Help needed trouble shooting IC Based Overdriver circuit

[Guitarist335]

Thank you

[Guitarist335]

please ignore..posted by accident

[duck_arse]

Guitarist335 - please, do me a favour. get one of your IC's out of its socket. get your multimeter on Ohms range. put one probe on pin 4 of the IC, and the other on pin 1. what reading?

now put one lead pin 4 and one lead pin 5. what reading?

finally, one lead pin 4 and one lead pin 8 - what reading? NOTE: this may prove nothing. IC out of socket or board, or one spare from your bag. which colour probe to which pin DOESN'T MATTER! exactly what the meter displays, please.

thank you.

[antonis]

Without powering circuit..
(Stephen is aged enough and forgets things sometimes..)

[Guitarist335]

Thank you. I ended up retiring the circuit using regular wire, rather than the magnet wire. Once I did that, everything worked.  What I hadn't realized is that the magnet wire is prone to break some of its insulation once it rubs against contact points in other runs. Lesson learned. Thanks for all the advice. I picked up on the wire issue once it was pointed out on this forum. 

[antonis]

I picked up on the wire issue once it was pointed out on this forum.

The time for smashing pointer's head reached..

[duck_arse]

Without powering circuit..
(Stephen is aged enough and forgets things sometimes..)

what's that? who's talking?

okey dokey, at last. you can ignore my wanted meterings, it's just that I could not see any markings on the IC in yer pics, was wondering if you'd been stiffed with duds.

carry on! oh, but wait - NOW, measure all those voltages on the IC for us, let's see what you get.

what's that string?

[Guitarist335]

Pin 1. .0025
Pin 2.  4.434
Pin 3. 4.214
Pin4.  0
Oin 5. 0
Pin 6. 4.457
Pin 7 8.87
Pin 8   0

Do those readings square with what you would expect?

Sorry, I beleive on this thread or another, someone, I believe the gentleman from Greece, posted a pic of my connections and suggested that the connections using the magnet wire may have been an issue. So, I took his advice and changed the wiring and it works now. I was saying thanks to all for the help.

[antonis]

Readings are more than fine..
(remember them for future use of a single op-amp working with +9V single supply..)

[Guitarist335]

Good idea. Thanks

[duck_arse]

just ignore my gibber, it's directed at that man from greece.

so we now know your volts are right, and you measurings are right, and your circuit is right. see how easy it is?

[Guitarist335]

Actually, it has been great. It's rekindled my interest in electronics. The thing that made the difference is the suggestion that the magnetic wire may be an issue, and teaching me how to use the multi meter.

For example, i went back to work on another circuit that i built a thousand times and could not get to work. After learning how to use the multi meter probes here, I was able to quickly detect that the voltage divider circuit was wired wrong and was not transmitting the correct voltage. Once I changed the connection, it worked,