How to Build 5 Hours Continuously Emergency Led Light 18W
watch this video and learn how, one correction to last diagram, the current out is 350mA to LED 57V, the 1A is the consumption from 16V battery. More
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Ebay / Aliexpress Spot Welder more than 550 Spots!!
This is a test to see how many Spot it can do on a single charge. Watch this video to learn more More
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Fixing Baseus Soap Dispenser – Again!
After couple of months it was broken again …. So I had to do something more professional to fix it, see how More
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SDR Radio Fixing
Got this non working – so I have decided to open it and try fixing this. Watch this video for more information More
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Ebay / Aliexpress Spot Welder more than 550 Spots!!
This is a test to see how many Spot it can do on a single charge. Watch this video to learn more More
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Smart BMS tear down
This is disassembly of Smart BMS Chinese version with Bluetooth. The Mosfets in use are KIA2803A N-ch Mosfet , RDS(on)=2.2mΩ（typ.）@ VGS=10V Drain-source voltage VDSS 30 V More
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Aliexpress Spot welder disassembly
This is a disassembly of spot welder from Aliexpress operated with battery, working very well! More
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Recommended BMS for Lithium and LiFEPO4 Batteries
This is a new BMS from China – smart one working well!, see how I made it to work with LIFEPO4 batteries although it was bought for LITHIUM 4.2V More
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