With the rapid development of electronics, it is unfortunately becoming commonplace to install wireless devices for listening and video transmission in apartments and workplaces. However, even if the operating systems are known, it is not so easy to detect such devices. These devices are very small in size and very similar to the devices we…
It is an application that will be useful for measurements with a multimeter. Measurement is made by drilling 0.8mm or 0.9mm holes in the measuring instrument probes and attaching them directly to the header pins on the circuit boards. Or an unassembled capacitor, resistor, etc. It is used for measuring electronic components. Although there are…
Since I don’t work at very high powers, power electronics, measurement etc. Like many electronics, I use a stone resistor, in fact, it’s healthier to use a metal type shunt resistor, sometimes I wrap it in a shunt resistor. I don’t know how suitable the type of material used for handmade shunt resistors is, I…
A modification to convert an old generation ATX or older AT computer power supply to a 4AH..100AH battery charger. You can add a TL494 controlled module to the power supply and make a high power charger that works very well after a few tweaks. The output voltage of the circuit can be adjusted between 10.6v….17v…
It is very practical to make circuits with a breadboard, especially in circuits with less material. Sometimes I build mixed circuits, but usually simple circuits. In the breadboard experiments, the power supply started to be a problem. It takes some time, especially when 2 or 3 different voltages are required, especially if symmetrical voltage is…
It is a very interesting circuit compared to the combination lock circuits shared before. The heart of the circuit is the button, keypad, etc. for PIC12F675 microcontroller password entry. not used. The system works according to the impacts that occur with the impact. The piezo buzzer converts the magnetic vibrations generated by the beats into…
LCD Panel repair. Connection, information diagrams about COF chip (Chip On Film) repair. COF chips are small chips used in LCD panels to multiplex digital video signals. The diagrams indicate test points for operating voltages. COF faults result in errors such as a blank screen, gradual blackout, or colored horizontal lines. What is usually done…
Amplifier D-class Music power 500W. (RMS 300W) NE5532, IR2184, KNP9120 mosfets. A simple D-class amplifier, based on a modified version. Protection of the amplifier against a short circuit at the output, clipper Limiter. Class Amplifier Characteristics: RMS power: 300 watt Load resistance 4 ohm Supply voltage +63/-63v DC Frequency range: from 5Hz to 80-180Hz (depending…
The designed SMPS charger system uses both constant current and constant voltage charging methods. It can be used to charge classic, gel and traction accumulators with a working voltage of 12 V. It can gently charge deeply discharged accumulators, but also maintain their maximum capacity during a longer shutdown. The charger is able to recognize…
Temperature measurement is one of the more problematic in electronics. Digital output sensors have a very limited operating range and platinum ones are expensive. Inexpensive silicon sensors may be a solution, but coupling them with a microcontroller is not easy. This arrangement makes them much easier to use. The presented adapter is designed to work…