This circuit of an EDN divides the input pulse frequency by even values. The circuit is TTL and can be used as a shield for microcontrollers.
The LDO series (Low Dropout) TPS80 from Texas Instruments (www.ti.com) can provide output voltages...
This circuit was obtained from Raytheon documentation from the 1960s. The transistor is one of the...
This circuit was found in an English publication in 1986, but it can still be implemented by...