Quote:
Originally Posted by Philips210
Frank's suggestion looks a good solution to the problem. I am also all for doubling up on the switch contacts if possible to spread the current flow for best contact life.
On a similar note maybe a power MOSFET to carry the radios's supply current is another idea. I built a bedside timer for my late father's Roberts R701 radio which used a MOSFET to control the radio's supply. From memory the circuit was in September 2000 EPE magazine. I think it was a circuit provided by a reader.
Regards,
Symon
|
Wow, superb memory Symon!
Page 679 of EPE September 2000 indeed has a reader provided "Radio sleep timer" - with their values for about an hour, with a neat 3.5mm plug+socket arrangement that allows it to be disconnected leaving normal operation, very nice.
The actual switching uses a BUZ71A MOSFET as you accurately recalled - am going to use this idea (with different components) to help a sickly Roberts as suggested.