This circuit for dual-gate MOSFET was found in a 90’s Popular Electronics. The coils are according to the frequency range that must be amplified.
With the circuit shown, when the brightness of one lamp decreases, that of the other increases. There is...
We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is...
We find this battery charger in a 90's Hands-On Electronics. The charging current is 2 A and when...