Current Electricity | Electricity and Electromagnetism | PHYSICS A
A. “London” Operational Amplifier
The “London” Operational Amplifier has input devices such as an LDR, microphone input, 100k potentiometer and 1µF capacitor. There are 6 resistors with space for an additional component. An offset control is included, plus a 1A power amplifier for loads eg. a loudspeaker, motor or lamp. A Wein network is included. Output can be fed through the power amplifier into a loudspeaker.
Arranged with 5 input resistors, 2 feedback resistors and capacitor, all selected by plug-in leads. An offset control is also fitted. 2x 10k potentiometers allow input voltages to be varied continuously. Regulated power supply between ±5V to ±15V is required.