Run LED strings on USB chargers and power banks.
38:21
USB to PIR to LED-string interface PCB.
30:00
Using salvaged lithium cells to power LEDs directly. (with protection test)
15:26
Dangerous USB chargers 16
26:58
Simplest solar light possible, using old phone battery.
57:00
Extra weird USB powered (less deadly) LED toadstool light build.
40:34
Convert tungsten fairy lights to LED. (plus ramble)
37:26
Power For Your Electronics Projects - Voltage Regulators and Converters
16:25