Easy , Simple and best FM transmitter circuit for homemade mini radio station Components Transistor- 2N3904-2 Resistor-1M-1, 470Ω-1, 47kΩ-2, 10kΩ-1 Capacitor-1nf-1, 0.1uf-3, 10pf-2, 33pf-2 Inductor- 4-5 Turn of 4 mm dia air core coil of copper wire Condenser mic-1 This simple and easy FM transmitter circuit can transmits the input signal get from the microphone upto 500 meter range […]
Over-voltage and Under-voltage protection Circuit for High and Low Voltage Cutoff. This voltage sensor circuit can be used to protects the any appliance to voltage fluctuation . When input voltage goes high then the relay will activated and also when the input voltage is below then required level then relay activated. Note– Load is connected with NC and COM pin […]
This is a Protection circuit from high voltage to any device by the automatic cutoff using popular ic 741. Note- Connect the load with NC pin of relay When the the input voltage at Non- inverting pin of op-amp 741 is cross over the set reference voltage . The output of this ic at pin 6 is goes to High and […]
This Autocut circuit is very easy, simple and very useful. Only One transistor and some other components are used in this Overvoltage protection Auto circuit. Load is connected with NC (normally connected ) Pin of relay. This circuit is very useful autocut circuit to protection of any electrical or electronics appliance from high voltage. If any device need 12v to […]
1.5 A Adjustable DC Variable Voltage Regulator Using LM317 ic The LM317T is an adjustable three-terminal positive-voltage regulator. This regulator IC capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. To set the output voltage it requires only two external resistors . Resistors R1 and R2 set the output to any desired […]
1.25 v to 32 v 10 A Voltage Adjustable regulator Circuit By this Regulator circuit Output Load Can connected upto 10 A Load . Output current is 10 A of this circuit. The LT1038 is a three terminal adjustable voltage regulator which is capable of providing of 10A output high current at 1.2V to 32V range. According to datasheet LT1038 […]
Electronic Ceiling Fan Regulator/AC Light Dimmer circuit We first discuss about the conventional big size resistive fan regulator.Conventional Old ceiling fan regulators uses resistive wire to connect in series and there are multiple points to connect the regulating knop switch to adjust the speed. This type of regulator works on fully resistor load between load and source to make a […]
What is impedance Impedance (Z) is similar to Resistance (R) . Impedance and Resistance both oppose the current in circuit. Both are almost the same thing , But resistance related to DC Circuit. Resistance oppose the steady electric current in DC circuit. Resistance remains same (constant) at any different frequency range. Impedance is related with AC circuit. Impedance vary […]
Simple LED Flasher with special sequencer running effect without microcontroller This LED flasher circuit is built with the using of one 555 timer ic and some other components. In this Flasher circuit only 7 LEDs are used but you can connect more than 7 LEDs with proper resistor and transistor. The 555Timer is connected as Astable configuration mode Which produce […]
Semiconductor P-N Junction Diode Working Principle Diode is the two terminal polarised electronic semiconductor device . One terminal is Anode(-) and other is Cathode(+). The cathode is marked with the silver colour or colour band. This is the simplest semiconductor device but this is very important and most useful in electronic circuits. Diode Function The main function of the […]
Electronic Siren Circuit Diagram We are going make a Police Siren Circuit using two 555 timer IC. The circuit will produce an up-down wailing sound from the speaker. In this circuit there are two 555 timer ic is used. Both 555 ic is connected as astable multivibrator/oscillator. In an Astable mode, it delivers a continuous sequence of pulses on its […]
LED Flasher/Blinking Circuit diagram Using 555 timer This is a Popular and Simple LED Flasher circuit using one 555 timer ic and some other components. This circuit works on the principle of Astable Mode operation of 555 timer. Which produce a continuous Pulse wave at output on pin 3. When pulse signal is High then one connection of LED […]
