A 24V DC power supply circuit using LM7824 IC. LM7824 is a 24V 1.5A fixed output voltage regulator IC, available in TO 220 package. It is an IC...
15V DC power supply circuit using LM7815 IC. LM7815 is a fixed volage regulator IC with three leads for input, output and ground. The IC requires...
12V 5A power supply circuit using LM338 IC. LM338 is a adjustable voltage regulator IC comes in 3 terminals. This IC also contains many built in features...
The 24V dual power supply circuit mentioned here can be used to power the above mentioned audio equipments and also work with other...
The Circuit of a 8V power supply using LM7808 IC. LM7808 is a voltage regulator IC available in TO-220 transistor package. This IC is packed with many built in features...
The schematic shown below is a circuit of 10V power supply using LM7810 IC. LM7810 is an IC of LM78xx voltage regulators series...
Here is the circuit of a 6V power supply using lm7806 IC. LM7806 is a voltage regulator IC of...
Circuit of an 11V power supply using LM7811 IC. The circuit is using only few external components; the output current of the circuit is upto 1A...
The project shown here is a schematic of LM317 5A variable Or adjustable power supply circuit. LM317T is a very famous voltage regulator IC mostly used...
Here is a 5V 5a power supply circuit using LM7805 IC. LM7805 is a 5V fixed voltage regulator IC with the max output current of 1.5A, but by using a transistor you can...
Here is a very useful project of a power failure alarm circuit, which will start producing a melodious alarm and light up a bright white LED in the absence of mains power...
Here is a schematic of a power failure light circuit. The circuit is using 10 super bright white LEDs which will become activated automatically in the absence mains power...
A 555 IC can be used to build a very efficient touch switch circuit like the one shown here. We can also say it a touch activated relay circuit. The circuit is quite sensitive...
The figure shows a schematic of push ON Push OFF switch circuit using a 555 IC and relay. The circuit can be operated with a 12-volt battery or power supply...
The figure below shows a very simple and useful project / schematic of a time delay relay circuit using a 555 timer IC.
Many projects in electronics require dual power supplies. The figure below shows a project / schematic of a 5V dual power supply using 7805 and 7905 voltage regulator...
This 6V dual power supply circuit can be used for any project or device, which require 6 volt dual supply. The circuit is built around two voltage regulator ICs...
This is a simple circuit of power supply uses one transistor and few components...
The figure below shows a circuit diagram of a simple 12V dual power supply using zener diodes. A dual power supply circuit can be very useful to operate many...
Here is a very simple and useful project / schematic of a 12V to 3V converter circuit. The output current of the circuit is around 1A.
A very simple zener diode 9V dual power supply can be made with using only few components. The whole circuit can be made in few minutes if all parts are available...
The figure below shows a very useful project / schematic of a regulated 3V 1A DC power supply circuit. The circuit can be used to operate wide variety of 3 volt...
A high current 9V power supply circuit can be made easily by using a transistor with LM7809 IC. The figure below shows a 9V 5A power supply circuit...
The figure below shows a project / schematic of a clap switch circuit. The circuit will switch on the relay and an led when a clap or other loud sound is detected...
A simple timer circuit can be built by using only a single or two transistors. The figures below show different schematics of simple timer circuits, which can...
The figure below shows a project / schematic of a 24V 5A power supply circuit using LM7824 voltage regulator IC and TIP2955 transistor...
Here is an easy project / schematic of a 12V 10A power supply circuit. The circuit can be very useful if you have a need of high current 12 volt supply...
Here is a very useful and reliable circuit of a long duration adjustable timer using 555 IC or we can also say it long duration time delay relay...
This is a project of a simple toggle switch circuit using a CD4017 IC. With this circuit any AC or DC electronic device can be operated with a single push button....
A simple long duration or long delay timer circuit can be built using a single 555 timer IC and few external components as shown in the figure...
The figure below shows a very useful project of a 555 adjustable repeat timer circuit. Previously we have presented some 555 timer circuits on this website which can...
