A simple battery charger using the LM317T three-terminal voltage regulator. The maximum output current of the LM317T integrated circuit, which is 1.2 A, is increased by the power transistor (BD912). The maximum output current of the charger is limited to approximately 5.3 A by the R4 resistor. Since there was no 0.55-OHM ready-made stone resistor,…
The aim is to make a simple and at the same time effective device that will count the number of people entering and exiting rooms with a single entrance door. The detection was carried out with Sharp GP2Y0A21YK sensors, based on the use of infrared distance sensors for security systems. These sensors work at short…
There are interesting projects but I don’t think most of them will be implemented. For this reason, I touched on PCB, Schematic designs. Especially power electronics studies can be useful for you and you can get inspiration. Some projects have also been made with large, detailed PCB designs. Sine controller for brushless motors. 24 cells…
For the circuit; It is called “Universal power control”. A circuit that reduces the brightness and therefore the power consumption of the energy saving lamp as a night lamp. It is not recommended to use simple dimmer circuits to change the brightness of these lamps. In the electronic ballast circuits used in energy saving lamps,…
I did the time test of the Advanced Battery Desulfurizer Circuit circuit that I shared before with a 12V 60A Car battery. I will keep the desulfurizer connected to the battery for 1 month but I wanted to share the first result, I got very good results in about 1 day of desulfurizer connection, it…
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…