How can I signal a USB charger to provide power?

Published: 17/08/2018
How can I signal a USB charger to provide power?
Source: ELECTRONICS.STACKEXCHANGE.COM

I want to use an 18650 battery pack to power a circuit with 5 volts at a low current. The 18650 battery pack has a USB output which provides 1 amp at 5 volts. I measure voltage drop across the left and right pins and it’s only .77 volts. When I plug in a device like a phone, it goes to 5 volts and a light turns on on the charger board. How can I get power without talking to the charger board? Ok a

Read more
Related news
Comment
FACEBOOK