This bargraph circuit was found in the January 1986 issue of Radio Electronics magazine. It is based on the well-known LM3914 and has two of them in cascade driving a good number of LEDs.
This very high voltage (VHT)generator was found in a 1995 documentation. The transistors must be...
This transmitter for short range in the medium wave range was found in a Raytheon publication from...
This traditional monostable configuration is from a Motrorola documentation from the 70s. The...