Inside an Aldi Ferrex 20/40V battery (with schematic)
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Inside the ALDI Ferrex 20/40V battery charger with schematic
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Simple NiMH battery charger (with PCB files)
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TPS613226ADBVT Integrated Circuit Chip 1.8A Switch Current Boost Converter SOT-23-5
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Two wire (no neutral) PIR detector - with schematic
22:25
Dramatically improve microscope resolution with an LED array and Fourier Ptychography
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Ultra small solar power bank with retro circuitry (with schematic)
15:52
eBay 9 MILLION mAh power bank teardown (with schematic)
20:40