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This is the 25W Class-A power audio amplifier circuit. The output devices are MJL4281A (NPN) and MJL4302A (PNP), and have high bandwidt... -
This circuit operates an automotive windscreen washer pump to fill a 20-litre drum from a 205-litre water reservoir. The drum is suspend... -
Also suitable for Headphones Operates in conjunction with a DVM.A simple Impedance Meter can be useful to measure the actual imp... -
Useful to listen in faint sounds, 1.5V Battery operation This circuit, connected to 32 Ohm impedance mini-earphones, can detect ...