I am using the +12VDC from a PC PSU to switch mains using a relay ie when the PC turns on mains power gets supplied to some amplifiers.
Do I need diode protection across the relay coil for when the PC PSU switches off, or do such PSUs have such protection built in?
-- Dirk Full Spectrum Praxis : ZERO STATE : http://zerostate.net
If the relay coil is connected directly to the 12 volt supply, you don't need any other parts. There will be no flyback voltage.
-- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
"John Larkin"
** So this Dirk dude imagines he is an engineer ??ROTFL !!
.... Phil
The PC powersupply has a bridge rectifier and some large capacitors on the 12V output, if the capacitors don't suffice to provide a slow enough voltage drop the rectifier will clamp the flyback peak voltage to somthing smaller than -1V
-- ?? 100% natural --- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net
Strangely enough, this is the first time I have ever used a mechanical relay.
-- Dirk Full Spectrum Praxis : ZERO STATE : http://zerostate.net
** That supposed to be some kind of excuse ?
It ain't.
Based on your past record I assume your excuse is mental illness
-- Dirk Full Spectrum Praxis : ZERO STATE : http://zerostate.net
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