A very simple low cost water level indicator circuit can be designed using this schematic circuit . This water level indicator is based on a simple CMOS IC CD4066 and indicates the amount of water present in the overhead tank and also gives an alarm when the tank is full. As you can see in the circuit diagram the circuit uses the widely available CD4066, bilateral switch CMOS IC to indicate the water level through LEDs.Water Level Indicator Using CMOS...

Here is a simple circuit for boosting 12 V DC to 24 V DC .The circuit is designed straight forward and uses few components.With few modifications the circuit can be used to boost any voltages. The transistor Q1 and Q2 (D1616)  essentially drives the primary of the transformer.The diodes rectifies the output of transformer to obtain a 24V DC at the output load(here a fan).The capacitors filter away noise and harmonics away from the output. Voltage...

This is an electronic circuit project of  gsm jammer or mobile cell phone. This  jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. The GSM1900 mobile phone network is used by USA, Canada and most of the countries in South America.Mobile Cellphone Jammer Circuit Diagram: This cell phone jammier is not applicable for use in Europe, Middle East, nor Asia. The GSM jammier circuit could block mobile phone...

This is very interesting electronic project for gsm jammer. A wonderful diy gsm jammer or cellular mobile phone jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. Gsm Cell Phone Jammer Circuit Diagram: The GSM1900 cellular cell phone network is made use of by USA, Canada and most of the nations in South America. This cellular phone jammer isn`t applicable for use in Europe, Center East, nor Asia. The GSM jammer...

A temperature sensor and a hot transistor hold biological samples at a preset temperature.It is common to use transistors for driving resistive heating elements. However, you can use the heat that a power transistor dissipates to advantage in several situations, eliminating the need for a separate heating element because most transistors can safely operate at temperatures as high as 100°C. A typical example is in a biological laboratory, in which the...