TREE

On different forums, I often find people asking for help in calculating the required turns for a ferrite transformer they are going to use in high-frequency/SMPS inverters. In a high-frequency/SMPS inverter, the ferrite transformer is used in the step-up/boost stage where the low voltage DC from the battery is stepped up to high voltage DC. In this situation, there are really only two choices when selecting topology – push-pull and full-bridge. For transformer design, the difference between a push-pull and a full-bridge transformer for same voltage and power will be that the push-pull transformer will require a center tap, meaning it will require twice the number of primary turns as the full-bridge transformer. Calculation of required turns is actually quite simple and I’ll explain this here. For explanation, I’ll use an example and go through the calculation process. Let’s say the ferrite transformer will be used in a 250W inverter. The selected topology is push-pull. The power source

Valid schematic circuit diagrams of fluorescent lamps with a voltage source using 12 volt battery. This circuit 12 volt fluorescent lamp is very useful if the power goes out or can be used in a dark place with no electricity , but can use  the battery 12V . This 12V fluorescent lamp circuit i have tried and the results are bright , durable until decades. You can use 12Volt fluorescent lamps up to 40W . Use quality 12 Volt fluorescent lamp, do not use the fast heat , because the fast was also damage the transistor at 12Volt fluorescent lamp circuit . Do not occasionally mistaken in putting up the transistor . Description for 12 volt fluorescent lamp Circuit Diagrams : R1 = 220R/0.5W R2 = 1/0.5W C1 = 100n/100V C2 = 220uF/50V Q1 = D1885/D1710 A/B= To A fluorescent lamp/ and B to B fluorescent Lamp and just use one pin B = Battery 12 volt with currents above 5A Roll of copper wire on ferrite rod, with : L1 = 1.2 mm diameter wire with many loops winding 20 times L2 = 1.2mm diameter wi

This is an efficient flyback driver for modern cylindrical rectified television flybacks. Many sites doesn't provide circuits driving these transformers, they simply say that they are bad. I don't agree. In fact I built this circuit. I spent a lot of time for finding resonant frequency (around 15Khz) and duty cycle. These transformers best work at around 90% duty cycle. You may notice corona breakdown at terminals and pfffff sound (as well as the ozone smell) when adjusting the off time trimmer to near 500-300 ohms. Of course it will work for other tipes of flyback as frequency and duty cycle have a large range.  Flyback Transformer Driver Circuit Diagram Frequency range can be increased using multiposition switch for other values of C3 capacitor ,for example 2 nF for 80KHz-200000KHz, but didn't found flybacks with so high resonant frequencies, in addition with higher values of c3 , eg 200nF, 2uF the frequency will drop making possible the use of ignition coils, and rectifi

1960 Model Transformer-less [Barterer Type] Radio - RCA Victor - Schematic Circuit Diagram