I am not an engineer, just an experimenter and hacker and prototyper etc, so, thanks to people who know a lot more than I do, I learned that this is not safe to use NOTE: This can only be used to dim a unit that runs off of a transformer-based power supply, ie something that doesn`t run off of 120 V, but 12, 24, or 48 Volts. Solder iron, wire stri
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ppers, breadboard or perf board, wires, 9V battery, IRF730 transistor, bridge rectifier, Arduino, infrared detector ( like this one ), SONY universal remote control ( like this one ) ButI had been trying for a number of weeks to perfect this, as in, find the correct transistor that would not overheat or burn out (one that is rated for a high enough voltage since it`s using AC 120 V). I followed this circuit from Dmitri`s blog, except instead of the IRF 250 I used an IRF730. At first, I was using the IRF 520, with a 100 V drain source voltage and a 9 amp continuous drain current. It worked fine at first, and then it burnt out (there was connectivity between the gate-source and gate-drain). So I got an IRF540, with a 100 V drain source voltage and a 33 continuous drain current. This similarly worked at first, then burnt out. Finally, I used the IRF730 which works pretty well so far! And doesn`t burn out it is rated upto 400 V (which far surpasses the 120 V wall voltage in the US). I like to use this type of cord (see the main image here), that is ungrounded (it has only two strands and two prongs), it has some places to plug in an AC device, namely your lamp or fan, or whatever you will be dimming. Once you cut it, strip away some of the rubber insulation around the wire, leaving about 1/8 ³ copper wire hanging out, enough to plug into a perf board or a screw terminal (which I highly recommend using, as AC current should be...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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