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…
Tone controlled stereo amplifier circuit. You can use TDA7377 or TDA7374 amplifier IC. LM1035 or LM1036 IC can be used for tone and volume control. The cooling fan control made using TL081 op amp contributes to the circuit. Has adjustable voltage output with LM317 to power mp3 player or other audio sources.. The LM1035 (LM1036)…
The PT2314 is a sound processor with a 4-channel stereo input selector, adjustable gain, volume control, frequency loudness compensation and tone control. I implemented the Arduino nano PT2314 project, it works pretty well. 2X20 LCD (LCD2004) is used for the display. 2 buttons are used for input selection mute, standby mode. Menu transitions and other…
The Volkswagen RCD300 tape was in safe 2 mode. To learn the password, 95640 eeprom had to be read and the RCD300 password had to be obtained via the PC program, it took some effort, but I took the password and started the tape. CH341A EEprom Flash Programmer was used to read 95640 eeprom on…
Flash IC is an audio file playback circuit prepared for high-capacity spi flash memory ICs, known as Bios ICs. The controller of the system is the PIC16F628 microcontroller, the spi flash integrated 25Q64 used for memory was removed from an old computer motherboard. I made the circuit application with 25Q32BV, I removed these integrated from…
@ETE Teacher talked about the CR2032 Battery problem of the DS3231 Module in the forum, and the DS3231 module is used in the “Arduino PT2314 LCD, Spectrum Analyzer, Remote Control, Encoder” project, I used a CR2032 battery for the module, but when we use this battery, the battery life is between 1….3 years, normally the…