26-04-2015, 09:53 PM
I shoud have taken the trouble to check the 555 spec! It reveals that the output (pin 3) when high, is approx 2V beow the supply rail and will deliver up to 200mA - far more than is needed to operate a small relay. A diode across the relay coil maybe, to cope with back EMF?
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
