This is my first circuit board that I am attempting to build and need a little help. Not exactly sure what is going on but maybe one of you guys could give some input. I am attaching the electrical diagram I am using. Everything thing seems to be working fine besides one thing. When I hook the positive and negative to my 12v supply D1 lights up and D2 blinks every 3.3 seconds and should have an output of 0V-.09V. When I put the positive side of my volt meter on the output and the negative side of the volt meter on my negative post I get nothing. The only time I get any reading is if I touch the negative side of the volt meter with the opposite hand I am holding the output wire on the positive side of the volt meter. Doesn't make sense to me since I have a blinking LED but a reading of 0 on my volt meter. This project is being used for an oxygen sensor simulator.
Here are the component values.
R1 100 K Ohm
R2 1 M Ohm
R3 100 K Ohm
R4 10 K Ohm
C1 4.7 uF
C2 22 uF
D1 1.7v@20mA LED
D2 1.7v@20mA LED
Any suggestions asap would be very much appreciated.
Thank You
**broken link removed**
Here are the component values.
R1 100 K Ohm
R2 1 M Ohm
R3 100 K Ohm
R4 10 K Ohm
C1 4.7 uF
C2 22 uF
D1 1.7v@20mA LED
D2 1.7v@20mA LED
Any suggestions asap would be very much appreciated.
Thank You
**broken link removed**