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 upto 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 timer […]
Dark/Light Activated Circuit using LDR 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 to 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 through […]
3 LED flasher circuit using transistor Here is another type of LED flasher circuit but this circuit is also about same as my previous led chaser , here is some changing in this circuit.This is Very Easy and beautiful LED chaser that is made using without any ic . only transistors, capacitors and resistors are used to make this LED […]
12v CFL Inverter circuit for Emergency Light This is a small power inverter circuit that produce 230v ac at the output through transformer.Circuit is designed by T.Kalpana. This can be used as the emergency CFL lighting , CFL need AC input for operate and this circuit provides the AC to CFL . This circuit is very useful for home ,shop, […]
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. Current drive to the LEDs is regulated […]
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 […]
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 […]
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 […]
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 […]
Dual power supply circuit Some circuit required dual power for better operation like power amplifier, audio amplifier or other power circuit . That circuits made for operating with dual supply input voltage. Dual supply means- One terminal gives +ve. One terminal gives -ve and one is for ground . Two terminals gives +ve and -ve supply accordingly and third is […]
Electret Condenser Microphone Amplifier Circuit This is Another a circuit diagram of homemade MIC Speaker Amplifier using LM386. This is small and powerful for at low power supply . This is the Best and interesting circuit for beginner. In this circuit a transistor is used as preamplifier which make input signal noiseless and give input at ic at high gain. […]
Colour Changing LED chaser circuit using Bicolour LED Here i am presenting a circuit of 10 dual colour LED flasher (Not using Flashing LED) which blinks one by one in sequence. This circuit is based on popular counter circuit using 4017 and 555. One colour of all LED remain fix and second colour of all LEDs in running mode one […]
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