I just killed Arduino Nano 😭

I was in the middle of experimenting with nRF24. It was working properly but suddenly the receiver was off, power led also off.

I removed all connection and components one by one and discovered the electrolyte capacitor is causing the issue. I measure the capacitor resistance is around 0.69 ohm. (Picture below show 1.69 ohm but using proper probe it is actually 0.69 ohm)

I connect back everything and it is still no working. I measure the 5V voltage drop to 2.9V, something else is dead. Looking at schematic, look like the diode is burn. It cannot handle 7.25A (5V/0.69)😬.

Looking at the SD101CWS spec, there is might be design mistake. Forward current is only 30mA, too low. Imagine 10 output connected to 20mA LED, that already 200mA. The original Arduino Nano is using SS1P3L which have forward current of 1.5A

SD101CWS forward current spec:

SS1P3L forward current spec:

I removed everything again and measure the current drawn by Arduino Nano. It show zero, although I expect some current because of the power LED. Anyway nothing else seems to be short, which is good. I can probably fix it by replacing the diode.

However, buying "SS1P3L diode" spare part is expensive, more expensive than buying new Arduino Nano 😡. No one sell one piece, minimum 50 pieces, not to mention delivery cost 😡.

I'm thinking to just short it, but must be carefully if using Vin. Make sure not to connect USB when Vin is connected, otherwise it might damage PC/laptop USB because no more current blocking.