1940s commercial receiver (T1618E)

This receiver was found in a Radio Electronics from 1949. It is a superheterodyne of the time using 6 tubes.

Complementary Transistor Amplifier (CB908E)
This circuit can drive a loudspeaker with near 1 W of Power from 6 to 9 V supplies. The circuit...
NXH5194 Serial EEPROM Memory of 4Mbit
June 2017 - NXP's new 4 Mbit capacity NXH5194 memories are available from Mouser Electronics...
Pulse Counter (CB10963E)
This circuit was found in a 1987 magazine. It measures the pulse rate produced by a cardiac...