Converter 220V AC to 40kV AC

Converter 220V AC to 40kV AC
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. (more…)

Car Battery Monitor with 3 LED

Car Battery Monitor with 3 LED
Car Battery Monitor circuit description: This is a circuit diagram of the 3 LED bar graph type battery monitor ideal for monitoring the voltage level of the car battery voltage with battery. (more…)

Flashing battery monitor

Flashing battery monitor
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. (more…)

Voltage reducer 24V to 12 V at 2.5 A

Voltage reducer 24V to 12 V at 2.5 A
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. (more…)

Simple LCD Power Supply

Simple LCD Power Supply
Laptop display commonly apply large screen Lcds, which generally will need a adjustable and a negative supply to ensure highest possible contrast. This circuit works with the system's positive notebook battery supply and generates a digitally adjustable negative voltage to drive the large screen Lcd notebooks.. (more…)

Isolated Voltage Sensors for Monitoring Power Supply

Isolated Voltage Sensors for Monitoring Power Supply
This is simple VCO ( voltage controlled oscillator) circuit , connected to your current instrumentation by an optoisolator, means that you can measure high voltages of your instrumentation more secure. The component values suit a 0  to 600 V input range (power dissipation in R1 and R2 set a limit on the input-voltage range). The circuit's linearity is not an issue, because you can linearize its output in software. (more…)