Reading time: 2 minute Although simple at first glance, the application stands out for its originality, a simple adjustment, limiting the maximum current debilitated in the load, in a wide range. The voltage stabilizer shown is a wide application of the LM317 integrated circuit.
Reading time: 5 minute Among the main topics presented in this issue, we list: Measuring the electrical resistance of solders made with alloys without Pb or conductive adhesives; Performance indicator for "burned" fuses; Active switch for supply voltages; LM385 (B) - Precision fixed voltage reference source; Charger for lead-acid batteries (sealed); Balance indicator; Automatic / manual video switch; Speed regulator for AC motors; Sensory electronic switch - Touch Switch.
Reading time: 4 minute Among the main topics presented in this issue, we list: Detector of electrical cables mounted in the wall; Dynamic noise reducer; 13.8V / 3A source with backup battery; Intercom system for 12 stations; Inflatable barrier; AC voltage regulator with PIC16F84;
Reading time: 2 minute Among the main topics presented, we list: Program for designing monostable and stable circuits; Stereo controller; Multican remote control station; AT90S1200 microcontroller; 0-10V DC voltage calibrator; Transverter for 50MHz; MC3357 (Low Power Narrowband FM IF); Portable charger for NiCd batteries.
Reading time: 2 minute The main topics discussed in this issue: Pitesti National Contest 2004; Self-protected stabilized source; Tabs from cell phone history; Coils; Equivalence table for CIS diodes (Russian); Table of equivalence CSI transistors type KT - silicon;
