The mixer schematic is built on common base principle, where input voltages are transformed in alternative currents wich are summed to form the alternative current component for the collector. The total amplification is R6 / Ri, where Ri is one

IC 4060 is an excellent integrated circuit for timing applications. Its ten active high outputs can give time delay from few seconds to hours. With a few components, it is easy to construct a simple but reliable time delay circuitIC

Modern power control systems utilize electronic devices like Thyristors for power switching, phase control, chopper etc. These devices also find applications in inverter design, brilliance control in lamps, speed control of motors etc. Optimizing the TriacsD.MOHAN KUMARTriacs are the most

To get precise voltage to a circuit, the simplest and easy way is to use a Zener diode.It uses the reverse breakdown voltage characteristics to maintain a fixed voltage across itThe Art of Zener RegulationD.Mohan kumarZener diode ZD is used

This is a small tv transmitter circuit wich trasmittes in VHF, negative sound modulation and PAL video modulation.It is suitable in countries where the B and G system is used.Simple tv transmitter circuit diagram Post from: Electronic circuits and projectsSimple

It is an ideal solution to protect rechargeable batteries from deep discharge. It gives an LED indication when the voltage level in the battery drops below5.1 voltCA 3140 Op Amp is used as a comparator with a zener to fix

Electronic DOG Chaser Repeller The electronic dog repeller circuit produces a discomforting but not harmful, high frequency sound, audible to dogs but not to humans. Help stop the approach of unwanted dogs at up to 15 feet.It uses 555 circuit

The TDA1514A integrated circuit is a hi-fi power amplifier for use as a building block in radio, tv and other audio applications. The TDA 1514 circuit is totally protected, also has a mute function that can be arranged for a

Here is an ideal Mobile charger using 1.5 volt pen cells to charge mobile phone while traveling. It can replenish cell phone battery three or four times in places where AC power is not availableMost of the Mobile phone batteries

This circuit prevents overheating of soldering iron bit and subsequent damage. It keeps the soldering iron suffiently warm but not hot during the interval between soldering works. The circuit also saves electric energy and protects delicate components through heat controlled

Why an electronic cricket? Many people like the cricket sound specially if they live in a big town. This electronic cricket circuit works in pulses, so the battery life is prolonged, the current consumption is just 2mA.The electronic cricket schematic

Fixed value inductors are now available with colour coded body. Most common type is the LGA series colour coded lead type (Resistor like) one which is readily available. It has excellent ferrite core material and has high Q and self

Protect your projects from short circuit and damage during testing. This Nine volt power supply has a short circuit indicatorProtect your projects from short circuit and damage during testing. This Nine volt power supply has a short circuit indicator so

delivers up to 250mW and can be used like a final stage audio amplifier for radio sets. The schematic is very simple: one BC547 transistor controls a balanced power amplifier built with BC337 and BC327. The total amplification is around

If an LED pilot lamp is used in battery powered circuits, it will unnecessarily consume power. This circuit lights an LED at power on and after one minute it will turns off.D.Mohan Kumar The circuit uses a Zener diode and

Here is an ultra-sensitive fire sensor that exploits the direct piezoelectric property of an ordinary piezo element to detect fire. The lead zirconate titanate crystals in the piezo element have the property to deform and generate an electric potential when

to capture light energy for battery charging. It converts light energy into electrical energy. Simple and ideal energy saving designs D.Mohan KumarRelated electronic circuits:Power supplies, Amplifiers and Battery chargers We like to announce you that we've just launched 3...High Current

using raw DC for chargingD.Mohan KumarRelated electronic circuits:NiCad Battery Charger This NiCad baterry charger circuit schematic can charge 6 volts...Dual-mode battery charger There are two main types of battery charger - constant...Automatic NiCad battery charger This circuit is an alternative

This circuit can detect the shadow of a moving person and sounds an alarm for three minutes. It uses a Photodiode to detect variation in light intensity. It is an ideal device to monitor entryD.Mohan KumarIC1 (CA 3130) is designed