Lex Kravitz has designed a simple board containing the ULN2003 stepper motor driver in a Feather form factor:
Feather ULN2003 Stepper Wing
This Feather Wing was made to be hand assembled with through-hole components, which I find easier to put together in small runs. In the future I may make a version with SMD components as well for professional manufacture. I made this to control 5V 28BYJ-48 steppers that are easily available for ~$2-3 each. Often they come with a ULN2003 driver board, if you are thrifty you can grab the chip off the board and move it to this board saving ~50 cents per board.
This board contains:
1) Two 3-pin headers (GND, PWR, and SIG). These can be used to control a servo or additional sensor.
2) A 3.5mm TRRS port for external control
3) Two LEDs tied to digital pins
4) The ULN2003 motor driver
5) Two small buttons for user control
Jared Wolff has design a Feather form factor board with the nRF9160:
The nRF9160 Feather Is Now Served
Low-power shutdown, built-in 4FF SIM card slot, flexible power supply, and more.
I was a complete failure. My prototype wasn’t working. I spent at least an hour trying to rework a frustratingly large LTE module on an impossibly small circuit board.
It wasn’t going to work.
So I went back to the drawing board. I poured my years of hardware experience into a tiny form factor.
The end product?
Something smart. Something with LTE, NB-IoT, and GPS. Something anyone could get started with right away.
And thus, the nRF9160 Feather was born.
I need your help! 🙏
To make this campaign a reality, I need your help to meet our minimum order quantity of nRF9160 Feathers. Without that, we’re dead in the water! Head on over to the campaign page to reserve yours.
For those of you who’ve already committed, I thank you from the bottom of my heart. I can’t wait to get the nRF9160 Feather into your hands!
P.S. Huge thanks to Hackster and GroupGets for making this happen. You guys and girls are great. ❤
From Radomir Dopieralski on Hackaday.io:
A shield for Adafruit Feather boards with buttons and a LED matrix display, for simple games.