Tag Archives: Relay

Over Current Protection Switch

Current_Sense_Switch_IMG_4786

Current Sensing Switch is designed to operate a Relay Contact when there is a DC current through the sense resistor exceeds the set point, Set point adjustable from 1A to 3Amp using on board potentiometer. This circuit can offer over current protection to your project.

Specifications

  • Input: 12 VDC
  • Range: 1 to 3 A selectable with onboard preset
  • Output: SPDT Relay (Normally Open & Normally Closed)
  • Power Battery Terminal (PBT) and Terminal Pins for easy connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 52 mm x 47 mm

Over Current Protection Switch – [Link]

SMD Soldering Reflow Oven

F2FAAMTIM53QPAP.MEDIUM

Here is a nice tutorial on how to build your own reflow soldering oven using ControLeo2 reflow oven controller.

This particular instructable is based on the ControLeo2 reflow oven controller by Peter Easton. This is by far the best I’ve come across and the software is fully open source. It can control up to 4 solid state relays (SSRs), a servo motor (to open the door for cooling at the end of reflow process) and a buzzer. Most impressive is that it is self-learning. That means, it can adapt to your oven heating elements and their behavior. Thanks Peter for putting this out there! The electronics hardware design is based off Brian Barrett’s design. He is super helpful and I suggest reading his build guide (multiple times). Thanks Brian! 🙂

SMD Soldering Reflow Oven – [Link]

DC Motor Direction Controller with tact switches

DC_Motor_Direction_Controller_IMG

DC Motor Direction Control project offers direction control using digital logic gates and a DPDT relay.

Features

  • Supply input 12 VDC @ 75 mA
  • Power LED
  • DC Motor Direction LED Yellow/Green
  • Relay Output: up to 7 A
  • Onboard tactile switch for direction control
  • Relay based drive design with diode protection
  • LED indicator for direction indication
  • Power-On LED indicator
  • Terminal pins and screw terminal connector for easy input / output connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 41 mm x 81 mm

DC Motor Direction Controller with tact switches – [Link]

DC Output Solid State Relay

DC_Solid_State_Relay_I052A

DC Output Solid State Relay 10Amps 60V DC (Optically Isolated Input)

This project has been designed around TLP250/352 which is Opto-Coupler IGBT/MOSFET Gate Driver from Toshiba and Mosfet IRFP260 from IR, This relay consists of optically isolated gate driver and low impedance Mosfet. The combination of low resistance and high load current handling capabilities make this Relay suitable for a variety of switching applications. These devices are ideally suited for controlling high voltage and current DC loads with solid state reliability while providing 3750V isolation from input to output.

A solid-state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. SSRs consist of a Opto-isolator which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and a coupling mechanism to enable the control signal to activate this switch without mechanical parts. This relay designed to switch DC Load up to 10Amps. It serves the same function as an electromechanical relay, but has no moving parts. Solid-state relays have fast switching speeds compared with electromechanical relays, and have no physical contacts to wear out. Input trigger voltage 3V to 9V DC (1.5V to 12 V with Transistor) and output load 10Amps and supply 12V to 60V DC (100V DC also Possible). Gate Driver required supply 12V to 18V DC. Heat sink required for peak load.

DC Output Solid State Relay – [Link]

AC Solid State Relay

Solid_State_Relay_IMG2

This simple circuit designed around Solid State Relay S216S02 from SHARP. The S216S02 solid State Relay (SSR) is an integration of an infrared emitting diode (IRED), a Phototraic Detector and a main output Traic. These devices are ideally suited for controlling high voltage AC loads with solid state reliability while providing 4KV isolation from input to output.

A solid-state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. SSRs consist of a opto-isolator which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and a coupling mechanism to enable the control signal to activate this switch without mechanical parts. This relay designed to switch either AC load up-to 1KW. It serves the same function as an electromechanical relay, but has no moving parts. Solid-state relays have fast switching speeds compared with electromechanical relays, and have no physical contacts to wear out.

AC Solid State Relay – [Link]

Light and Dark Sensitive Switch

Light_Switch_Photo

Light / Dark Sensitive Switch project is a simple project which operates a relay when the light falling on the LDR goes below or goes above a set point.

  • Input – 12 V @ 50 mA
  • Relay output – SPDT relay
  • 2-in-1 kit, either as light sensitive kit or dark sensitive switch
  • Onboard preset to set the level
  • Power-On LED indicator
  • Relay On LED indicator
  • Power Battery Terminal (PBT) for easy relay output connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 50 mm x 54 mm

Light and Dark Sensitive Switch – [Link]

Large Current Relay Driver

I045A

This is a large current Relay module with single pole double throw switch which provides normally closed and normally open operations. The Relay is the most common used module in application such as home automation, industrial automation, and machine on/off. Sometimes you need to control large current such as the fans, lights, water heaters, room heaters, Air-conditioning, vacuum pumps That is what this Large Current Relay Module can be helpful to drive such high current load with just TTL signal. Easy interface with embedded systems and micro-controllers.

Features

  • Supply 12V DC
  • Current 190mA
  • Trigger Supply 3 to 8V DC
  • Optically isolated input for safety and noise immunity
  • 7 Pin Header for Inputs and 5V DC output
  • 3 Pin screw Terminals for Relay output

Large Current Relay Driver – [Link]

Single Channel SMD Relay Driver

I040B

Single Channel Relay Board is a simple and convenient way to interface a relay for switching application in your project.

Specifications

  •     Input supply 12VDC @ 42 mA
  •     On Board 5V Regulator provides 5V output
  •     Output SPDT Relay
  •     Relay specification 5 A @ 230 VAC
  •     Trigger level 2 ~ 9 VDC
  •     Header connector for connecting power and trigger voltage
  •     Relay operations status LED
  •     Power LED
  •     Tiny Design
  •     Screw terminal connector for easy relay output connections

Single Channel SMD Relay Driver – [Link]

WIFI based appliance module using the ESP8266 and a latching relay

relayboard-600x337

Steve writes:

This is an WIFI-based appliance module using the ESP8266 (ESP12) and a latching relay. The appliance module is powered from the AC line using an inexpensive 5V 1AMP universal input power supply which is attached to the board. There are provisions for local control using a pushbutton switch, and there is an option for a WIFI status LED. The firmware is written in C and the appliance module is controlled using MQTT and JSON.

WIFI based appliance module using the ESP8266 and a latching relay – [Link]