Saturday

How to Make a 25 Amp, 1500 watts Heater Controller Circuit

Controlling heaters rated as high as 1500 watt requires stringent specifications with the controlling unit for safe and effective implementation of the intended operations. With the advent of advanced snubber-less Triacs and Diacs making heater controllers at massive watt levels has become relatively easier today.

How to Make Simple SCR Application Circuits

SCR is the acronym of Silicon Controlled Rectifier, as the name suggests it's a kind of diode or a rectifying agent whose conduction or operation can be controlled through an external trigger. It means that this device will switch ON or OFF in response to an external small signal or voltage, quite similar to a transistor but yet hugely different with technical characteristics.

Friday

How to Make a Cheap LED Name Plate with Illuminated Back Light

LEDs are no doubt gaining popularity by leaps and bounds and probably most of the illuminated decorative articles today incorporate LED as the light source. These devices are relatively cheap, extremely bright and outstandingly efficient with their operations.

How to Make a Vibration Detector/Meter Circuit

Whether it's truck throttling over the highway, or an airplane roaring about the sky, or whether it's a knock on the door or a purring of the cat or simply your heartbeats, the vibration level detector circuit explained here will sense them all and convert into beautiful sequencing LED light bar graph indications. The number of LEDs lit in the bar graph at any particular instant indicates the magnitude of the vibration force at that particular instant.

Simple LED VU Meter Circuit

VU meter or a volume unit meter is a device used for indicating the music volume output from an amplifier or a loudspeaker system. It may be also considered as a device for displaying the PMPO of the amplifier at a particular volume setting.

Thursday

How to Make a 220V to 110V Converter Circuit

Primarily there are two AC mains voltage levels that are specified by countries across the globe. These are 110V and 220V. The USA works with a 110V AC mains domestic line while European countries and many Asian countries supply a 220V AC to their cities. Folks procuring imported gadgets from a foreign region having a different mains voltage specs find it difficult to operate the equipment with their AC outlets because of the huge difference in the required input levels.

Wednesday

How to Make a Telephone Amplifier Circuit

The simple telephone ring tone amplifier circuit explained in this article saves the inconvenience of picking the telephone handset while speaking over a call. This circuit also particularly becomes useful when there's a need of the conversation to become audible to a number of people or a group of people.

How to Use Opamp IC 741 as a Comparator

We've been using this opamp IC probably since we were kids, I am referring to this wonderful little IC 741, through which virtually any circuit designing becomes feasible. It almost alone is able to handle many complex functions and makes circuit configuration very easy, that's why its one of the favorite chips not only with the new electronic hobbyists but also with the experienced engineers.

Monday

How to Make a Homemade 2000 VA Power Inverter Circuit

Making a power inverter rated above 500 VA is always difficult, mainly because of the involved transformer dimension which becomes quite huge, unmanageable and difficult to configure correctly.
Power inverters in the range of KVA, requires huge current transferring capabilities for implementing the required operations as per the desired specs of the unit.

Saturday

Simplest 1 Watt LED Driver Circuit at 220V/110V Mains Voltage

White LEDs are the lighting solutions of the future, simply because these devices can be lit brightly at relatively negligible power consumption. As an example, 1 watt LEDs are getting very popular nowadays due to their mini size and intense point brightness outputs, and as usual these require just  a watt at 4 volts for generating dazzling illuminations.

Thursday

Sunday

Simple DC Cellphone Charger Circuit

It is estimated that there are probably more cell phones in India than the number of toilets present here. Astonishing, but true. A simple DC cell phone charger circuit is one of those mates of cell phone that cannot be ignored because a cell phone would be dead without a charger.

Friday

How to Make a Simple 12 V, 1 Amp Switch Mode Power Supply (SMPS) Circuit

With the advent of modern ICs and circuits, the age old iron transformer type of power supply are surely becoming obsolete. Today power supplies are much compact, smaller and efficient with their functioning. Here we discuss one outstanding switch mode power supply circuit which can be easily built at home for deriving clean, ripple free 12 V DC.

How Switch Mode Power Supply (SMPS) Work

SMPS is the acronym of the word Switch Mode Power Supply. The name clearly suggests that the concept has something or entirely to do with pulses or switching of the employed devices. Let's learn how SMPS adapters work for converting mains voltage to a lower DC voltage.

Thursday

DC Motor Protector Circuit - Over Voltage, Under Voltage, Over Heat Protection

DC motor failures are commonly experienced by many of the users, especially in places where the relevant motor is run for many hours a day. Replacing motor parts or the motor itself after a failure can be pretty costly affair, something which nobody appreciates. A request from one of my followers was made to me regarding solving the above issue, let's hear it from Mr.Gbenga Oyebanji, alias Big Joe.

Sunday

Make this Simplest Transformerless Power Supply Circuit Using IC LR645


A very interesting yet super simple transformerless power supply circuit has been discussed here. In one of my earlier posts I provided a similar circuit but it utilized a high voltage capacitor for dropping the mains voltage to lower usable levels. Here we study how the mains voltage is controlled to 12 volts and 5 volts using just a single IC LR645G and some other supportive ordinary active semiconductors.