|Class D Switching Power Amplifiers and Power D/A conversion|
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|23rd March 2005, 05:02 PM||#1|
Join Date: Dec 2004
Location: London & Sweden
Remote Zap Standby circuit
This is my absolutely first design (newbie), so please tell me if you see any serious problems with it!
I have a preamp with a switchable 230V output (when I turn on the amp I get a 230V output). I want to use this output to put my zappulse into active mode using the standby function.
The idea is simple. The output runs through a power supply and switches a relay that is connected to the zappulses. There is also a LED that shows if the zap is active.
To be able to use the amp without the preamp, I have made a switch (S1 in schematic) that takes power from the 15V gate from the predator to power the relay if wanted. In other words the switch is marked "off / external" in one position and "on" in the other. It is marked in the schematic.
The 78L12 might be changed to a standard LM7812 depending on the relay used.
The schematic is in a .wmf format, but should be viewable on all windows computers?
Thanks for any comments!!!
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