This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...
daptation of a common multimeter for the measurement of high voltages with high input resistance,...
The Texas Instruments LM5178 Buck-boost controller is capable of operating in the 4.2 to 55 V (60...