Relay Driver
Advertisements
The above is a standard way of driving Small Power Relays from Control Signals generated by Logic or Opamp Circuits.
C2 and R5 form a snubber which improves the life of the metal contacts, the contacts can erode due to sparking when switching inductive or even big loads. reduces EMI_RFI.
The Electromagnetic Solenoid Coil is rated by Volts and Ohms. If you choose 12V ensure a stable 12V is provided, more voltage will heat coil, less voltage will cause sparking or will drop out the magnetic holding. A high coil resistance is better as the heat will be less and power consumption of your design is low.
Related Links
More Electronic Control Circuit
More about Relay Switch Circuit
Light Relay Switch By BC547 & BC337
Opto-Thermo Control Relay Switch with IC 741
Dfferential Temperature Relay Switch by IC 741
Single Transistor Relay Toggle Circuit
Relay Toggle Circuit Using a 556 Timer
Relay Toggle Circuit Using a 555 Timer
Read More Source :
http://schematics.blogspot.com/2005/12/relay-driver.html
Thank you.
Best View 800x600 pixel
Email : 
Copyright 2008 www.elecfree.com/electronic/
