Electronics Electronic Gurus, I Need your help. Macroman, Linear? ANYONE?

ok, so you want me to measure the voltages on pin 7, right? and when I hit the switch on pin 9, grounding it

 

right, but remember, there's two states, and you are toggleing between them by sending in a clock pulse. so the voltage with you holding the button doesn't really count.

 

ok, with me holding the button down, the voltage on pin7 is 62.8mV and without me pressing the button the voltage is flucuating around 2.2v - 3v

and it goes back to doing that after every time i hit the button

 

the voltages change everytime I take them

 

hmmm, this doesn't sound at all right.

What you should see is the voltage should be near zero (68 mV, that's a good example) until you press the button and release it. Then it should go toward 5V, give or take a few millivolts.

Again, the state with the button held in doesn't really matter, it's the state after it makes a transition that I'm interested in. If it's not making the transistion, we need to back up, because you had it pretty much working with just an LED, or so I thought.

 

it was the same with the LED, it would either Get brighter when I pushed the button but as soon as I released it it would go back to being dim

 

I have a quesition?
Why so much work for this switch?
Have you looked for a push-on/push off version of the switch you are using?

 

its to late for me to look for a similar switch

 

yeah, I misread what you wrote in that post--your flipflop isn't working.

 

heres a pic of the voltage reading. it didnt stay at that it was just what it was at when i took the pic, its flucuation



you can see the LED is dimly lit

 

I have another that I could test it with. Ill try

 

im getting the same results with this one

 

hey, maybe a straight-on overhead shot of your breadboard would be useful as well, so I can confirm your connections.

 

I'm going to have you replace the resistor to +5V from pin1 with a straight through wire connection. Then retest.

 

I guess I should also ask, is pin 16 connected to +5V? That's what it needs to be, and I can't tell what's in your various busses.

 

ok, I removed the resistor on pin 1 and connected it to the +5v and pin 16 is connected to +5v and Im still getting the same results

 

Whats CLR on that circuit?

also, im not very familiar with that transistor symbol, where does the base, collector, and emitter go?

 

CLR is a clear input.

If you mean the symbol in Mu's diagram, that's a FET, so it's gate, source and drain.

See if you can get your flipflop to transition by eliminating the switch and pugging a wire from pin 9 (clk) first into ground, then into +5V. Just grab the wire and move it.

 

same results