A touch activated toggle switch can easily be made be using a CD4017 IC with few other components. The CD4017 is a decade counter IC that is wired...
A toggle switch circuit can also be made with a CD 4013 IC. CD4013 is a CMOS chip available in 14 pin dip package. It can be operated from 3V to 15V DC...
This is a project of automatic on off proximity switch using 4017 IC. This project can be used at the entrance door of any room, garage, washroom etc to automatically...
If you want to operate your home electrical appliances remotely then this IR or infrared remote control switch circuit can be ideal for you. The circuit is using a 5V relay...
This is a project of a power ON delay timer circuit using 555 timer IC. It is an ideal circuit if you want to power on your appliances after few seconds or minutes delay...
Here is a very useful project of a 1.2 to 57V stabilized adjustable power supply using LM317HVK. LM317HVK is a three pin positive adjustable voltage regulator IC...
Here is a circuit built with a famous 555 timer IC. In this circuit the 555 timer IC is wired as a negative voltage generator. The circuit can be used for...
This is a circuit of a dual power supply using 555 timer IC. 555 is a famous timer IC and can be easily found at your local electronic store. The IC can be used...
This is a circuit of a dual power supply using 555 timer IC. 555 is a famous timer IC and can be easily found at your local electronic store. The IC can be used...
This is a project of a simple push button ON OFF switch using transistors. Some times we require to switch ON our electronic projects or appliances...
The figure below shows a project of a very sensitive low current triggered relay circuit or low current relay driver circuit which can triggered a relay switch with only 5uA...
Here is a 3.3V stable and regulated power supply circuit using L78L33 IC. L78L33 is a three terminal positive voltage regulator IC of L78L00 series...
This is a project of a versatile multi stage adjustable long duration timer circuit. The circuit can be adjusted for different timing cycles...
This long duration timer circuit can be adjusted from few minutes to max two weeks or 14 days. A relay switch is used at the output of the circuit that can drive AC or DC...
Here is a project of a long duration timer that can be adjusted from few minutes to several months. A relay switch is connected at the output of the circuit...
LM317 single push voltage selection power supply circuit. The different voltages can be selected easily by simply pushing a push switch...
The figure below shows a very useful project of a repeating timer circuit using two 555 timer ICs. After pressing the push button S1...
The schematic shown below is a project of a 555 sequential timer circuit. This is a very useful project and can be used for variety of purposes...
A good long duration timer can also be made by using only three 555 timers ICs and few discrete components, the number of ICs can also be increased to increase the...
These simple optocoupler relay driver circuits can be used in variety of electronic projects. There are two types of circuit shown here...
This article describes a simple project of a solid state relay which can be used in the place of electromagnetic relays. The circuit can be easily drive AC load of 1000 watt...
Here is a very useful circuit of a 12V DC solid state relay. The circuit can be used in the place of 12V mechanical relays...
These simple Isolated AC detector relay switch circuits can be used in variety of projects in which ac detection is required. There are two different circuits shown in...
This simple voltage booster circuit can boost the voltage of a 1.5V battery to 40V to 70V DC. We can also say it DC to DC step up converter. The output current...
The circuit shown here can drive a 12V DC relay with 3V DC. The circuit will work with all low voltage projects for example with CMOS and Arduino projects and any...
The article describes a 6V to 12V converter or DC voltage booster circuit. It is also called step up converter. The circuit can be used in projects where step up...
Here is a project of a 100mA adjustable power supply using LM317L IC. The output voltage of the IC can be adjusted from 1.2V to 37V DC...
This article describes a DC to DC adjustable step up boost power supply / converter circuit. The output of the circuit can be adjusted from 1.2V to 37V DC, the output...
12V to 24V DC to DC Converter using a NE555 timer IC and few other discrete components...
The figure below showing a simple and accurate 12V regulated power supply circuit using LM2940CT-12 voltage IC. LM2940 is a positive voltage regulator...
The following circuit of adjustable step up boost converter can be used for variety of different voltage boost requirements. The circuit is using an LM2577-ADJ IC...
