Variable audio oscillator 20hz to 20Khz


Posted on Feb 25, 2013

To obtain a 1000:1 Sweep Range, the voltage across external resistors Ra and Rb must decrease to nearly zero. This requires that the highest voltage on control pin 8 exceed the voltage at the top of Ra and Rb by a few hundred millivolts. The circuit achieves this by using a diode to lower the effective supply voltage on the 8038


Variable audio oscillator 20hz to 20Khz
Click here to download the full size of the above Circuit.

The large resistor on pin 5 helps reduce duty cycle variations with sweep.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Siren alarm simulates star trek red alert
Period-To-Voltage Converter
Phase Shifter With Eight Outputs Circuit
Would this USB detection circuit work as expected
Hall Effect Sensors Magnetic Field
raspberry pi vu meter
distance measuring sensor
The Bean-Counter AM Transmitter
LMD18200 motor controller electronic project
Mini Split Acs
Single-Shot Auto-Charge Flash Circuit
LED fast optical pulse generating circuit diagram



Top