The new STM32F4 Stamp Mini is based on Frank Zhao's
design. It should work as his stamp. You can
try his software at his web site:
The above bare PCB is available at OSHpark: https://www.oshpark.com/profiles/firebirduino,
$8.00 for 3 pieces, and free shipping.
Open Source Hardware, no license needed.
For easier to solder, I tried
to avoid 0201, all
resistors and capacitors are in 0402 except four 22
PFs in 0603.
2. D1 is MBR120, 20V 1A.
3. U1 is AP2210N-3.3V, up to 13V max. input,
0.3A. I used this one because I have some at hand.
You can use AP2112K-3.3V, 5V input, 0.6A.
4. The middle 2 pins of the J3 are not wired.
I don't know if it's better for SWD signals or a
UART's RX and TX.
You probably can wire then easily, or let me know, I
can modify the PCB.
5. An 8 MHz crystal in small size is
expensive. Instead, I installed a HC-49/US on the solder
Arduino UNO is a
registered trademark of Arduino, LLC.