DIY phone charger
What if there is a power failure and you have to charge your cell phone? With these instructions you can build your own charger that works with a bicycle dynamo. This way, you can produce electricity by using your muscles!…
What if there is a power failure and you have to charge your cell phone? With these instructions you can build your own charger that works with a bicycle dynamo. This way, you can produce electricity by using your muscles!…