Hello all,
i have some questions about a simple NiCd charging circuit.
adaptor: input 230 V ; 3 W
output 5.5 V ; 225 mA
there are a diode and a resistor in series with the batteries (2 NiCd SC1300).
I'm trying to calculate the energy flow but it doesn't work since there are some things i don't know.
Since there are two batteries the energy in the batteries when fully charged is 3.12 Wh. I read somewhere that there is 30% loss in the batteries while charging (heat dissipation), so the circuit has to deliver 4.46 Wh. My questions...
* what do they mean with the output of the adaptor?? thought there was only a primary and a secondary voltage... what does the 225 mA mean?
* i read somewhere the resistor is to stabilise the current.. how? why?
i have some questions about a simple NiCd charging circuit.
adaptor: input 230 V ; 3 W
output 5.5 V ; 225 mA
there are a diode and a resistor in series with the batteries (2 NiCd SC1300).
I'm trying to calculate the energy flow but it doesn't work since there are some things i don't know.
Since there are two batteries the energy in the batteries when fully charged is 3.12 Wh. I read somewhere that there is 30% loss in the batteries while charging (heat dissipation), so the circuit has to deliver 4.46 Wh. My questions...
* what do they mean with the output of the adaptor?? thought there was only a primary and a secondary voltage... what does the 225 mA mean?
* i read somewhere the resistor is to stabilise the current.. how? why?