Portable-amplifier


Posted on Jan 18, 2013

Ul, an FET op amp needs a bipolar voltage atpins 4 and 7 with a common ground for optimum gain. You can calculate the gain by dividing R2 by Rl. Zero-set balance can be had through pins i and 5 through R3. Put a voltmeter between pin 6 and ground and adjust R3 for zero voltage. Once you`ve established that, you can measure the ohmic resistance at each side of R3`s center tap and replace the potentiometer with fixed resistors.


Portable-amplifier
Click here to download the full size of the above Circuit.

R6, R7, RS,and C3 forrn a tone control that will give you added bass boost, if needed;




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

18W Audio Amplifier
Microprocessor triac array driver
4-Channel Mixer
Electronic Communication Projects
temp control fan hardware
Telephone Ringer
pulser 15hz 30khz zapper circuit
Strobe Flash Light Circuits
Home Automation through Cellphone Keying



Top