This device allows up to 40,000 volts by 220V AC. The AC to AC Converter circuit is powered from the mains through primary transformer (220-24) to isolate the network while reducing the input voltage.
Here can be used as a fly-back transformer from a TV which is not used. Better to use a primitive type, without tripler or high voltage diode. This type of transformer is initially allowed to obtain ten thousand-volt voltage easily.
Here is a simple battery monitor circuit in which the LED will continue flashing until battery voltage is above the level. Transistors Q1 and Q2 are wired as an astable multivibrator circuit. This flashing battery monitor circuit can operate from a variety of voltages from 6V to12V.
This circuit is a voltage reducer 24V to 12V with output current of 2.5 A, it can adapt in a various uses, it is suitable to be installed on a truck because of all the electrical circuits of car audio, radio and some other modern devices for cars require 12 volt supply voltage.