This preamplifier for phonographic capsules using FET was found in 90s American documentation. Consumption is very low. The power can be obtained from the amplifier circuit with which it works.
This circuit obtains phase-inverted signals from a single signal. The circuit uses two LM741...
This circuit was found in a 1963 magazine. The magazine no longer exists, but the circuit can be...
a This circuit was obtained from a 1978 Practical Wireless. It causes a low-power 1.5V lamp to...