#operationalamplifier — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #operationalamplifier, aggregated by home.social.
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Electronics idea.
There are opamps with bipolar junction transistors (BJT) in the input stage.
There are others with junction field-effect transistors (JFET) in the input stage.
There are yet others with metal-oxide semiconductor field effect transistors (MOSFET) [1] in the input stage.
Idea: find an application for the bizarre possibility of an opamp with insulated-gate bipolar transistors (IGBT) in the input stage. This is more stunt-designing than anything practical.
[1] IIUC, "CMOS" opamps are really just MOSFET-input opamps. I'm not sure why the process technology name is more commonly used rather than the device type as is universally used for BJT and JFET input opamps.
#OpAmp #electronics #OperationalAmplifier #JFET #BJT #MOSFET #IGBT #CMOS #stunt
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It takes a lot of #chutzpah to sell μA741 opamps for $2 each plus shipping.
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This will be slightly #geeky, and probably only of interest to #electronics hobbyists and #guitar players. I happen to sit in the intersection of that particular #Venn diagram.
When I was a teenager, having only been playing guitar for a few years, I owned a guitar #effects pedal that went on to become legendary - the Boss HM-2 "Heavy Metal" #pedal. Its sound is still ubiquitous in metal.
I don't have it any more. I think I traded it for an analog chorus, which was a seriously expensive pedal back then. Although I have other #distortion effects, I've missed it a lot over the years.
Well, lots of hobbyists build their own effects. And the circuit schematics for many effects, particularly the classics, are available online. So like many others, I decided to build my own HM-2.
This image is the schematic for the #HM2. It's not the most complicated pedal, but it's a league above something like an Ibanez Tube Screamer. As far as active devices go, it's got 6 #opamps and 10 #transistors of various types, along with a bunch of diodes for multiple types and stages of clipping, and the usual jumble of capacitors and resistors. Oh, and four potentiometers.
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#EffectPedal #HeavyMetal #pedals #metal #DIY #schematic #circuit #hobby #OperationalAmplifier #TubeScreamer