Stereo FM Transmitter (CB8459E)

This circuit was found in a 90s Radio Electronics. The FM encoder or multiplexer is an uncommon component today.

TMP468 High Precision Temperature Sensor
April 2017 - Texas Instruments' new high-precision TMP468 sensor can now be obtained from Mouser...
Two Color Sequential (CB4409E)
This circuit using current components was found in an old documentation. It is a sequential circuit...
Battery Saver (CB6336E)
This circuit was found in a 1965 General Electric manual. What it does is give a warning if you...