The CA3020 integrated circuit was one of the first commercial types, sold in the 1960s. The circuit presented is from 1968 using a power stage with RCA transistors of the time.
This circuit allows controlling a LASER pointer with an input logic signal. R has 10 ohm for 3 V...
Figure bellow shows how the 4510 can be cascaded for counts higher than 10. The circuit shows the...
This type of circuit is interleaved between a microphone and a transmitter in order to improve the...