ABOUT TECHNOLOGY AND ELECTRONICS-DIY
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Reading time: 8 minute The article presents the top 10 types of resistors that offer high reliability and stability or high temperature performance for a wide range of applications. These resistors are designed for harsh environments, including automotive and industrial applications.
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Reading time: 8 minute The article presents the top 10 types of resistors that offer high reliability and stability or high temperature performance for a wide range of applications. These resistors are designed for harsh environments, including automotive and industrial applications.
4,185 total hits, 9 hits today
Reading time: 2 minute A supercapacitor is also known as a two-layer ultracapacitor or electrolytic capacitor. Supercapacitors consist of two electrodes, an electrolyte, a separating membrane, and their performance differs depending on the characteristics of the materials used.
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Reading time: 3 minute The article presents in a structure classified by quality levels, types of capacitors used in consumer power sources (PC, TV, appliances, etc.). The purpose of this article is to provide detailed information about the most important part of an electronic equipment, its power supply unit.
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Reading time: 2 minute With a height of over 2 m, a weight of 1500 kg and an impressive design, it looks more like a futuristic teleportation device than a power amplifier. Its beauty is matched only by specifications. In the construction of this applicator, some more special materials were used, such as: aeronautical quality aluminum and gold.
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Reading time: 5 minute The most critical security issues for IoT environments are those regarding the protection of the privacy of data generated by interconnected devices and transmitted over IP networks. Therefore, security solutions must address these issues as a matter of priority.
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Reading time: 3 minute A proficient and visionary inventor, the creator of the flying backpack, an idea taken over by NASA for the intercapsular movements of cosmonauts, and of the car that consumes 0,5 liters per kilometer, Justin Capra tried to break down barriers and mentalities.
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Reading time: 3 minute During World War II, Bletchley Park was the headquarters of the UK's leading cryptanalysis organization. The codes and figures of several Axis states were deciphered here, the most important being the German Enigma and Lorenz cars, owned by the Government Code and Cypher School (GC&CS), which regularly entered the Axis Powers' secret communications.
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Reading time: 4 minute The BC107 family, 108, 109 in the TO-18 metal capsule, has been produced worldwide since 1965 by Philips, Siemens, AEG-Telefunken, SESCOSEM, Texas Instruments, Motorola, Fairchild, SGS Thomson and IPRS Baneasa. After 1975, similar and equivalent transistors were manufactured in plastic capsules, at a cost price 20-40% lower.
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Reading time: <1 minut This catalog shows the significance of the various markings and inscriptions on the surface of the non-polarized and polarized capacitors. Capacitor marking can be done in 3 ways: using numbers and letters, only with numbers and using the color code (this notation has not been used for several years).
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Reading time: 3 minute Gogu Constantinescu is the Romanian engineer who laid the foundations of the sonicity theory, and the one whose invention can be said to have helped British aviation to tip the scales in its favor during the First World War.
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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.
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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.
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Reading time: 2 minute The color TV that was to be manufactured at Electronica in 1983 consumes less than 100W from the mains and works freely at mains voltages between 150V and 250V. In this way, the design ensures that an essential task for the national economy and for the remote owner is achieved: energy saving.
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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.
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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.
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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.
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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.
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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).
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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.
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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.
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Reading time: 7 minute At IPRS Baneasa, the first NPN transistors (BC17x family) were developed by eng. Nicolae Camen and the first PNP transistors (BC25x family) by eng. Sorin Georgescu. The article contains the technical characteristics of all BC17x and BC25x transistors.
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Reading time: 2 minute The NPN 2N2222 transistor is used in applications that require amplification of low currents and low or medium voltages. The article also contains macro pictures inside the transistor capsule produced by Motorola, ITT Semiconductors, CRP Industries, IPRS Baneasa and National Semiconductor.
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Reading time: 3 minute Point diodes (like EFD108) can be considered the "ancestors" of Schottky diodes. They used to be called "Schottky microdiodes with germanium". Although constructive differs a lot, the operation is very close, the opening threshold is lower than the PN junction diodes with germanium (approx. 0.2V) and they do not have that "steep bend" in the opening area of the junction diodes.
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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.
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Reading time: 2 minute A cheap charger for charging batteries with Ni-Cd or NiMH elements is easy to build using the 555 timer and a few transistors. Charging is done quickly, and the electronic scheme ensures the elimination of the unwanted memory effect in NiCd cells.
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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.
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Reading time: 3 minute The presented speed variator, destined to supply the mini-drills for drilling or milling the wiring, offers a wide adjustment range and a high torque at the motor shaft. The assembly is simple to do, the article presenting detailed indications for operation and assembly.
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Reading time: 2 minute The classic "bell button" (simple return switch) can be and even is replaced, in many mini-automation assemblies, with a resistive sensor (touch). The example described in the article illustrates this "replacement" in the case of a common multivibrator circuit with transistors, used as a bell.
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Reading time: 3 minute Unlike traditional solar panels, organic cells offer the possibility to be printed directly on materials such as glass, brick, paint, tile, etc. Printed solar panels will have low production costs, light weight and high flexibility.
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Reading time: 6 minute The SIMATIC automation system is represented by components coordinated with unitary methods of configuration, registration and data transmission. The programmable controllers of the SIMATIC family (S7) represent the basis of the automation system.
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Reading time: 5 minute The emulator is a high-performance solution for developing microcontroller applications. If in electronics without microcontrollers the oscilloscope is used, in applications with microcontrollers the circuit emulators are also used. It is the most efficient way to see what is happening inside the microcontroller.
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Reading time: 3 minute The course presents the circuits known as FPGA (Field-Programmable Gate Array) and CPLD (Complex Programmable Logic Device), respectively, with a focus on the circuits of one of the representative manufacturers of such circuits, Xilinx.
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Reading time: 4 minute Buttons, switches represent the way in which the user controls the operation of the electronic module (ECU). An ECU must have a block dedicated to taking over and interpreting the signals obtained from the buttons.
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