brownwhopping wrote:How can I learn by reading threads an making circuits, when some day I can see a lawsuit or somebody beat me in the face for that?
brownwhopping wrote:How can I learn by reading threads an making circuits, when some day I can see a lawsuit or somebody beat me in the face for that?
Nocentelli wrote:Got this on the breadboard at the moment, sounds good. I used a 2N5457 for the input buffer which works fine, and didn't bother with any of the power related circuitry other than the 10k/10k/10uF volateg divider.
I've also got a switch that puts either one or two pairs of antiparallel 1N4148s across the output opamp's inverting input and output, which makes the higher gain settings a bit smoother: The single pair just clips a bit earlier than two pairs. I'll probably use this when I box it up.
I have one question for anyone who understands this circuit: I'd like to use my EV-5 expression pedal for the frequency pot. It's a 10k, and I'm not at all sure what I'm doing, so I just tried reducing the 20k resistor that leads to the freq control opamp by a factor of 5 to match the pot value decrease. However, I just get squeals (through headphones - ouch). I'll have a go at altering those two 10uF caps, but I'm not sure if they should go up or down in value. Any ideas?
PurplePeopleEater wrote:PurplePeopleEater wrote:Here's a PCB layout for the Harmonic Energizer. You can board mount the pots or run wires, whichever. The PCB size is 3 inches x 1 3/4 inches, so it will easily fit in a Hammond 1590BB sized enclosure. I used a TL074 (as in Grizz' vero layout) instead of using 2 TL022 op amps. It just keeps things neater and the sound difference should be marginal at most. It should be correct (Eagle checks connections), but if you see any errors, please let me know.
I forgot to show the board connections on the bottom of the layout. The layout attached below has them marked.
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