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How to use Battery charger
 

The battery charger created this time is equipped with voltage control and current control.
Usage is shown below.
 

First, full charged battery is prepared.
This is for setting up a voltage control circuit. If there is no full charged battery, it will charge about one day with about 300mA current or more.
Depending on the condition of a battery, it still may not become full charge.


Setup of the charging current

(1) Make the knob for current control into the minimum (full of left).

(2) Make the knob for voltage control into the minimum (full of left).

(3)Short-circuit the output of a charger.

(4)Turn the knob for current control to the right until the charging current is set to about 300mA.
I think that a problem does not have even a 500mA setup.
I am making it little current, in order to charge a battery for a long time.

(5)Connect a charger to a battery

Setup of the over charge prevention voltage

(1)Turn the knob for voltage control to the right until the charging current is set to about 100mA.
Because the latest car consumes current also in the condition where it is not used, it leaves the part.

 

Charge circuit at the side of a car
When connecting a charger with the battery of a car, it is troublesome to open the engine room cover each time.
Then, I prepared the easy charger connection circuit for the car side.

 

I attached this connector in the frame of a windshield. I don't know what this portion is called in English.

I am not the specialist of a battery. Therefore, I don't know what the charging current is suitable, and this over charge prevention circuit is effective, or not.
From now on, I will add a postscript, if it may be consulted by the used result.