Sadly, not as many exposed components as I had hoped. I put a pot on the resistor that controls speed. I think that is a capacitor on the left next to the diode but the only thing it does is make a lovely burning smell.
The resistor near the pot seems to control volume.
Any suggestions? For more fun? XD
maybe in first add an output jack, with pot
and often I added a little 555 circuit timer for a vactrol LFO on your new pitch pot
like with this toy, LFO at 1â26
Itâs a bulky white noise generator
Yard sale 20âŹ, one oscillator fixed, one key is missing a register voice, bass pedal is a little dodgy, spring reverb not working yet, all the rest is fine.
It has a selector for the turntable pickup (magnetic vs diamond) If the manufacturer was targeting people who spend money for a moving coil it canât be too bad i think.
So is a radio with a broken antenna. 
Oddly enough, my mixing board has an FM receiver in it. Iâm trying to figure out how to leverage that.
are people still using CB ? I did 40 years ago.
hmm, wait! not moving coil, just magnetic vs the vintage pickups that have a higher output voltage. Not too sophisticated then.
donât remember where this came from . plugged it in and it worked , needs some cleaning but could be interesting .
DONâT hack it, it desserves a proper restorationâŠ
Party like itâs 1972!
And yeah, these pre-Korg Korgs sell for money.
very cool, I have a Minipops 7 in mint condition and could resist modifying it so far but would like to have individual outputs.
to bad it isnât in a little better shape !
At least, with 65Amps (minimum) per rail, you are sure you canât overload themâŠ
But you should check with a scope the âqualityâ (ripple) of the current they provide, they usually arenât great at that, and they donât really need because that 12V will be âdownsteppedâ and regulated on the motherboard.
Any good resources on how to do this for someone who is still learning their way around an oscilloscope?
Connect GND and output to your scope.
Most computer PSUâs will need some load to work correctly.
You have a modern digital scope ?
Just hit the âautoâ button and look at the result on screen.
Look at the display to see how much one division (one square of the grid) is, usually displayed as XXX V/Div or XXX mV/Div. It should also display either min/max voltage, or average and PP voltages.
This will give you an idea of how well it is regulated.
With an analog scope, youâll have to adjust manually the âtimebaseâ, âcenter Vâ and âV/Divâ controls to âzoom inâ on the curve.
feet gate with piezzo ?
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