Relay for a Motor

[krazykajun05]

I need a relay that will switch a small motor from forward, reverse, and off.  Any suggestions of where to find one? Thanks

[airman00]

what are the motor specs?


check out allelectronics.com


also, why are you using a relay and not an H bridge or motor driver

[benji]

you dont need a relay unless you are dealing with a relative high voltage operating motor(above 25 volts).
and if you need one there are 2 types of relays, dc and ac
the dc operates at 24 volts and it can pass a relatively big current through it
the ac ones need ac voltage at its input to conduct

just google dc or ac relays and youll get big info about em

[airman00]

the dc operates at 24 volts and it can pass a relatively big current through it

there are many types of relays , many even rated @ 5V

[benji]

there are many types of relays , many even rated @ 5V

thats a better one i guess if you dont need very big currents at the output

[airman00]

there are many types of relays , many even rated @ 5V

thats a better one i guess if you dont need very big currents at the output

yep

but relays have a limited amount of switching times , whereas H bridges last almost forever

[benji]

relays have slower switching than transistors (bridges) too

[krazykajun05]

Thanks for the info.  I am trying to control two motors, one for each set of tracks.  Therefore I can steer the robot by switching one track forward and the other reverse, like a small tank.  The motors are can be powered by 1.5-3V, 0.2 Amps.  Sounds like the H-brigde is the way to go.

[airman00]

Thanks for the info.  I am trying to control two motors, one for each set of tracks.  Therefore I can steer the robot by switching one track forward and the other reverse, like a small tank.  The motors are can be powered by 1.5-3V, 0.2 Amps.  Sounds like the H-brigde is the way to go.

I would suggest using the L293  chip

search google for details

we can help you out with it

[Admin]

fyi, you can make H-bridges using relays. The old motor drivers back in the 90's used relays - I still own some too.

But obviously its much better using mosfets for an H-bridge . . .