Reading time: 3 minute The article presents two mounts that can be used as "mini" beacons. One of the fixtures is powered by a 12V source and uses a halogen bulb as the light source, and the other assembly is powered by 9V and has as light source two series LEDs.
Reading time: 2 minute The electronic circuit shown can be used in households and facilitates the on / off switching of the light bulb in the room, for example, using the remote control of the TV, DVD or any device controlled by an infrared remote control.
Reading time: 2 minute The electronic DIY kit presented is a simple and cheap bathroom lighting machine. The light turns on automatically when the bathroom door is open and stays on when it is open again, the lamp / LED going out after a short delay.
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: 3 minute The DIY kit shown is an AB class audio amplifier that uses the BA5406 integrated circuit produced by ROHM. Easy to make, with only a few electronic components, it can connect without problems to most signal preamplifiers or to the output of sound cards from the PC, its input impedance being high.
Reading time: 4 minute MAX712 (and MAX713, with very small differences) is a specialized integrated circuit for fast charging of NiCd or NiMH batteries from a direct current voltage source. From 1 to 16 elements (1.2V) connected in series can be charged, their number being programmed by hardware.
Reading time: 2 minute Comfortable and quiet, without introducing electrical noise in the assembly, compared to an analog potentiometer, the digital potentiometer presented is made with integrated circuits for general use (non-specialized).
Reading time: 2 minute There are many applications that require a simple, inexpensive and reasonable power amplifier for portable circumstances (trips). The TDA7052 is a very easy to build, battery-powered power amplifier with decent power for its size and simplicity. The article contains two construction variants of the 1W amplifier.
Reading time: 2 minute The installation presented is a simplistic one, its purpose being light detection and familiarization with the operation of operational amplifiers. The electronic circuit is based on the TL071 / LM741 IC and uses a 5V differential supply.
Reading time: <1 minut Static relays are used to control (switch) without risk the consumers of AC power supply to the 230Vac network, in dangerous environments (with danger of explosion, for example, due to the electric arc produced by the mechanical contacts), static relays are used.