This circuit is from a 1967 US publication. The configuration can serve as a basis for designs with modern components.
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...