This integrated amplifier was found in a non-existent British magazine from 1975. The used integrated circuit is still popular and the mono bridged version can provide 36 W output power. 4 A.
This Wheatstone bridge has a thermistor or NTC sensor, allowing the measurement of temperatures by...
This high power dimmer uses a unijunction transistor to trigger the triac. The triac is choosen...
Two LEDs are used in this TTL circuit. Frequency is given by C1 and C2. Power supply must be a 5 V...