Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...

Abstract: A compact microelectromechanical (MEM) switch design and associated family of logic gates, memory cells, and other basic very-large-scale integration (VLSI) digital circuit sub blocks are ...

Abstract: IN THE CONTROL and protective circuits of complex electrical systems it is frequently necessary to make intricate interconnections of relay contacts and switches. Examples of these circuits ...

This PCB was planed for Sainsmart 4-Channel 5V Relay Module. It is alss possible to measure the current if ACS712 is connected to the prepared header. ACS Generic male header - 3 pins pin spacing ...

This project provides firmware for an ESP32-based relay boards which you can find in great number at Aliexpress, Amazon or Botland. Alternatively, you can use this firmware if you want to contol any ...