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Ok, that is rock solid in between, However, from zero to peak it slopes upward?
Edit: I'll bet, I've damaged the 4069's somehow. I know I didn't hookup the Vcc on one of them, who knows what I did.
Gotta head out I'll be picking this up at the house after dinner.
Thanks SV
Cheers.
So, I did hookup the Touch Sensor circuit. I tried to check it for any response by hooking up the probe to it. Every setting didn't seem to render a response. Although when I touched the side of the exciter input I got a response that looked somewhat like the exciter waveform.
Edit: Now if I can get the MOSFET and Relay in tomorrow. The relay I want to use is because I have one
http://www.nteinc.com/relay_web/pdf/R74.pdf
Do I need to use a regulator off the 9v supply or just a resistor to power the relay?
Edit:Edit I just found this roaming around to see if someone else tried this circuit, interesting read.
Capacitance Proimity Switch Technology -Dave Johnson and what I didn't find before I started this Journey
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
Are you talking about one of the two diodes connected to the exciter output?Ok, I have the 20khz and feeding the 2907 to the receiver and have a relay fed with 5v supply.
My main question is in the diagram, what is the 9v with the cathode of the diode facing it going to other than the supply ?
Shouldn't it be facing the exciter. Is that a mis-print ?
I'm in the meeting. Now the qeustion re
ians am I supposed to have 9v to 0v at the exciter?
Roughly. it might be only 1V to 8V, or something like that.I'm in the meeting. Now the qeustion re
ians am I supposed to have 9v to 0v at the exciter?
SV said:The line drivers are what brings the signal strength up to 9 volts. So make sure you have 9 volts going to the supply pin of the line driver.
Roff said:Roughly. it might be only 1V to 8V, or something like that.
Dave Johnson said:The circuit produces a signal which powers multiple signal transistor touch switch circuits with a 20KHz signal which resembles a sine wave. Note the ICs being use. The CD4069 is a pretty common part. The circuit acts as a buffer which takes the square wave 20KHz signal and generates a triangle shape signal.
SV said:you should be reading an average of 4.5 volts.
The cap on the receiver won't affect the exciter.Line drivers? are you referring to Vcc on Pins 14 of the chips yes. 9v
I checked and double checked it.
So, then If I remain at the 0.798v maybe their is a current problem or something. I am using a .049 cap on the Mosfet receiver that I pulled out of a TV because I didn't have one, don't know it that will affect it or not.
I forgot, so today I'll be heading over to see if I can get a ceramic one.