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Lithium Heavy Duty Solar USB Charger 2.0
Bright Rechargable Headlight for Your Bike!
Portable USB Charger (Version 2.0)
Helping Hands from Notebook Cooler Pad
Portable USB Charger
Retro Rechargeable USB Booster
Adjustable Voltage Step-up (0.7-5.5V to 2.7-5.5V)
555 AM Transmitter
H-Bridge on a Breadboard
"Joule Thief" - no IC and no Transformer
Easy AM Transmitter!
Voltage Regulated [5v] Bicycle Dynamo Light & USB Charger
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