Deprecation Warning: The Trinket bit-bang USB technique it uses doesn't work as well as it did in 2014, many modern computers won't work well. So while we still carry the Trinket so that people can maintain some older projects, we no longer recommend it.

Tiny little servo can rotate approximately 180 degrees (90 in each direction) and works just like the standard kinds you're used to but smaller. You can use any servo code, hardware, or library to control these servos. Good for beginners who want to make stuff move without...

Piezo buzzers are used for making beeps, tones and alerts. This one is petite but loud! Drive it with 3-30V peak-to-peak square wave. To use, connect one pin to ground (either one) and the other pin to a square wave out from a timer or microcontroller. For the loudest tones, stay around 4 KHz,...

This potentiometer is a two-in-one, good in a breadboard or with a panel. It's a fairly standard linear taper 10K ohm potentiometer, with a grippy shaft. It's smooth and easy to turn, but not so loose that it will shift on its own. We like this one because the legs are 0.2" apart...

CdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When it's light, the resistance is about ~1KΩ, when dark it goes up to ~10KΩ.To use, connect one side of the photocell (either one, it's symmetric) to power...

Customers have asked us to carry basic perf-board, but we never liked the look of most basic perf: it's always crummy quality, with pads that flake off and no labeling. Then we thought about how people actually prototype - usually starting with a solderless breadboard and then...

This battery holder connects 3 AAA batteries together in series for powering all kinds of projects. We spec'd these out because the box is slim, and 3 AAA's add up to about 3.3-4.5V, a very similar range to Lithium Ion/polymer (Li-Ion) batteries and have an on-off switch. That makes...

Battery power for your portable project! These batteries are good quality at a good price, and work fantastic with any of the kits or projects in the shop that use AAA's. This is a pack of 2 AAA batteries.These batteries are Alkaline (MnO2) chemistry,...

Female header is like the duct tape of electronics. Its great for connecting things together, soldering to perf-boards, sockets for wires or break-away header, etc. We go through these guys real fast, and thought that given how handy they are, we'd offer them in a pack of five!

Breakaway header is like the duct tape of electronics. It's great for connecting things together, soldering to perf-boards, fits into any breakout or breadboard, etc. We go through these guys real fast, and thought that given how handy they are, we'd offer them in a pack of ten!

Perfect for bread-boarding, free wiring, etc. This spool of solid-core wire is easily soldered to and is rated 80C and 300V (UL AWM style 1007). When bent it keeps its shape pretty well. We like to have a few spools of this stuff around. We suggest picking up wire strippers to match. Wire...

Perfect for bread-boarding, free wiring, etc. This spool of solid-core wire is easily soldered to and is rated 80C and 300V (UL AWM style 1007). When bent it keeps its shape pretty well. We like to have a few spools of this stuff around. We suggest picking up wire strippers to match. Wire...

Perfect for bread-boarding, free wiring, etc. This spool of solid-core wire is easily soldered to and is rated 80C and 300V (UL AWM style 1007). When bent it keeps its shape pretty well. We like to have a few spools of this stuff around. We suggest picking up wire strippers to match. Wire...

Handy for making wire harnesses or jumpering between headers on PCB's. These premium jumper wires approximately 6" (150mm) long and come in a 'strip' of 40 (4 pieces of each of ten colors). They have 0.1" sockets on either end and fit cleanly next to each other on...

Lithium-ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light, and powerful. The output ranges from 4.2V when completely charged to 3.7V. This battery has a capacity of 1200mAh for a total of about 4.5 Wh. If you need a larger battery,