Surge Protected Cheap Transformerless Hi-Watt LED Driver Circuit

Sep 30, 2012

The increased number of complaints from the readers regarding burning LEDs associated with my earlier posted transformerless 1 watt LED driver circuit, compelled me to solve the issue once for all. The power supply section of the circuit discussed here remains exactly identical to the previous configuration, except the inclusion of the "switch ON delay feature" which has been exclusively designed by me and added in the circuit for rectifying the burning LED problem (hopefully).

Make a Remote Controlled Toy Car Circuit

Sep 28, 2012

The market may be full of these hi-end remote controlled toy cars, but for a hobbyists making one at home can be entirely a different experience. The article below explains how to configure a simple remote controlled toy car using a ready made 4-relay remote control module.

Adding a Soft Start to Water Pump Motors - Reducing Relay Burning Problems

Sep 27, 2012

When heavy motor systems or high current motors are involved, initial switch ON current surge often becomes an issue. This surge tends to inflict huge sparking across the pump relay contacts causing corrosion and reduction in its life due to stress, and wear and tear.

Rain Triggered Instant Start Windshield Wiper Timer Circuit for Automobiles

Sep 26, 2012

The following circuit was requested by one of the readers of this blog Mr. Keval. The actual request was for a rain triggered windshield wiper circuit, but the idea here has been further enhanced with a quick start feature for better efficiency.

Comparing MOSFETs with BJTransistors - Pros and Cons

Sep 25, 2012

When we talk of electronics, one name becomes extremely related or rather common with this subject and that is the transistors, more precisely the BJT. Electronics is in fact based on these outstanding and indispensable member, without which electronics might virtually cease to exist. However with advancements in technology, mosfets have emerged as the new cousins of the BJTs and have of late taken the center stage.

PIR LED Lamp Circuit

Sep 24, 2012

The following circuit was designed by me for one of the followers of this blog Mr.Deepak upon his request. 
The circuit is a LED driver which responds to ambient light as well as to the presence of a human, person or intruder, and varies its illumination accordingly, let's know more.

Mini 50 Watt MOSFET Inverter Circuit

Sep 23, 2012

I have already discussed one 50 watt inverter circuit in one of my earlier posts, the only difference between the previous and the present design is in the output stage. The previous circuit involved power transistors where as here we have utilized mosfets making the configuration much easier and straightforward.

Making the Correct H-Bridge Circuit Configuration for Inverter Applications

Sep 19, 2012

We all probably know regarding the H-bridge configuration which has some very important applications in electronic circuits. However this configuration is never easy to make and implement, especially when mosfets are are involved.

Making a 200 watt Compact PWM Inverter Circuit - Using Tiny Ferrite Transformer

This circuit was requested by a few of the dedicated followers of this blog, namely Mr. Rashid, Mr, Sandeep and also by a few more readers. Initially I could not figure out the concept behind these compact inverters which completely eliminated the bulky iron core transformers. However after some thinking it seems I have succeeded in discovering the very simple principle associated with the functioning of such inverters.

Make a Battery Charger Circuit in 15 Minutes

Sep 17, 2012

I have posted many battery charger circuits in this site, some are easy to build but less efficient, while some are too sophisticated involving complex construction steps. The one posted here is possibly the easiset with its concept and also is extremely easy to build. In fact if you had all the required material you would build it within 15 minutes of time.

Easiest Single Axis Solar Tracker Circuit System

Sep 13, 2012

In this post we learn how to make a very easy solar tracker circuit using a predetermined algorithm through a 555 IC timer circuit.

Solar Battery Charger, AC/DC Adapter Changeover Relay Circuit Diagram

Sep 11, 2012

The enclosed circuit of an solar battery controller, AC/DC adapter automatic changeover circuit was requested by Mr.Juan. Let's learn more about the request and the circuit from the below given discussions:

Simple Water Level Controller Circuit with Over Voltage and Under Voltage Cut OFF

Sep 10, 2012

I received the following contribution from Mr.Vineesh, who is one of the keen readers and followers of this blog. He is also an active hobbyist who likes to invent and make new electronic circuits. Let's learn more about his new circuit which was sent to me via email.

Making a Transformerless Solar Inverter Circuit

Sep 8, 2012

Sun is a major and an unlimited source of raw power which is available on our planet absolutely free. This power is fundamentally in the form of heat, however humans have discovered methods of exploiting the light  also from this huge source for manufacturing electrical power.

Mains AC Overload protection Circuit for Voltage Stabilizers

I have published a few mains voltage stabilizer circuits in this blog, these units are designed and intended for safeguarding the connected appliances at their outputs. However these equipment lack one protection which is the overload protection.

Make 400 watt MOSFET Sine Wave Inverter Circuit

Sep 6, 2012

The post explains probably the most easiest 400 watt sine wave inverter circuit, which requires lowest number of components and yet is able to produce optimum results. The circuit was requested by one of the active participants of this blog.

Automatic Inverter and Mains AC Changeover Circuit

Sep 4, 2012

I have been put forth with this question many times in this blog, how do we add a change over selector switch for automatic toggling of an inverter when AC mains is present and vice versa and also the system must enable automatic switching of the battery charger such that when AC mains is present the inverter battery gets charged and when AC mains fails, the battery gets connected with the inverter for supplying AC to the load. The configuration should be such that everything takes place automatically and the appliances are never switched OFF, just reverted from inverter AC to Mains AC and vice versa during mains power failures and restorations.

Simplest Power Inverter Circuit Using a Single 555 IC

Sep 3, 2012

The idea persented in this article can be considered as the simplest mosfet based inverter circuit which is not only simpe and cheap to build but is also significantly powerful. The power of the inverter may be increased to any reasonable limits y suitably modifying the number of mosfets at the output stage.

How to Generate Pure Oxygen and Hydrogen at Home

We all know the potentials of these two gases and how important they are on this planet. Oxygen is the life sustaining gas without which no living creature on this planet can live, hydrogen on other hand has its own merits and can be considered as the future fuel which would ultimately power our vehicles and cook our foods once all the naturally available fossil resources goes out of stock and gets depleted.

LED Emergency Light Circuit Using Boost Converter

Sep 2, 2012

The following circuit uses a very common voltage boost converter concept for making a group of white LEDs illuminate at relatively lower power supplies. Let's learn how to make this interesting and useful little LED boost emergency light circuit.

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