This 10 kHz filter was obtained from an article in Electronics Now magazine in February 1995. The power supply is dual and other equivalent operating conditions can be used.
We find this circuit in the 80s used integrated circuit manual itself. The integrated circuit is not...
This good power amplifier was found in a Japanese magazine from the 1970s. The circuit uses...
We found this circuit in a 1983 English magazine, but it can be easily assembled with the BC548 or...