Pinouts

Power Supply

The two amplifier chips use the 3V + 5V + GND power pin at the 'top' of the 2x20 header. If using 3W speakers, you can draw a significant amount of current, over 1.5 Amps! Make sure you power your Pi with a good wall adapter like our 2.4A microUSB power plug.

5V 2.5A Switching Power Supply with 20AWG MicroUSB Cable

PRODUCT ID: 1995
Our all-in-one 5V 2.5 Amp + MicroUSB cable power adapter is the perfect choice for powering single-board computers like Raspberry Pi, BeagleBone or anything else that's power...
$7.50
IN STOCK

Alternatively, if you really need a lot of power, use a 5V 4A power adapter and then a DC to micro USB adapter

5V 4A (4000mA) switching power supply - UL Listed

PRODUCT ID: 1466
Need a lot of 5V power? This switching supply gives a clean regulated 5V output at up to 4 Amps (4000mA). 110 or 240 input, so it works in any country. The plugs are "US...
$14.95
IN STOCK

MicroUSB Plug to 5.5/2.1mm DC Barrel Jack Adapter

PRODUCT ID: 2727
The premise of this MicroUSB Plug to 5.5/2.1mm Jack adapter is simple. There's a MicroUSB plug on one end and a 5.5mm/2.1mm DC barrel jack with center...
$1.95
IN STOCK

I2S Audio Data Pins

The Bonnet uses 3 data pins and they cannot be changed! Pins #18, #19 and #21 are used. All other pins are available

Speaker Outputs

This is the fun part, you get stereo output - one left and one right channel. Each one is Bridge-Tied-Load so do not connect both outputs together to get more volume!

You can use the JST 4-pin plug in the center if you're going to just plug in one of our enclosed speaker kits:

Stereo Enclosed Speaker Set - 3W 4 Ohm

PRODUCT ID: 1669
Listen up! This set of two 2.8" x 1.2" speakers are the perfect addition to any audio project where you need 4 ohm impedance and 3W or less of power. We particularly like...
$7.50
IN STOCK

OR

You can use the terminal block spots on the left & right to connect regular speaker cones. You'll need to solder wires on and such but this way you can use whatever speaker you like! We suggest 8 ohm 1W or 4 ohm 3W. For louder audio, but more power usage, use the 4 ohm speakers. For quieter audio, but less power usage, use the 8 ohm speakers

Speaker - 3" Diameter - 4 Ohm 3 Watt

PRODUCT ID: 1314
Listen up! This 3" diameter speaker cone is the perfect addition to any audio project where you need an 4 ohm impedance and 3W or less of power. We particularly like this cone as...
$1.95
IN STOCK

Speaker - 3" Diameter - 8 Ohm 1 Watt

PRODUCT ID: 1313
Listen up! This 3" diameter speaker cone is the perfect addition to any audio project where you need an 8 ohm impedance and 1W or less of power. We particularly like this cone as...
$1.95
IN STOCK

You can also use other 'audio' devices like sonic transducers! These are devices you can put down onto a surface like a table, to make it into a speaker.

Medium Surface Transducer with Wires - 4 Ohm 3 Watt

PRODUCT ID: 1785
Turn any surface/wall/table etc into a speaker with a surface transducer. This type of speaker does not have a moving cone like most speakers you've seen. Instead, a small metal...
OUT OF STOCK
This guide was first published on Dec 07, 2016. It was last updated on Dec 07, 2016. This page (Pinouts) was last updated on Aug 17, 2019.