keypad.Keys((board.EXTERNAL_BUTTON,), value_when_pressed=False, pull=True)
# neopixel mouth setup
pixels = neopixel.NeoPixel(board.EXTERNAL_NEOPIXELS, 8, auto_write=True, brightness=0.2)
blue = (0, 0, 255)
off = (0, 0, 0)
pixels.fill(off)
# rtc module
i2c = board.I2C()
rtc = adafruit_ds3231.DS3231(i2c)
```
## Set the Clock
Included in the code is an `if` statement that can reset the RTC module datetime. If you set it to `True`, you can edit the `struct_time` with your current time and save the code to save the settings to the RTC. Make sure to set it back to `False` so that you don't accidentally reset the time if the Feather reboots.
```python
if False: # change to True if you want to set the time!
# year, mon, date, hour, min, sec, wday, yday, isdst
t = time.struct_time((2023, 8, 22, 16, 47, 00, 1, -1, -1))
# you must set year, mon, date, hour, min, sec and weekday
# yearday is not supported, isdst can be set but we don't do anything with it at this time
print("Setting time to:", t) # uncomment for debugging
rtc.datetime = t
print()
```
## Bring in the Waves
The wave files in the **/clock\_sounds** folder are sorted into different arrays in the code. After that the files are sorted alphabetically.
```python
# sound arrays
bookend_sounds = []
hour_sounds = []
min_sounds = []
clock_queue = []
# bring in the audio files and put them into the different arrays
for filename in os.listdir('/clock_sounds'):
if filename.lower().endswith('.wav') and not filename.startswith('.'):
if filename.startswith('h'):
hour_sounds.append("/clock_sounds/"+filename)
elif filename.startswith('m'):
min_sounds.append("/clock_sounds/"+filename)
else:
bookend_sounds.append("/clock_sounds/"+filename)
# sort the arrays alphabetically
bookend_sounds.sort()
hour_sounds.sort()
min_sounds.sort()
print(hour_sounds)
print(min_sounds)
print(bookend_sounds)
```
## I2S and Mixer
Audio playback occurs with the onboard I2S amp on the Feather. Audio files are passed through a `Mixer` object so that you can control volume through software.
```python
# i2s amp setup with mixer
audio = audiobusio.I2SOut(board.I2S_BIT_CLOCK, board.I2S_WORD_SELECT, board.I2S_DATA)
mixer = audiomixer.Mixer(voice_count=1, sample_rate=22050, channel_count=1,
bits_per_sample=16, samples_signed=True)
audio.play(mixer)
mixer.voice[0].level = 0.5
```
## Playback Functions
Two functions are used for playing back the audio files. The first, `open_audio()`, opens the selected audio file and adds it to the `clock_queue` array.
```python
# function for queueing wave files
def open_audio(wavs, num):
n = wavs[num]
f = open(n, "rb")
w = audiocore.WaveFile(f)
clock_queue.append(w)
return w
```
The next function, `prep_clock()`, takes the time from the RTC module and searches the audio file arrays for the matching wave files. `f strings` are used to find a matching audio file. Then, the index location of that audio file is passed to the `open_audio()` function to add the chosen file to the `clock_queue` array.
```python
# function for gathering clock audio files
def prep_clock(hour_num, minute_num):
# queues "the time is.."
open_audio(bookend_sounds, 1)
# convert 24 hour time from RTC to 12 hour
if hour_num > 12:
hour_num = hour_num - 12
# set PM
ampm_num = 3
# otherwise its the morning
else:
# set AM
ampm_num = 0
# queueing hour, single digit waves have a 0 before the number
if hour_num <= 9:
print(hour_num)
h = hour_sounds.index(f'/clock_sounds/h0{hour_num}.wav')
else:
print(hour_num)
h = hour_sounds.index(f'/clock_sounds/h{hour_num}.wav')
# open wave file for the hour
open_audio(hour_sounds, h)
# if the minute is divisible by 10 (10, 20, 30, etc)
if minute_num % 10 == 0:
# check for on the hour (1:00, 2:00, etc)
if minute_num == 0:
m = min_sounds.index(f'/clock_sounds/m{minute_num}0.wav')
else:
m = min_sounds.index(f'/clock_sounds/m{minute_num}.wav')
print(minute_num)
# individual wave files exist for 1-19
elif minute_num <= 19:
print(minute_num)
# if it's a single digit number, bring in the "oh" wave file
if minute_num <= 9:
mm = min_sounds.index('/clock_sounds/m0x.wav')
open_audio(min_sounds, mm)
m = min_sounds.index(f'/clock_sounds/m{minute_num}.wav')
# otherwise, for minutes 21-59 that are not divisible by 10
else:
# we need to seperate the minutes digits
digits = list(map(int, str(minute_num)))
#print(digits)
# get the tens spot (30, 40, etc)
mm = min_sounds.index(f'/clock_sounds/m{digits[0]}x.wav')
# add the wav to the array
open_audio(min_sounds, mm)
# get the ones spot (1, 2, etc)
m = min_sounds.index(f'/clock_sounds/m{digits[1]}.wav')
# combined it will say ex: "30...5"
# add the wav to the array
open_audio(min_sounds, m)
# finish with am or pm
open_audio(bookend_sounds, ampm_num)
```
## The Loop
In the loop, the code listens for a `keypad` event from the button. When the button is pressed, the NeoPixels turn blue to illuminate Adabot's mouth. The RTC module is read and its hour and minute reading are passed to the `prep_clock` function to prepare the audio files for playback. Then, each queued audio file is played one by one. To finish up, the `clock_queue` array is cleared and the NeoPixels are turned off.
