Modification of Sonoff Pow R2 to connect CT sensor and measure AC power. It might be useful when measuring higher power than 15A Sonoff can handle or when you can not cut AC line wires. Original Sonoff shunt circuit inside can be left untouched, need to solder only two wires inside. Circuit diagram, left is […]
Category: Electronics
Pulse To Tone Converter based on Arduino (sorry no good schematic, just drawing): Video how it works: Operation: It detects rotary pulses on the phone line and counts them according to preconfigured time thresholds, then converts counted pulses to digit, selecting needed audio file from SD card an plays it as a tone to the […]
Wind turbine electric brake controller based on Arduino Nano: Video how it works: This brake controller is monitoring voltage and wind speed with custom made anemometer. Voltage limit and wind RPM limits are set by two simple potentiometers. Set limits and measured values are displayed on small OLED screen. Controller is as separate system for […]
You will not be able to ring old rotary phone with DC power, you will need specific low frequency AC power ~40-70v AC of 25-30Hz. Sample circuit for this purpose can be found here in this post. However please note that this circuit is far away from optimal, it was designed based on old components […]