DIY the Itead Wifi Wireless Switch to Work Under 5V?

As my last post referred that the Itead wifi switch is set to work under AC current. It is very practical for home appliance. However, when consider to use it in electronic DIY, it is not so convenient. If I can make it work under 5V, I think it would be very helpful for electronics enthusiasts.

So how to make it happen? I find out the schematic and solder it a little bit. I make it able to work under either 5V or 90V-265V. It is not very hard work, just a few steps and some small changes will achieve it.

See the original board picture below:

Step 1. Remove the two resistors from 1 to 2.

Step 2. Remove the black cable in 3 to 2, which makes this black cable and the red cable become one for signal output and one for signal input, each can be either signal output or signal input, they works both ways.

Step 3.Now solder a black cable in 5V area, which makes it a 5V power input port.

And solder a black cable in GND to make it GND of 5V power supply.

While the two cables at the lower right corner keep the same. The black one is for 90V-265V output while the red one is for 90V-265V power input.

Therefore you can choose to power it up at either 5V or 90-265V, it is up to you.

Please see the below picture how it become. If you are not a professional electrician, never try to make this DIY. You know, the AC current is very dangerous. Your life is everything.