The circuit shown has a voltage gain of 500 times and can use equivalent FETs like the BF245. The circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook.
This old circuit that makes use of germanium transistors, can be modernized with the use of...
The circuit presented was suggested by Texas Instruments in an opto-electronics manual. The...
This 4-digit digital clock for hours and minutes with CMOS integrated circuits was found in a 1995...