[Successful test] Expansion board based on arduino UNO

【Ugly Death Warning】

Expansion board based on arduino UNO (with ICSP interface)

• Comes with a DC-005 input port (I don’t know why I added it when UNO already has it)
• The input voltage of the DC port is 6V-12V; originally, I planned to add a self-restoring fuse, but the fuses I have in stock here are all 8V fuses, which means that its power supply range is greatly reduced. If you need it, you can choose to add it yourself.
• The step-down solution uses two AMS1117s to supply power to the 5V and 3V3 pin headers respectively, and then connected in parallel with UNO's own AMS1117-5.0, the output current can reach 1.6A+ (not recommended)
• It directly leads to the power indicator light and the "L" light on the UNO board (i.e. the LED on pin 13), which is active at high level (the indicator light of the serial port is not led because it is too far, fearing that it will affect the communication efficiency of the serial port)
• This expansion board chooses to directly avoid the Type-A port, which perfectly avoids the problem of edge warping or even short circuit caused by the board pressing against the Type-A port.
• The reset button of this expansion board is designed next to the DC socket, and the button is small and difficult to press. It is considered useless (don’t ask, the other buttons are out of stock)
• This expansion board leads to 6P and 10P ICSP interfaces respectively, and can also be used to convert 6P/10P pins to each other.

log

2020-4-26

Finally received the PCB that has been waiting for N days. It is estimated that the finished soldered product will be ready within 100 million days.

2020-5-1

After some time, the finished product was welded out and the actual test was successful.

It is strongly recommended to use blue/black/red boards, never green ones (very ugly)!

It is seriously recommended to solder the patch first and then the pin header, otherwise you will suffer a lot.