NEW TUTORIAL: USB Foot Switch
Adafruit carries a lovely foot switch which has a single pole-double throw switch inside. The switch can activate a number of items including an alarm or powerswitch tail to control your world.
A much-requested project by Adafruit customers is using the foot switch to interface with a PC via universal serial bus (USB). To get a switch activation to talk to the USB bus takes a controller – some smarts.
Adafruit’s ATtiny85 based Trinket is low cost and contains enough smarts to perform USB communication (via some smart library software).
Only three parts are required. The foot switch, a USB A to Mini-B cable, and a Trinket 5V. The entire project costs less than $20. And it takes less than an hour’s work.
The wiring is shown above. The existing foot switch wires are cut short and two connected to Trinket pins #0 and GND (ground). When the foot switch is activated, the switch contact pair that creates a short connects Pin #0 with ground. When the Trinket detects the pin connected to ground, it outputs one or more characters as a PC keyboard.
The Trinket Keyboard tutorial states a Trinket 5V should be used due to the microcontroller clock rate the library uses.
See the full tutorial here!
Join 4,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord
Learn “How Computers Work” with Bill Gates, Ladyada and more – From Code.org !
CircuitPython in 2018 – Python on Microcontrollers is here!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/
Maker Business — Prototyping PCBs with Particle, a guide from a pro in the field #makerbusiness
Wearables — Learn about stretch
Electronics — Test for interference on the cheap!
Biohacking — Visualizing FLU Data with Wearables
Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com
No comments yet.
Sorry, the comment form is closed at this time.