```python
while True:
# listen for button input
event = key.events.get()
if event:
# if the button is pressed
if event.pressed:
# read from RTC module
t = rtc.datetime
# turn on neopixels
pixels.fill(blue)
# gather the audio files based on RTC reading
prep_clock(t.tm_hour, t.tm_min)
# play through each wave one by one
for i in range(len(clock_queue)):
mixer.voice[0].play(clock_queue[i], loop=False)
while mixer.playing:
pass
# afterwards clear out the queue
clock_queue.clear()
# turn off neopixels
pixels.fill(off)
```
# Prop-Maker Feather Talking Adabot Clock
## Soldering
All of the wires should be approximately 4 inches/10 cm in length.
## Speaker
Solder wire to each of the speaker's wires to extend them.
Add heat shrink over the solder joints. The pieces should be about 0.5 inches/1.2 cm long or long enough to comfortably cover your solder joint.
## Button
Solder a piece of wire to each of the button pins.
## NeoPixel Stick
Tin the DIN, 5VDC and GND pads on the back of the NeoPixel stick.
Solder wire to the DIN, 5VDC and GND pads on the NeoPixel stick.
That wraps up all of the soldering. Now its time to assemble the clock.
# Prop-Maker Feather Talking Adabot Clock
## Head Assembly
## Head Parts
Gather up the parts to build the head. Parts include head case, eyes, pupils, mouth, ear caps and antennas.
## Install Eyes & Mouth
Press fit the two eyes and mouth parts through the corresponding cutouts inside the head case.
## Ear & Antenna
Insert the antenna through the peg of the ear cap. Repeat for the second ear cap and antenna.
## Install Ears
Press fit the ear cap through the ear of the head case. Repeat for the second set of ear cap and antenna.
## Pupils
Add the two pupils to the eyes by adhering with either super glue or double-sided tape.
## Face Mask
A separate "face mask" printed in a black colored filament will block the light from the NeoPixel LEDs from bleeding into the rest of the head.
## Face Mask Install
Apply super glue or double-sided tape to the surface of the face mask and press fit into the head.
# Prop-Maker Feather Talking Adabot Clock
## Electronics Assembly
## Mount the NeoPixel Stick
Attach the NeoPixel stick to the electronics mount with M2.5 screws and nuts.
## RTC Breakout
Insert a CR1220 coin cell battery into the RTC breakout.
Attach M2.5 stand-offs with M2.5 screws into the mounting holes above the NeoPixel stick on the electronics mount.
Attach the RTC breakout to the M2.5 stand-offs with M2.5 screws.
Plug in a STEMMA QT cable to the RTC breakout.
## Speaker and Button
Peel off the paper covering the adhesive on the front of the oval speaker. Insert it into the mount at the top of Adabot's head.
Mount the button through the hole at the top of Adabot's head.
## Mount the Mount
Insert the electronics mount into Adabot's head. Line up the mount's holes with the holes at the bottom of the head. Secure the mount with M2.5 screws and stand-offs in the mounting holes closest to the front of the head.
## Bring in the Feather
Insert M2.5 stand-offs into the mounting holes on the Feather. Secure them with M2.5 nuts. Plug the STEMMA QT cable from the RTC breakout into the STEMMA QT port on the Feather. Insert the wires from the components into the terminal screw block on the Feather:
- **Speaker positive** to **Feather VO+**
- **Speaker negative** to **Feather VO-**
- **Button output** to **Feather Btn**
- **Button GND** to **Feather G**
- **NeoPixel GND** to **Feather G**
- **NeoPixel DIN** to **Feather Neo**
- **NeoPixel 5V** to **Feather 5V**
The ground wires from the button and NeoPixel stick will _ **both** _ be inserted into the G terminal screw block together.
