please dont rip this site

Relay / Solenoid IO Driver:

Lowest Cost for Higher Voltage coil

Ken Webster says:

Low cost option:

To turn relay on: raise output to logic "1", Vdd
To turn relay off: drop output to logic "0", GND

The diode shunts voltage overshoot from the coil's inductance when the transistor is switched off and prevents damage to the transistor.

You can substitute similar transistors for 2N3904 if available or cheaper: 2N2222 is a close substitute

            +24
             |
             |---------,
           relay       ^
            coil     diode
             |---------'
           drain
  +5  --- gate      N Channel Hexfet
 control   source
             |
            GND

  • Very low parts count
  • Good for high voltage relay coils
  • Good for high current relay coils
  • High impedance input

Select an enhancement-mode N-channel MOSFET or HEXFET which completely turns on at 5 volts (such devices are often referred to as "logic level" FETs). Choose current and voltage ratings larger than your relay coil requires. An inexpensive device capable of driving 1A at 100V is the IRLD110.

Add a reverse biased diode across the relay coil to protect the driver. Any diode with a current rating higher than the current of the coil and a voltage rating higher than the voltage of the coil may be used. 1N4001 is a low-cost diode suitable for most applications.


file: /Techref/io/relay/smallHV.htm, 2KB, , updated: 2009/1/26 15:10, local time: 2024/10/10 04:29,
TOP NEW HELP FIND: 
35.173.48.18:LOG IN
©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!

 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://www.ecomorder.com/techref/io/relay/smallHV.htm"> Relay driver, Solenoid driver, relay, solenoid, IO</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

 

Welcome to ecomorder.com!

 

Welcome to www.ecomorder.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .