Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz. The circuit has a gain of approximately 30 dB. Bipolar transistors are general-purpose types.
We found this simple music box circuit that can also be used in a musical bell in a 1991...
This circuit was found in the September 1984 issue of Radio Electronics magazine. The frequency is given...
Found in a 90s Maxim documentation, this circuit disconnects the battery in case of overload. The...