Several makes of multi channel relay boards that are controlled over an RS232 serial port. I am testing with a model that uses a ULN2803A chip also noted as a darlington array and an RS232 level ...

This project uses a 4-channel Lora remote controller to independently control 4-Channel Lora Relay 10A. Each button on the remote corresponds to a specific relay, allowing users to remotely switch ...

Automates gas/water valves, lights, pool covers, gates or sprinkler systems, etc. Remote operation of three separate devices controllable by an SPDT relay Operates on a low voltage AC power source ...

Hobbyists, electronic enthusiasts and makers may be interested in a new 4 channel relay board aptly named the RelayFi. The 4 channel smart relay board is powered by a ESP32 WROOM providing the ability ...

It is very easy to build an “SMS-controlled relay” with the help of a cheap GSM modem module and a small microcontroller board. Here, I’m using the SIM800L and Arduino Nano V3 to develop a nifty ...

It’s been less than a year since the ESP8266 WiFi Module was released. This is a chip whose original data sheets were only available in Chinese, could only be controlled through AT commands, and was ...

Abstract: This paper investigates the block error rate (BLER) performance and proposes an optimal power allocation scheme of a two-hop decode-and-forward full-duplex ...

Data Device Corporation (DDC) introduces a new 32-Channel Solid-State Power Controller (RP-26611000N0) featuring high power density and advanced programmability. Jan. 21, 2015 2 min read Data Device ...