Electronics circuit diagram, Projects,Tutorials

August 24, 2018

Powerful Audio Amplifier Circuit

Circuit 1 4558 ic Audio Power Amplifier Circuit Diagram This is circuit diagram of powerful audio amplifier. This circuit is given by Emmanuel. In this circuit one ic 4558 and 4 Power transistors are used with some discrete components. Use 20v-to 60v for operating this circuit. This is a single channel audio amplifier circuit. Use capacitor of minimum 50v value. […]

August 22, 2018

Autocut Circuit For Stabilizer

Autocut Circuit For Stabilizer Here is a presenting a circuit of auto cut that is used mostly in manual voltage stabilizer. This is a protection circuit that protects electrical appliances from high voltage. This circuit connected with the output of the stabilizer. When the voltage increase above from the required set level then this circuit activates the relay and then […]

August 13, 2018

STK4231 II 100w + 100w Stereo Audio Amplifier Circuit

2 Χ 100 watt Stereo Audio Amplifier using STK4231 II If you want to make a HI FI 100w High Power Stereo Audio Amplifier Then You can use this ic. STK4231 is a hybrid Thick film IC manufactured by SANYO ELECTRIC CO. LTD JAPAN. The STK4221II IC from is a dual high power amplifier chip, preferably suited for compact high power […]

August 10, 2018

100w simple inverter circuit using 555

Simple 100w Homemade inverter circuit using 555 You can make 230v AC from 12v DC very easily at home using this simple inverter circuit. You can connect up to 100W Load with this transformer. The output of this circuit is very good and very less noise. This inverter circuit made by using one 555 timer ic and 2 Transistors. 555 […]

August 9, 2018

Dark Sensor Circuit

Dark/Light Activated Circuit using LDR The dark sensor circuit is very useful to Automatic Switch ON and OFF any appliance by Detection of Light and Dark. LDR is a photoresistor that is used for the detection of light. When Light intensity high on LDR, The Resistance through it Decrease and When Light intensity is Low on LDR, then the resistance […]

August 9, 2018

Easy 3 Channel LED Flasher/Chaser

3 LED flasher circuit using transistor Here is another type of LED flasher circuit but this circuit is also about the same as my previous led chaser, here is some change in this circuit. This is a Very Easy and beautiful LED chaser that is made using without any ic. only transistors, capacitors and resistors are used to make this […]

July 25, 2018

CFL Driver Inverter Circuit

12v CFL Inverter circuit for Emergency Light This is a small power inverter circuit that produces 230v ac at the output through the transformer. The circuit is designed by T.Kalpana. This can be used as the emergency CFL lighting, CFL needs AC input for operating and this circuit provides the AC to CFL. This circuit is very useful for home, […]

July 23, 2018

12v Battery Level Indicator With LM3914 ic

12v battery charge level indicator circuit led bar graph The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. This ic is used for Dot and Bar Display. A single pin changes the display from a moving dot to a bar graph. The current drive to the LEDs is […]

July 21, 2018

Homemade Powerbank using Li-ion 3.7v Battery

Power bank For Mobile/Smartphone What is Power bank When we go away from home then i face a very common problem , that is power backup of mobile phone. During travelling it is very common problem to get regular power backup. If you’re travelling or out you won’t have a chance to recharge your device, simply plug in your power bank […]

July 14, 2018

Over-Voltage Automatic Switch off Circuit

Over-voltage Protection circuit using TL431 Shunt Regulator IC This circuit protects from high voltage. Automatic Equipment disconnect when the power cross the level of a fixed voltage. This is safety device to overvoltage . As per datasheet - TL431A is the three-terminal programmable integrated circuit . This is a shunt regulator diode. Look like a transistor. This monolithic IC voltage references […]

July 13, 2018

Solid State Relay With Triac And Optocoupler

Solid State Relay/ Optocoupler Relay Solid State Relay is a type of switch to activate Load by using without any Mechanical parts. In this there is only semiconductor devices used , no any Mechanical coil relay is used to Switching the Connected Load. Triac is used at the place of coil relay to switch ON and OFF. So this circuit […]

July 12, 2018

Delay ON Timer circuit using transistor

Delay Timer For Switch ON Supply To Any Appliance For Protection Delay timer is a device which is used to take some duration before switch on the main input supply to any equipment . This is a protection circuit to protect any electrical or electronic equipment and appliance from sudden high or unstable voltage. Delay timer take on hold the […]

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