Datasheet of This amplifier uses a pair of complementary transistors at the output and can provide 1 W of audio at a load of 3-ohm. Higher impedance speakers can be used. The circuit is from an English publication from 1986 and TR1 can be a | BC548. The supply can be done with voltages from 9 to 18 V. The trimpot adjusts the resting current, which must be in the order of 20 mA.
This simple battery tester uses two transistors to drive LEDs of different colors, indicating the...
The purpose of the circuit shown in the figure, obtained from a 1972 documentation, is to delay the...
This circuit activates an incandescent lamp (or LEDs) when the light stops hitting the sensor, which...
