This article for Simple Positive Voltage to Negative Voltage Converter Circuits shows how to change positive DC voltage to negative DC voltage using special converter circuit. This circuit is useful for many electronic things. One famous and easy to use chip is IC 555 which is strong and works well. IC 555 are mostly used […]
Fire Alarm Circuit using Thermistor and IC 555
In fire time, the Fire Alarm Circuit using Thermistor and IC 555 help to find and warn people. This design uses IC 555 and thermistor to check temperature change and maybe fire. Thermistor is special part which feels the temperature change. Circuit is easy to make and thermistor changes resistance with heat. If hot then […]
Function Generator Circuit using IC L8038
Function Generator Circuit using IC L8038 is chip makes sine, square and sawtooth wave. It changes frequency using outside capacitor and resistor from 0.001Hz to 300KHz. Can change and sweep frequency with outside voltage. Gives strong and clean output and make all 3 waves of same time. Need few extra parts and work stable in […]
Simple Audio Level Indicator Circuit using IC LM3915
Simple Audio Level Indicator Circuit using IC LM3915 show sound strength with lights. Its display driver is good for sound visual circuits. It takes analog voltage and can light up 10 LEDs, LCDs or other displays in line. Here LED VU meter is used. Music lovers like it because it show sound level with lights. […]
Free Energy From Air Circuit
This Free Energy From Air Circuit uses free energy from air. Idea is simple as air is full of radio waves. When radio is ON we can hear static and even in empty place. So if we make strong power setup then air can give us endless energy. Circuit uses antenna, a good crystal diode […]
Power ON Delay Circuit
Power ON Delay Circuit using IC 555 give time gap between power ON and circuit starts. When trigger comes, IC 555 work in monostable mode and give one output pulse for set time. Resistor R1 and capacitor C2 make timing part for delay. Output stay low with circuit OFF when capacitor is charging. When power […]