This is up and working, after I made the boards I discovered some errors, but those have been overcome. This will go into a future amplifier.
|Click on Graphic/ Link For Zoom/Download||Click on Graphic/ Link For Zoom/Download||Description|
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Here is shown the PCB populated with components. Just feed in some AC and you are ready to go.Also shown is the schematic. To understand how it works, check the Elliot Sound Projects web site, project #39, figure 2.
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My 1st PCB layout had some mistakes, grounding out the power supply and swapping the drain and source on the MOSFET! Shown are the old layout with the appropriate corrections to make the layout work as well as a corrected layout. I've not actually built the corrected one, but there are only a few changes so it should work. I have verified the corrections to the old one make it work as it should. See the movies. Not shown in the old layout are the jumpers (they are shown in the corrected layout). You need to add jumper wires as shown in red if you want to use the undelayed DC output terminals (top and bottom left of board) in either of the layouts.
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The red light goes on when power is applied, and the green one comes on after the delay. Simple. Pretty poor resolution from my digital camera.