I usually power my beginner prototype circuits using mb102 power supply board, but it needs an external elimeter to draw power and then regulate it.
I was looking for a portable solution for my 5 volt and 3.3 volt circuit needs and came up with using a portable battery charger for mobile phones.
I tried powering up a simple transistor and LED circuit with it but it wouldn't power-up.
I feel that there is some load sensing circuit in the portable charger which doesn't detect these low power circuits.
I also tried connecting different resistors to the charger, the charger outputs 5 Volts for a few seconds and then again shuts down and doesn't stay ON continuously.
It would be really comfortable to use a portable charger since it could be charged using a phone charger and would be very handy.
What can I do to make the charger output power on low loads?