555 timer circuit to control 12v solenoid air valve (for intermittent bursts of air).

[Wal]

Cheers John,

I spotted this online earlier:

http://www.robotshop.com/uk/adjustab...ering-kit.html

Might do the trick, although the output voltage is 24v as opposed to the 12v the solenoid wants.

Cheers for the additions to the diagram, I'll post my results if I make one..!

Wal.

[Clive S]

Cheers John,

I spotted this online earlier:

http://www.robotshop.com/uk/adjustab...ering-kit.html

Might do the trick, although the output voltage is 24v as opposed to the 12v the solenoid wants.

Cheers for the additions to the diagram, I'll post my results if I make one..!

Wal.

Wal See your email. It is the contacts that are rated at 24v 3A

[Wal]

Cheers Clive..!

That's me being dumb again...! If it helps anyone else reading this:

The output is the relay contacts RATED at 24V 3A and not outputting anything. ie the relay is just a switch that changes state. So the control circuit runs off 12V and you can run the air valve off 12v through the relay.

Thanks again Clive!

Wal.

[john swift]

Hi Wal

the Velleman kit should make it easier

looking at the circuit it runs of a 12V supply - ideal for your solenoid valve (don't forget to add the diode across the coil)

MK111 kit






John