This is a project of a mini solar plant circuit. The project is very simple and easy to build and also cost effective. It will provide 12V and 800mA current with a 6V battery...
Here is a project of a 3.3V 5A power supply using lm1084. The circuit is very simple and provide regulated 3.3V output. It can be used with any project, which...
The article describes a project of 5V 5A power supply using LM1084-5.0 IC. The circuit can be used with any electronic projects or devices, which require 5V supply...
This simple regulated power supply can be adjusted from 1.2V to 15V DC. The max output current is 5A, due to which it is an ideal supply to use in your lab...
The figure below shows a very useful project of a 5V 1ampere regulated power supply using LM2940CT-5.0 IC. The circuit can be used for variety of your 5V projects...
Here is a project of a simple 5V to 3V converter. The circuit can convert a 5V supply to 3V with an output current of 800mA. It is a very useful circuit if you want to drive a 3V...
Here is a very useful project of backup power supply for your routers and modems that keep your Internet running during the power outages...
This simple mains delay switch circuit can be used with the electronic appliances to give some delay before power ON to make them safe from sudden power shocks...
The figure shows a simple adjustable regulated power supply using TL431 IC. TL431 is a three pin adjustable voltage regulator IC, able to deliver output voltage from...
The article describes an easy to build touch activated switch circuit using a CD4011 IC. CD4011 is a CMOS IC from 4000 CMOS IC series...
Here is a project of a touch activated sequence switches circuit. The circuit is having six relay switches, which can be activated one by one by touching a single touch...
This is a simple project of a regulated adjustable power supply using L200 IC. The circuit can provide adjustable output from 2.85V to 15V DC with 2A max...
The figure below shows a project of a simple latch switch using transistors. A latch switch is a circuit that works as a continuous open switch once it received an input...
This article explains a simple project of an auto pause timer during power outage or disconnection. The circuit will stay paused when the input power is disconnected...
Simple long duration timer circuit using mosfet transistor and few other discrete components...
Simple timer using three transistors, the circuit can be further enhanced by experimeting with the resistors and capacitor values...
Fluctuation time delay is a circuit that can be used to save electronic appliances from sudden voltage fluctuations occurs in the mains...
Figure shows a project of 5V 10A power supply. This power supply circuit can be used where high current 5V power supply is required...
Arduino is a 5V device therefore it cannot directly drive or control devices that uses more than 5V with arduino... level.
The figure below shows a project of LM317 soft start power supply. A soft start power supply is used to provide a soft start to an electronic device or application by slowly...
An arduino is a 5V device therefore it cannot drive projects which require more than 5V DC, and normally you have to use external power supplies. This power supply...
This wireless power transfer project transfers electrical energy / power wirelessly. It will light up a 3V bulb wirelessly, you can also use LEDs in the place of bulb...
Touchless / Hands Free Toggle Switch
This touchless or hands free toggle switch circuit activates and deactivates appliances by just a simple wave of hand, and hence user don't have to touch the switch...
1.2V To 13.8V Adjustable Regulated Power Supply Using LM1117-ADJ
LM1117 also comes in adjustable version that is used in the circuit here. The adjustable version also contains the same features as the fixed version...
The power supply shown here will fulfill the requirements of different voltages at the same time. The supply has four different outputs which are 12V, 9V, 5V & 3.3V...
Here is another high current 5A version of previously mentioned essential supply for arduino & other microcontroller projects...
This sound activated adjustable battery supply is intended to add sound activation in battery operated projects. The supply is adjustable and can be adjusted from...
Here is another great regulated power supply adjustable from 1.2V to 15V DC with maximum 3A output current built with LM1085...
Here is a project of a simple 5V 800mA power supply using LM1117 IC, LM1117 is a voltage regulator IC with built in features like over heat protection, able to drive 0.8A...
This is a project of a simple 5V 800mA power supply using LM1117 IC, LM1117 is a voltage regulator IC with built in features like over heat protection, able to drive 0.8A...
This article describes an adjustable power supply with short circuit switch off function, the circuit will automatically switch of its mains supply when any short circuit occurs...