Go Down

Topic: relay shield? (Read 488 times) previous topic - next topic

merlin2049er

Hi, what's the largest # of relay channels the arduino can handle?

What I'd like to do is use relays to control a stepped attenuator or TVC with a bluetooth module (and android using btinterfaces).

Thanks,
Joe

LarryD

Each o/p can power a driver transistor or driver chip which in turn can drive a relay.
You can use multiple extender ICs, registers that can be placed in series to extend your relay count.

Why not tell us how many relays you need to drive?
No technical PMs.
The last thing you did is where you should start looking.

merlin2049er

23 steps x 2 channels. 

I was thinking of removing the physical switches for relays, control via bt and arduino.

LarryD

Which Arduino chip/board are you thinking of using?
No technical PMs.
The last thing you did is where you should start looking.

LarryD

Review this:
http://tronixstuff.wordpress.com/2011/08/26/tutorial-maximising-your-arduinos-io-ports/
No technical PMs.
The last thing you did is where you should start looking.

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy