5.1 Control board project for sound system. Remote control, LCD, Encoder. I have almost no application with Arduino, I always tried to use Arduino alternatives and somehow found circuit solutions. But audio applications always intrigue me. I applied the digital volume control Arduino project made with Arduino Nano PT2323 and PT2322 audio control ICs, the…

In applications for external starting of the washing machine engine, the biggest missing torque is the lack of power control, starting the engine by applying direct voltage only provides speed, and the engine stops at the slightest strain. There are circuits using the TDA1085C universal motor speed control integrated for full control. TDA1085 is an…

A more powerful and advanced automatic Battery desulfurizer circuit as an alternative to the “Battery Repair Desulfurator Circuit” project. The circuit is used to dissolve the sulfate on the battery plates. If you ask what the desulphator feature is, it is stronger than other circuits, has high, low voltage and overheating protection and can be…

It is a more powerful version of the “Mosfet Electronic Load Circuit LM358” project I shared, with 4 mosfets. When I got the 2-Mosfet circuit close, I did not bother to repair it. I prepared and applied the PCB drawing of the 4-Mosfet circuit. It is a clone of the product sold as a circuit…

“Cleaning the Desoldering Pump” was one of my duties during my apprenticeship years 🙂 Even though I don’t clean it as thoroughly as in those days, it still works. Note: You can obtain the plastic part used to protect the pump tip from the EHT transformer of tube televisions and monitors. The bottom part of…

A simple electronic siren circuit using the adjustable regulator integrated LM317T. Sound is produced with a 384 Hz square wave that oscillates approximately 9.8 Volts peak-to-peak. The RMS power of the siren is around 2W. It is recommended to use 8-OHM 5W speakers. The siren contains a power generator and a repeater that converts the…

A simple but useful and stable circuit. In this state, it easily operates a 50W lamp without needing cooling. Of course, it got a little hot in my 100W experiments by connecting another one in parallel, but we can solve this problem by extending the length of the PCB a little and expanding the cooling…

It is actually a simple circuit that makes a flip flop with three different opamp types. The PCB design of the elector is slightly different and the sockets used for testing are assembled using solder. I made a new PCB drawing that collects all the elements on the mounting face, so we have nothing to…

A simple battery discharge protection circuit implemented with TL431, BC557 transistors and a small number of resistors. The power line is controlled with an N-Channel MOSFET instead of a relay, so its current consumption is lower than the relay. The protection circuit triggers the MOSFET and gives output around 13.6V, and cuts off the output…

A project using RFID-RC522 module and PIC16F628A to perform access control with RFID Key cards. Adapted from Arduino “AcessControl” software. The PIC16F628A software is written in CCS C to work without SPI hardware. The RFID-RC522 module performs the entire radio frequency communication process (13.56 Mhz) with RFID tags. An RFID tag is an electronic tag…

The TDA2030 Bridge amplifier can be used with a single source power supply. Working voltage DC 12V…. It is between 32V and can be operated with 12V battery, 24V battery, SMPS adapters or transformer power supply. (power of the voltage source according to the output power is 50W…60W) The principle of the TDA2030 Bridge connection…