Hi ,


I've done this with a dozen different circuits, and none of them work.

I have a pkg of 10 NE555's tested 7 of them in a lot of the circuits I put together, I have 3 left (555's) that I haven't taken out of the pkg yet.

Don't know if the whole batch is bad or I just am doing something
very wrong....

I ordered what I think is a 555 test module from ebay, don't know if that
will help.


Edit: ASTABLE



...

 

Ok whats the circuit your making, have you got a breadboard jig?

 

Ok whats the circuit your making, have you got a breadboard jig?

I've been using a breadboard.

So many circuits, I don't know where to start, I think I'll youtube a
'breadboard 555' query and copy someones exactly and see if that
will show me anything.

Also wonder if the whole batch could be bad, and if I need to wear
a wrist esd strap, thought there's not mutch statice this time of year
here.

 

I've done this with a dozen different circuits, and none of them work.

Take a deep breath, slow down, and show us ONE of the circuits. Tell us what the goal is (the schematic you are following), and show us a good picture or 2 of your build. Don't forget to describe your power supply.

You can find horror stories about counterfeit ICs out there, but I would estimate the odds are very low of that being your problem. It's much more likely some simple mistake that a second set of eyes will help find for you.

 

Take a deep breath, slow down, and show us ONE of the circuits. Tell us what the goal is (the schematic you are following), and show us a good picture or 2 of your build. Don't forget to describe your power supply.

You can find horror stories about counterfeit ICs out there, but I would estimate the odds are very low of that being your problem. It's much more likely some simple mistake that a second set of eyes will help find for you.

Dead Camera.

 

Tell us what the goal is (the schematic you are following)

Don't forget to describe your power supply.

Do you need a camera to do this?

Simply writing "Dead Camera." is going to solve nothing.

 

Here's a simple test circuit for 555.

Good 555 = blinks

 

Something I'd like to point out--if your resistor values or capacitor value is too low, the LED will blink so fast you won't be able to tell it's blinking--it'll just look like it's constantly on. Use the circuit inwo posted. However, 1k and 10k resistors with a 10uF capacitor will cause it to blink at around 7Hz, which may be too fast for you to tell, depending on how good your eyes are. I suggest using a 10k and 100k instead of the 1k and 10k respectively. this will blink at 0.7Hz, which will be much easier to see.