Hi. I'm working on a little project that I decided to do after I bought 2 USB-chargers who got there power from AA/AAA batteries but I have ran into some problems and hoped that you could help me a bit.
The components are:
Battery pack for 4*R06 (generates 6 Volts)
1 +5VDC regulator (LM2940T)
1 100uF capacitor
1 USB type A contact
They are all connected like this:
Checking with a voltmeter I get 4.95 V out but when I connect a USB product like cellphone or Ipod, it only reacts to that something is being connected but no charger icon comes up. So I guess that I have to do something with the to remain pins on the USB-port (D+ and D-). I read that using a 100k resistor and connecting it in a special way could trigger the units to charge but I have no idea of how
So hopefully someone of you can help me what I should add to my circuit and how to make this work sucessfully.
The components are:
Battery pack for 4*R06 (generates 6 Volts)
1 +5VDC regulator (LM2940T)
1 100uF capacitor
1 USB type A contact
They are all connected like this:
Checking with a voltmeter I get 4.95 V out but when I connect a USB product like cellphone or Ipod, it only reacts to that something is being connected but no charger icon comes up. So I guess that I have to do something with the to remain pins on the USB-port (D+ and D-). I read that using a 100k resistor and connecting it in a special way could trigger the units to charge but I have no idea of how
So hopefully someone of you can help me what I should add to my circuit and how to make this work sucessfully.