I've built the diagram and am just not sure about it's inner working. I've set up everything and checked and re-checked all my connections. What bothers me is am I supposed to be getting 9v peak at 20khz after the 47ohm resistor. The diagram depicts 9v to 0v at 20khz. I have the 20khz at 0.798v at that point. So, which is it.
Confused.....
Here's the Diagram.
Touch Activated Switch
Edit: After giving this some thought maybe the reason it's not working is I picked up my parts without consulting with Doug Johnson. I think his selection of components may be the reason I'm not getting this to switch on. It may also be the reason why the voltages are out and why I don't have the desired 9v to 0v even though my oscillator is working.
On this site which is not the one I got the schematic from, he is selling his small packaged unit "complete". It's comprised of surface mounted components. (
Mine is through hole and voltage rating maybe different )
After further reading on this site I believe it's time to talk to the designer