Before the Raspberry Pi came out, one cheap and easy way to get GPIO on a computer with a real operating system was to manipulate the pins on an old parallel port, then most commonly used for printers ...

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: The Internet of Things (IoT) has become more prevalent in recent years and is an integral part of everyday life. Thus, the need for ultralow-power sensors and processing units has ...

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 ...

Update 2023-01-11: I did lots of cleanup in this repository. I made a minor update to the main board file to take advantage of newer kicad features but otherwise it should be unchanged. This circuit ...

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 ...