Active PFC supported SMPS power supply is made with IR2156 Ballast driver integrated circuit. Active PFC section uses MC33262 active power factor integrated circuit. Output voltage of SMPS circuit on load is 2X40VDC PFC output voltage is 400V There is source PCB drawing of Active PFC Power supply project (sprint layout 6) also MC33262 PFC…
Switched power supply, SMPS circuits can take a long time to repair, continuous measurements are made, electricity is supplied, re-checking, etc. When the input voltage 220VAC is cut off, there will be a voltage between 300VDC….320VDC on the DC high voltage line (in active PFC circuits, it can be 380V or higher) because the filter…
While I was thinking that there is no worse, dangerous, low-quality design for 18650 Rechargeable Li-Ion batteries and chargers, I encounter much worse chargers and batteries. The batteries of the LED Headlamp are completely dead, the charger is extremely low-quality and weak, so I placed a TP4056 module in the charger so as not to…
I made a PCB drawing with the power stage of the TL494 control circuit that I shared in the article “Converting a Computer Power Supply to a Battery Charger”. The PCB size is small and light enough to fit in a toolbox with a thick strip cooler that cannot be higher than 10×10 cm, a…
In the analog soldering station project, a “K” type thermocouple was used for temperature measurement. With the adjustable soldering iron circuit, Quick, Solomon and Gordak brand soldering irons were tested for 48 hours and excellent results were obtained in terms of operating safety and maintaining the set temperature. A 24VAC 60W transformer is used for…
The 40 watt panel with solar energy system has been used for years and has never caused any problems. A simple circuit made with LM393 integrated circuit is used for battery charging and solar charge regulator. The battery used in solar energy system is called deep cycle or leisure battery. It can handle over-discharging compared…
For most people interested in capacitor discharge ignition, the repeatability of DC-CDI is difficult and they have little experience with winding transformers. This design uses an AT-ATX PC power supply transformer for voltage conversion. There is no need to wind the transformer. The necessary transformer can be obtained from old-style PC power supplies. TL494 or…
I don’t know about ultrasonic welding for plastic, but there are projects that can be useful for those who are interested. The appropriate ultrasonic with sufficient power in the application is 60W at 68kHz, disassembled from an ultrasonic cleaner. A lower frequency is more suitable. PVC welding The ultrasonic transducer behaves approximately like a series…
I prepared a PCB for the Simple Switch Mode Power Supply Self Osc ATX Transformer that I shared before. It is compatible with the battery boxes of many drills. Apart from the PCB design, the tests were very challenging, I encountered interesting problems and saw strange events especially in electronics repair work. The problem of…
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,…