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  1. SparkyCal

    Lessons Learned and When the Chips Are Down

    I put this project together in a wooden box I bought at the dollar store. This pedal is not going to be used on stage at all. It’s just a project. However, I am getting a terrible buzzing noise which almost overrides the sound. I think this is a grounding issue? as I recall, all my grounds...
  2. SparkyCal

    Lessons Learned and When the Chips Are Down

    Thanks guys. To be brutally honest, it would eb very difficult for me to tackle electronics in a more serious way. If time permitted, I'd love to take electronic course, but my life is such that i have to squeeze time in for hobbies. However, i will be away in a fw weeks for 10 days and i'll...
  3. SparkyCal

    Lessons Learned and When the Chips Are Down

    Thanks guys. @Audioguru- it is the schematic in the very first post. But I don't expect you to hunt it down and I don't know how to link directly tot he diagram. I am in the process of building a modular approach that will enable me to experiment and mix and match opams, diodes and capacitors...
  4. SparkyCal

    Lessons Learned and When the Chips Are Down

    Very informative. Helps me better understand the design
  5. SparkyCal

    Lessons Learned and When the Chips Are Down

  6. SparkyCal

    Lessons Learned and When the Chips Are Down

    Hi guys. @Audioguru. unless I am getting my circuits confused, I believe I already built that circuit. Once I did that (or another that i may have it confused with), I went back to the schematic I posted here, and decided to build that one on a PCB. Two things really helped me breakthrough...
  7. SparkyCal

    Lessons Learned and When the Chips Are Down

    Some of you may know that with the help of this forum, I have finally succeeded in building a guitar overdrive stompbox circuit that was beyond me. That thread is here:https://www.electronicspoint.com/forums/threads/a-stretch.293212/ Here's some of the things that I think I learned, and also a...
  8. SparkyCal

    LED and Switch for circuit

    I built the circuit with Bertus's schematic which placed the capacitors with the correct polarities. I think i will still to an old school switch that says On/Off on it anbd avoid the LED thing altogether, although good to know how to calculate resistor value.
  9. SparkyCal

    LED and Switch for circuit

    Thanks guys. Good to know.
  10. SparkyCal

    LED and Switch for circuit

    Thank-you. How do I figure out the value of the limiting resistor? I know OHMs law. I know the voltage 9V...but I am not sure how to figure out the current
  11. SparkyCal

    LED and Switch for circuit

    As some of you know, I have finally suceeded in building a guitar effects box, thanks to all the help I received here :) This is the schematic I used. https://www.electronicspoint.com/forums/attachments/screen-shot-2020-06-22-at-10-21-12-pm-jpg.48602/ I am now in the process of putting it...
  12. SparkyCal

    Need help interpreting something on a schematic

    Thanks Audioguru. For the moment, all the projects i tackle, are just excersizes for me to build my knowledge level and skill. I've come a long way. although it may not be apparent ;-) as an aside, i am a performing musician. When I play on stage, I hav a small pedal board which consists of...
  13. SparkyCal

    Need help interpreting something on a schematic

    Well, I thought I was using one 9v battery, but I assume I can't
  14. SparkyCal

    Need help interpreting something on a schematic

    Thanks Audioguru. I have a ton of 4558Ds and was lookign for a use for them. i also read this on this web page.https://www.neatcircuits.com/doctor_pedal.htmhttps://www.neatcircuits.com/op_amp.htm The 4558 opamp is probably the most popular audio opamp in most pedals. Particularly the JRC4558...
  15. SparkyCal

    Need help interpreting something on a schematic

    Thanks to you both for the grest insights. I initially thought this would be a very simple circuit to create, as it dors not look like there is much to it. I'm not sure I will tackle this one. It sounds as thoiught there are things missing frommit that you have graciously pointed out. being a...
  16. SparkyCal

    Need help interpreting something on a schematic

    I wonder if you could help me with a few things on the attached schematic: 1. There is the word "Drive" right below the 150k text. Is he simply saying that a 150K resistor needs to be placed there? I am confused because having that arrow pointing down makes it look like a potentiometer. Can...
  17. SparkyCal

    25 PF Capacitor sub

    Thanks guys. i used the 27pF. Bertus, thanks for the article. I am making it a point to go back to this circuit once I compete it, and begin to understand it theoretically. I think that is an important part of my learning. Otherwise, i am simply doing a paint by numbers thing.
  18. SparkyCal

    25 PF Capacitor sub

    I hope I am not driving you folks nuts with my questions. I was at the elctronics store today, so i decided to pick up some 25pF capacitors. They only had 22pF and 27pF. I bought some of each. Which would you think is best to use for this circuit...
  19. SparkyCal

    25 PF Capacitor sub

    It's this same one I have been rebuilding on stripbaord. https://www.electronicspoint.com/forums/threads/a-stretch.293212/page-9#post-1801204. C3 I was able to salvage two capacitors that total 25Pf from another iteration.
  20. SparkyCal

    25 PF Capacitor sub

    A circuit I am building calls for a 25 pF capacitor. There is no polarity shown, so I assume it is a film capacitor. It is a guitar pedal distortion circuit. I don't have 25 pF capacitiors . You'd think with all these kits I bought I'd be able to cobble one up, but I am not sure I can. Does...
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