Subject: Simple LFO... in ASCII (Heh heh) |---------------------------------------------| | |----||-| | | | |\ C | |\ | |---/\/\/----+--|-\ | |---|-\ | R1 | |-+--/\/\/--| GND | |--+-----o Square |--|+/ | R2 |--+-----|+/ | | |/ | | |/ | GND | | | o |--/\/\/----| Triangle R3 Legend: ------ + = Circuit connection | = Vertical trace - = Horizontal trace GND = Ground connection C = 2.2MF (or 0.01 to 2.2MF dependant on frequency requirements) R1 = 100K pot R2 and R3 = 10K to 100K, with R3 at least 1.5 times the size of R2 (IE: If R2 is a 22K resistor, then R3 can be a 47K) The op amps can be any op amps, for your stated frequency requirements.