Reading time: 2 minute The electronic DIY project presented uses power transistors at the output ("H" Bridge Output Stage), but in the TO92 capsule. The control part, Signal Generation Circuitry, is built with 2N2222 transistors. The speaker, connected to the Output, must have an impedance of approx. 6 Ohm.
Reading time: 9 minute Among the main topics presented in this issue, we list: Linear voltage regulators; Low cost charger for NiCd and NiMH elements; Keyboard with conversion from decimal to BCD; Vu-meter with transistors; Switch-detector for minimum load supplied in alternating current; FM transmitter microphone - for the band 88-108 MHz with a single transistor; Using an LED as a photodiode (light detector); 1W audio amplifier with TDA7052.
Reading time: 3 minute Among the main topics presented in this issue, we list: L6202 / L6203 - DMOS full bridge driver; L293 - Quadruple half-H driver; Monitoring the position of the axis of a motor; Interface for controlling a DC motor; Electronic key with Smart Card (phone card); Proximity sensor with CD4011.