Free Elektor Article: A 3-Dollar Tiny Wi-Fi Switch That Works
IoT

Free Elektor Article: A 3-Dollar Tiny Wi-Fi Switch That Works

Out of curiosity I ordered a tiny ESP8266 relay switch board from aliexpress.com, for next to nothing. Blissfully unaware, then, of the struggle ahead to make the thing work as advertised. I survived and conquered — here’s the story. By Somnath Bera @ elektormagazine.com The little...

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Toshiba Launches Voltage Drive Photorelay with a Tiny 2.9mm2 Footprint
Parts

Toshiba Launches Voltage Drive Photorelay with a Tiny 2.9mm2 Footprint

Tiny device features lower input power to reduce equipment size and power consumption Toshiba Electronics Europe (“Toshiba”) announces the availability of a new voltage driven photorelay with a tiny S-VSON4T package and reduced input power dissipation. The new product, designated...

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Window Comparator – Window Detector with relay output
Miscellaneous

Window Comparator – Window Detector with relay output

A window detector circuit, also called window comparator circuit or dual edge limit detector circuit is used to determine whether an unknown input is between two precise reference threshold voltages. It employs two comparators to detect over-voltage or under-voltage condition. This...

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How to lower relay power consumption
Control

How to lower relay power consumption

Clever way of starting-up relays discussed in this app note from Maxim Integrated. via dangerousprototypes.com Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. On the other hand, the...

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Ethernet Relay board
IoT

Ethernet Relay board

LAN interface with 4 relays, 8 programmable  I/Os and 4 analog inputs, IoT-ready. How many times have you read or heard about the Internet of things (Iot)? The Internet of things is an expression that is becoming more and more popular lately; it represents the expansion of the...

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Understanding Relay Coil Voltage Specifications
Basic Electronics

Understanding Relay Coil Voltage Specifications

by Robert_Fay @ digikey.com: When learning about relays there are a couple coil voltage specifications that can be a little tricky to understand. There are typically 4 specification for coil voltage listed in the datasheet. For this example we will be looking at relay part Z2352-ND 14....

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4 Channel Relay Shield for Arduino UNO
Arduino

4 Channel Relay Shield for Arduino UNO

4 Channel Relay Shield for Arduino UNO is a simple and convenient way to interface 4 relays for switching applications in your project. Very compact design that can fit on top of Arduino UNO. Project requires 12V DC supply, all 4 trigger inputs require TTL signal, Relay-1 to Relay-4...

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2 Channel Relay Shield for Arduino Nano
Arduino

2 Channel Relay Shield for Arduino Nano

2 Channel Mini easy to use Relay shield for Arduino Nano consists of ULN2003 IC and 2 Mini 12V Relays with NO/NC contacts of 2A-24V Load Capacity. ULN2003 used as Relay coil driver. Relay can be controlled from D3 and D4 of Arduino Nano. Three pin Header Connector CN1 and CN2 provided...

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