Thermostat

[koossa]

Good day

My father purchased a thermostat hobby kit to switch a element on and off for his little parrots.
See (http://www.esr.co.uk/manuals/manual_mk138.pdf)

The relay that's in the circuit cannot handle 220v AC, can I replace it with a relay that can handle 220v AC or can I use the temperature sensor in my own pic project to switch another relay from picbasic?

Thank you!!

[Ioannis]

Th relay footprint is common and you can find all flavors of relays.

Another solution is to use an external 24V relay and then drive your 220 volt load.

Ioannis

[koossa]

Ioannis, thank you very much for your reply.

So do I understand correctly that one option is to replace the relay with another one that's for example 12v / 220v?

[Ioannis]

You are correct.

Have a look at digikey, farnell or you favorite provider.

Ioannis

[koossa]

Thank you very much, I really appreciate it!!!

[malc-c]

Or you could use an opto-isolator and Triac to switch the mains voltage. The advantage of a relay is that it's fairly safe, but the noise from being energized could send you an your parrot bonkers !

[malc-c]

or can I use the temperature sensor in my own pic project to switch another relay from picbasic?

You could use a DS18B20 or LM35 digital sensor and a PIC and easily make your own - I've just completed a 4ch pulse proportional thermostat and light controller for my snakes based on an 18F4580 and 4 x DS18B20 sensors

[koossa]

Thank you Malcolm.

Would it also work if I "reinforce" the 220v part of the tracks with thick copper cable?

[malc-c]

To be honest - mount the relay off the board - then take two wires from the coil to the PCB, then wire your mains wiring to the relay.

[Ioannis]

Malcom, have you done any Audio Amplifiers or Pre-amps inthe past?

Ioannis

[malc-c]

No, why ???