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Thanks for sharing your idea. I use it to charge my 12V lead-acid battery from a (beefy) 5V power supply.I didn't have an ATtiny lying around, but there was a PIC24F at hand.It seemed that the IRLZ44 mosfet did not switch nicely at 200+kHz, so I lowered the frequency to about 80~120kHz and used a big coil from an old PC power supply. I guess the coil is around 1mH.The switching speed problem with the mosfet could be due to that no driver circuit was used, the gate was driven directly from the PIC (at 3.3V only).A switching frequency of around 100kHz works fine now.So, now I can charge and top up my battery to keep it in top shape:-)
DIY Buck/Boost Converter (Flyback)
Welcome to Laser Cutting
Laser Cutting Class
Thank you :-)Some 30 years ago, I worked in agriculture and found it very rewarding. Nowadays I'm an "IT Consultant", advising on problems.I sometimes miss the (happy) feeling I had back then of seeing your crops grow.Things can be so much simpler; You can't tell your onions that they must be ready for harvesting tomorrow :-)Give a hug to the dog.
Grow Ten Tons of Organic Vegetables: Leeks, Onions, Potatoes, Broad beans, Cabbage, Cauliflower, Sweetcorn, Courgettes & marrows, Sugar beet, Beetroot, Carrots, Swede, Kale, Calebrese & Broccoli, Brussel sprouts, rhubarb & Strawberries
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