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  1. SparkyCal

    A Little Delayed in Starting

    Thanks Bertus. I just t=noticed, I thought I had 4 of these chips, but on closer look, it came with two chips and two sockets- so I should be good. Good to know for future reference though.
  2. SparkyCal

    A Little Delayed in Starting

    I don’t have a socket for this chip. Is it possible to place two 8 pin op amp sockets together to act as a 16 pin socket?
  3. SparkyCal

    A Little Delayed in Starting

    Thanks Bertus. While I can’t pretend I understand what each component does, the explanation on Peter Vis’ site provides a good idea of how things interrelate and play a role within the chip and in the circuit. I will read it again. It’s helpful. I did t know you can have a digital and analogue...
  4. SparkyCal

    A Little Delayed in Starting

    I am starting a delay circuit for my guitar pedal, thanks to the nudge from VB. I received the PT2399 Chip ( actually, I have 4 of them). I am tempted to breadboard this first, but breadboarding. gets a little hairy- especially with all the wired and stuff. So, I am considering simply going to...
  5. SparkyCal

    Just When I Thought it was Going to Be Easy

    I am starting a new thread for this project.
  6. SparkyCal

    Just When I Thought it was Going to Be Easy

    @VB. Ok. I ordered a few
  7. SparkyCal

    Just When I Thought it was Going to Be Easy

    Do you have a straight forward schematic I can look at?
  8. SparkyCal

    Just When I Thought it was Going to Be Easy

    Here is a pic of my in progress build. It is all built and it works. I am just glueing the LED in the steel box and letting it dry. But I thought I'd post this to let you see how small of a PCB board I am now using.
  9. SparkyCal

    Just When I Thought it was Going to Be Easy

    Hi guys. I did the fix and it worked. Thank-you for your advice and support.
  10. SparkyCal

    Just When I Thought it was Going to Be Easy

    ok..I will try that when I get some. time and report back. Thanks
  11. SparkyCal

    Just When I Thought it was Going to Be Easy

    Thanks guys for your help and encouragement. I believe that in the picture above, (the one on thread #91) the pin marked positive is actually negative. Treating it as such, gives me a proper positive 9 volts when I run that lug with the bigger base as negative and the one marked negative, as...
  12. SparkyCal

    Just When I Thought it was Going to Be Easy

    I used a dc barrel, not a battery. I’m not including a battery clip. The op amp is in a socket. So if it’s the only thing that is damaged, should not be a problem. But I need to know what to do, and then understand it. I tried it the other way around and it did not work out. In other words...
  13. SparkyCal

    Just When I Thought it was Going to Be Easy

    well, I tried and I thought I had it, but it did not work and I may have blown the circuit. I noticed that the centre pin was now the inverse, so I switched the positive leads to negative and visa versa. Failed.
  14. SparkyCal

    Just When I Thought it was Going to Be Easy

    Thanks VB...ok..because I got this whole circuit built, and I don't want t take a chance and fry it, what do I have to do to make sure the DC barrel's lugs are connected properly? My inkling is to reverse the wiring, but I don't want to fry the circuit if I am wrong.
  15. SparkyCal

    Just When I Thought it was Going to Be Easy

    I am not sure what is happening here. I built the same old circuit, this time using a TL072 op amp. It worked perfectly. Then, I received some plastic DC barrels (these ones to be precise). https://www.amazon.ca/gp/product/B096XJWZJQ/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 I built...
  16. SparkyCal

    On the Bench

    Sorry..deleting this thread as I now realize, that I have already posted it on this site.
  17. SparkyCal

    Is this possible to do?

    Thank-you. I have out this on my list of things to get to.
  18. SparkyCal

    Is this possible to do?

    Great video.
  19. SparkyCal

    Is this possible to do?

    Thought more about this. As the voltage changes when the phone is off hook, I probably need only one resistor to the + lead, but it has to trigger a different colour when the phone is picked up. It doesn’t matter to me which colours but I’d prefer blue and red.
  20. SparkyCal

    Is this possible to do?

    So, is this a matter of splitting the + lead three ways and giving each lead a different step down resistor according to Ohms law? I want to be careful cause I only have one of these.
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