Bidirectional buffer (CB9317E)

This circuit was obtained in a 90s Electronic Design. The circuit uses components from that time.

Power Beacon (CIR821E)
Only incandescent lamp can be used in this circuit. The SCR must be mounted on a heatsink and...
Sub-Woofer Filter (CB964E)
This circuit originally appeared in a publication of 1997. With the changes, the circuit can be...
Analog frequency meter (CB6906E)
This circuit is from a 1969 Electronics World. The transistors may be modern general-purpose...