Fluorescent energy-saving electronic ballast circuit
Posted on Dec 11, 2010
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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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This simple circuit is sure to have the police beating a path to your door - however, it has the...
When the fan seized up in my source and I changed it to a type with much less noise, turned on my...
The tachometer, on the same shaft as the dc motor, is simply a generator. It gives a dc output...
This circuit uses one of the LM389 transistors.to gate the power amplifier on and off by applying...
The circuit useful for distortion measurements notches out the fundamental frequency of 1 kHz to...
Heat sensor circuit can be used to control any device using heat sensor. In this circuit a...
This is a figure for a block diagram of a modern automated systems incorporate closed-loop...
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its...
Just about any power transistor can be used in this megaphone. Its suitable for boats, playing...
The thyristor fired coilgun is a common variant, due mainly to their high voltage and pulsed...
Imagine you are relaxing and reading your favorite novel while listening to music on your...
This Circuit is a DPM or digital panel meter. It has a analog bar graph display and a 3-1/2 digit...
These two resistors have two functions. One, if I touch the circuit by accident, they limit the...
This last article on bipolar junction transistors (BJT) is a potpourri of circuits. Some are...
j1PCI663 shame dynamic is input, differential output type of IC, but this circuit has a...
As shown in Figure 555 is a simple logic circuit test leads. Test pen 555 as the core, it will...
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