Internet of thing Digital Thermometer DS18B20

I purchased this ic a long time ago. Never had any chance of using it. But now the this small itsy bitsy integrated circuit is sending data on the internet. You can check the link at It is connected on a custom gateway device. The ds18b20 can take power in two ways. The circuit […]

3.3 volt receiver signal level Interface board for esp8266-01

In my previous attempt at designing this board here. It was good. But to make the pcb smaller. I redesigned the pcb, i shifted some component here and there. This PCB contains a 3.3v level shifter at the receiver pin. Here are the schematics and pcb layout. Etching time : 1 hour and 20 minutes […]