Wednesday, November 17, 2021
Answers
Questions
"Questions" is part 1 of a 2 part novelty "wireless" transmitter and receiver circuit and will not function by itself, it must be paired with the "Answers" circuit (shown in separate post). I initially discovered this circuit(s) on a random diy forum, it was originally posted by a high school teacher from Australia and I'll be damned if I can remember the fellows name. All in all a good step into the world of wireless.
Radio(active) Fuzz
This is a unique and interesting fuzz circuit I found deep in the depths of the aronnelson archival website. The main IC is an AM/FM Radio chip and is used/abused to make a wide range of fuzz tones. Full blown silicon, gated velcro, 8bit, bitcrusher, and just general noise. The original designer left the project unfinished and with a few different modifications, I started with his schematic on breadboard and just experimented from there with values and a few other mods. These chips are still available on ebay and there's also several others in the same family that more than likely have an equivalent pinout. I encourage some more modifications and experimenting.
Sunday, October 24, 2021
ReValver
Have you ever been playing your favorite pedal, or any pedal for that matter, and thought to yourself "gee, this sure would sound better with tubes"? Well with the ReValver now (almost) any pedal can have a tube! I say 'almost' as I've tried all my pedals and while they all work, not all sound great. I tore apart Matsumin's ValveCaster circuit and did a little experimenting. Essentially adding a send and return into the middle of the valve circuit, injecting whatever effect into the 12au7 and adding that "warm" tube sound to say a...fuzz or a....delay.....or a flanger...etc.
Tap On Tap Off True Bypass
Ruby Amplifier
Not the greatest little practice amp but it's a cool project nonetheless. Only capable of roughly 1/2watt it's best suited for small speakers, large speakers will work too however. Low parts count and a quick build. Originally designed by RunOffGroove as an updated version of their "Little Gem" amplifier. I needed this when I was trying to design the layout for the "What Goes Up Must Come Down v1".
Tuesday, October 19, 2021
12 Over 2 Equals 6 Point 3
This is an almost useless circuit, at least to me anyways. I needed 6.3v for a tube project I was working on at the time and this was my way of getting there. While it does provide 6.3 volts I unfortunately failed to read the specs of the tube's heater draw and this method (LM317) ultimately doesn't give enough amperage for what I was doing. Lesson: always read the datasheet.
Piggyback Pair
Germanium transistors are becoming more and more scarce and the ones that you do find aren't great options for the classic fuzz circuits...
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The ISD1820 voice recording IC has gained some popularity recently and has popped up in a few other cool projects and guitar effects. This o...
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The ISD1820 Record/Playback IC has seen a resurgence in use the last few years. MidFi Electronics released his Propaganda Machine, Parasit S...
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Have you ever been playing your favorite pedal, or any pedal for that matter, and thought to yourself "gee, this sure would sound bette...