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  1. SparkyCal

    Capacitor Swap

    Hi guys. i am looking at a circuit that calls for a 47uF capacitor. As it does not specify polarity, i assume it is a film capacitor. The circuit is for a 5th Gear Overdrive. Sorry..i can't find it at the moment. I don't have film capacitors of that size. I do have an electrolytic capacitor...
  2. SparkyCal

    Name them Parts

    Hi folks: A friend of mine gave me some electronical components that he isn't using. He does not know what they are, and neither do i. I have taken a pic of them and numbered them. if anyone knows what they are and their function, please let me know. Don't trouble yourself though. I can resarch...
  3. SparkyCal

    Ground control to major tom

    I have a nagging question about grounding, that I can’t get my head around. I have watched a Few videos and still don’t get it. Here is my dilemma. On a 9 volt battery, I know that the negative pole is ground. On a breadboard, I k ow that the negative rail, which usually runs to a...
  4. SparkyCal

    Op Amp assortment

    I am looking to utilize Op amps to build guitar pedals (distortion, overdrive- things of that nature). I bought some through Amazon and they seem to be defective. Preferably looking for an assortment, and preferably through Amazon. Does anyone have a recommendation/link to such an assortment...
  5. SparkyCal

    Jumper Wires and Breadboards

    I've got a variety of jumper wires and breadboards that came in kits. Most of it is really cheap, nmade in China stuff. The ends of the jumper wires are often shredding, or otherwise falling apart. They are likely factory seconds. Does anuyone have a link to a GOOD quality breadboard and jumper...
  6. SparkyCal

    The Adventure Continues......

    Having declared self inflicted failure on a previous thread, I am starting anew with a new circuit that is intended to create an overdrive pedal for my guitar. I have attached the schematic, and in the process of gathering the parts I will need. I have some initial questions: 1. C2 is said to...
  7. SparkyCal

    A Stretch

    ok...so this next project is a stretch for me, as it is probably beyond my capabilities- but only enough to force me out of my comfort zone. It is a schematic on how to build an overdrive guitar pedal- which i am very interested in The guy who built this was kind enough to forward this...
  8. SparkyCal

    To Short or not to Short- that is the question

    Can someone help me interpret this schematic below My question relates to Pins 2, 3 and 4 on the 555 Timer. Does this schematic require that Pin2 be shorted to Pin 3 and pin 3 be shorted to Pin 4? I am thinking not but I am not sure. Thank-you
  9. SparkyCal

    Technique questions

    These questions are not geared toward any particular circuit, but these issues come uop from time to time, and I am wondering how people proceed: 1. I've built some circuits where a whole bunch of wires, (let;'s say 20 wires), all are to connect to a ground, or to a pin on another component...
  10. SparkyCal

    Circuit recommendation?

    I have finally completed a circuit that lights up a red heart that flashes. Thanks for all of your help on another thread. I am looking to do part two. Part two is as follows: I will be using a 2" X 2.75 " PCB board I will need to spell two first names. And a plus sign in the middle of the...
  11. SparkyCal

    Powering LEDs Question

    Below is a picture of a circuit I am building on a PCB board. I could not figure out how to make the picture bigger, so if it is difficult to see, you can see it full size at. :32 here: You will note that the schematic calls for a number of individual 560R resistors that are attached to...
  12. SparkyCal

    Completed project

    Since I got so much help here, i thought I would post a brief video of a completed project. Make sure you turn up your speakers to hear the sound. https://drive.google.com/file/d/1QUeD6SIO0Elhnb2THn0_zE6xjeCfhZxI/view?usp=sharing I did this on an inexpensive guitar that I own. The circuit...
  13. SparkyCal

    Power supply downgrade

    I have a 9 volt power supply that plugs into the wall and produces 9v DC. Is there any way that i can make it into a 6V power supply. Is it possible to put a resistor before the 9v end, and make it into a 6 v end?
  14. SparkyCal

    Everycircuit questions

    I purchased a copy of everycircuit for my Ipad. I find it to be a great investment for many reasomns; the primary one is because it allows you to experiment with circuit builds without blowing real components up:-) It also helps to learn and appreciate the theory. I have a few questions to...
  15. SparkyCal

    Quick n Dirty answer needed

    Normally, i would research this and ask the question in a more informed way. But I am making a special card for my wife's birthday, and U don't have much time left. I just need to know how to tweak the circuit below, so that it runs on a 9volt battery rather than 5volts. It is project #2 in...
  16. SparkyCal

    0.01uf. 10n capacitor

    I’ve come across many circuits that call for a 10n or 0.01 uF capacitors. I thought I’d buy some but can’t seem to find any on amazon. I have 0.1 uF capacitors but I am looking for 0.01 Does anyone have a link to these? Thank you
  17. SparkyCal

    Question About Something I bought

    I purchased an assortment of electronic components on Amazon. More specifically, this one: https://www.amazon.ca/gp/product/B07F7ZN695/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1 I thought it would be a good deal, and I was particularly interested in the transistors. I was thinking that...
  18. SparkyCal

    A Funny Thing Happened on the way to this circuit

    I created a circuit that utilizes a 555 timer that flashes a bank of blue LEDs driven by a 12 volt battery It works fine. Then I had the bright idea, of creating another bank of LEDs- this time using a yellow LED, and daisy chaining it to the prior LED bank, in series.. My thought was, it...
  19. SparkyCal

    Project question

    I have a little ornament on my guitar that I would likem to light up with 6 LEDS. I'd like for them to automatically liight, when it is dark. I have photo resistors with the specs listed below, but I am understanding that they would have the opposite effect- ie: turn the lights on when it is...
  20. SparkyCal

    Resistor Question

    I bought an assortment of resistors. They are different values, in individual packets- all nicely organized and labelled. Most say 10K or 660 R. etc But one of them says 6K8 what does that mean 68K? 68R? Neither? Thnak-you
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