piclist 1999\04\04\115613a >
Thread: Relay problem..
picon face BY : Harold Hallikainen email (remove spam text)

On Sun, 4 Apr 1999 18:11:16 +0300 Andreas Nyholm <spamBeGonea.nyholmspamBeGonespamEraseMEAGROLINK.FI>
>I'm going to have my PIC16F84 to pull a relay.
>My relay is 55 ohm and I'm wondering if I just can put a 220 ohm
>resistor in serial to the relay and then straight up to Vdd. But
>certainly I must have a diode over the relay, but should it work

       What is the rated coil voltage of the relay?  With the circuit you
propose, the relay coil will get about 20% of the 5 volts available on
Vdd, or 1 volt.  I doubt this is enough to pull in the relay.


You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]

<19990404.085408.-209399.3.haroldhallikainen@juno.com> 7bit

See also: www.piclist.com/techref/io/motors.htm?key=relay
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) Relay problem..

month overview.

new search...