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Aaron Cram's Apache Ring Modulator
Submitted on October 13, 2004.
Aaron Cram's Apache Ring Modulator for sale on eBay:
Pictures
)
Controls
- Balance
- controls the mix of dry/wet signal
- Offset
- ?
Sockets
- Signal Input
- ...
- Modulation Input
- ...
- Signal Out
- ...
various
- the Aaron Cram's Apache project site:
Description: A ring modulator. Also known as a “four quadrant multiplier.” Send any two signals into the two inputs, and you’ll hopefully get something interesting and very different at the output.
Engineering notes: I built this using National’s LM13700 datasheet as a reference. I added some op-amp buffers and ditched the Darlington. I also noticed that the gain of the amp seemed lopsided, so I tweaked some resistor values until it looked symmetrical on the ‘scope.
Documentation
Reviews
- Harmony-Central (Alfonso Hermida Mod)
Where to find one?
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