Modify KaKu to WKaKu Power Socket - stodev-com-br/Tasmota GitHub Wiki
![Exterior](https://github.com/arendst/arendst.github.io/raw/master/media/wkaku1a.jpg)
![Kaku](https://github.com/arendst/arendst.github.io/raw/master/media/kaku2a.jpg)
I have several of these lying around and they can be used very well with sonoff functionality. As the sonoff PCA is a bit too large I decided to design my own PCA using kicad.
![wKaku prototype](https://github.com/arendst/arendst.github.io/raw/master/media/wkaku2a.jpg)
![wKaku v1.3](https://github.com/arendst/arendst.github.io/raw/master/media/wkaku4a.jpg)
I decided to select the HiLink 5V power supply as it was also favourable on other sites. The relay now has the same connections as the one used in sonoff.
![wKaku parts](https://github.com/arendst/arendst.github.io/raw/master/media/wkaku5a.jpg)
![wKaku pca](https://github.com/arendst/arendst.github.io/raw/master/media/wkaku6b.jpg)
= HiLink 5V power supply HLK-PM01 (aliexpress)
= 5V to 3V3 step down (aliexpress)
= 5V relay OJE-SH-105DM (ebay)
= ESP12-F (aliexpress)
= Capacitors and led from kaku PCA
= 2 x 1k and 1 x 10k Resistors
The image on the right shows how I mounted the ESP12-F vertically. Notice the 10k resistor from GPIO15 to the board.
The firmware used is sonoff without modification!