Mount the Feather to the electronics mount using M2.5 screws. The USB port should be lined up with the USB cut-out on the side of Adabot's head. The head has a lot of room for the component wires to be pushed in.
## In Closing
Finish up the build by closing up Adabot's head with the back lid.
And that completes your friendly robot clock friend!
## Featured Products
### Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier
[Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier](https://www.adafruit.com/product/5768)
The Adafruit Feather series gives you lots of options for a small, portable, rechargeable microcontroller board. By picking a feather and stacking on a FeatherWing you can create advanced projects quickly. One popular combo is our [Feather M4](https://www.adafruit.com/product/3857)...
In Stock
[Buy Now](https://www.adafruit.com/product/5768)
[Related Guides to the Product](https://learn.adafruit.com/products/5768/guides)
### Adafruit DS3231 Precision RTC - STEMMA QT
[Adafruit DS3231 Precision RTC - STEMMA QT](https://www.adafruit.com/product/5188)
The datasheet for the **DS3231** explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". And, hey, it does exactly what it says on the tin! This **Real Time Clock (RTC)** is the most precise you can get in a...
In Stock
[Buy Now](https://www.adafruit.com/product/5188)
[Related Guides to the Product](https://learn.adafruit.com/products/5188/guides)
### NeoPixel Stick - 8 x 5050 RGB LED with Integrated Drivers
[NeoPixel Stick - 8 x 5050 RGB LED with Integrated Drivers](https://www.adafruit.com/product/1426)
Make your own little LED strip arrangement with this stick of NeoPixel LEDs. We crammed 8 of the tiny 5050 (5mm x 5mm) smart RGB LEDs onto a PCB with mounting holes and a chainable design. Use only one microcontroller pin to control as many as you can chain together! Each LED is addressable as...
In Stock
[Buy Now](https://www.adafruit.com/product/1426)
[Related Guides to the Product](https://learn.adafruit.com/products/1426/guides)
### 16mm Panel Mount Momentary Pushbutton - Black
[16mm Panel Mount Momentary Pushbutton - Black](https://www.adafruit.com/product/1505)
OK, this item is pretty simple - it's a panel mount pushbutton. It's not that exciting, no LEDs, no bells & whistles. But we really like it anyways – look at that lovely rounded shape, that elegant bevel. If you're going to go with a momentary pushbutton, let it be this...
In Stock
[Buy Now](https://www.adafruit.com/product/1505)
[Related Guides to the Product](https://learn.adafruit.com/products/1505/guides)
### STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long
[STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long](https://www.adafruit.com/product/4210)
This 4-wire cable is a little over 100mm / 4" long and fitted with JST-SH female 4-pin connectors on both ends. Compared with the chunkier JST-PH these are 1mm pitch instead of 2mm, but still have a nice latching feel, while being easy to insert and remove.
In Stock
[Buy Now](https://www.adafruit.com/product/4210)
[Related Guides to the Product](https://learn.adafruit.com/products/4210/guides)
### Mini Oval Speaker - 8 Ohm 1 Watt
[Mini Oval Speaker - 8 Ohm 1 Watt](https://www.adafruit.com/product/3923)
Hear the good news! This wee speaker is a great addition to any audio project where you need 8 ohm impedance and 1W or less of power. We particularly like this speaker as it is small and comes with nice skinny wires with a connector on the end. It has a handy...
In Stock
[Buy Now](https://www.adafruit.com/product/3923)
[Related Guides to the Product](https://learn.adafruit.com/products/3923/guides)
### CR1220 12mm Diameter - 3V Lithium Coin Cell Battery
[CR1220 12mm Diameter - 3V Lithium Coin Cell Battery](https://www.adafruit.com/product/380)
These are the highest quality & capacity batteries, the same as shipped with the iCufflinks, iNecklace, Datalogging and GPS Shields, GPS HAT, etc. One battery per order (you'll want one battery per cufflink or pendant.)
Brand may vary but all battery brands are verified...
Out of Stock
[Buy Now](https://www.adafruit.com/product/380)
[Related Guides to the Product](https://learn.adafruit.com/products/380/guides)
### Pink and Purple Woven USB A to USB C Cable - 1 meter long
[Pink and Purple Woven USB A to USB C Cable - 1 meter long](https://www.adafruit.com/product/5153)
This cable is not only super-fashionable, with a woven pink and purple Blinka-like pattern, it's also made for USB C for our modernized breakout boards, Feathers, and more. [If you want something just like it but for Micro B, we...](https://www.adafruit.com/product/4111)
Out of Stock
[Buy Now](https://www.adafruit.com/product/5153)
[Related Guides to the Product](https://learn.adafruit.com/products/5153/guides)
## Related Guides
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