Im a novice, so please bear with my ignorance. I want to build a device that will sense when a rechargeable battery is fully charged and then stop charging it. The charger that I have is the common type small 110 volt transformer which plugs directly to the device to be charged. I have several items in need of such a device , and the batteries range in output voltages from 1.5 to 19 VDC.
Many years ago I built (but not designed) some electronic stuff using tubes, but, although I understand resistors and capacitors, I am not knowledgeable with regard to solid state circuitry.
Many years ago I built (but not designed) some electronic stuff using tubes, but, although I understand resistors and capacitors, I am not knowledgeable with regard to solid state circuitry.