The shortcoming of the inductive ballast is that volume and weight are larger, one`s own power consumption is great, there are noises. The electronic ballast has low-voltage starter, non-stroboscopic, has no noise, energy-efficient, immediate advantage in the lighting twinkling of an eye, so the electronic ballast has broader development space. Th
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is circuit is commutated smoothing circuit, power switch and driving circuit, ballast and filament load loop three part to make up. Make up the function of each component of the circuit as follows: The kenotron VD1 makes up the smoothing circuit of the bridge rectifier VD4, filter capacitor C1, C2 series connection, function to receive the intersection of idler and direct-current volts of 310V in C1, the intersection of C2 and both ends after commutating and filtering the intersection of 220V and alternating current, offer the working power for postern high-frequency inverter circuit. The resistance R1, R6 arises and shakes the resistance, original for VT2 turns on and offers biasing, thus stimulate VT1, VT2 and form self-excited oscillation. Resistance R1 and electric capacity C3 make up and step down the starting circuit in parallel at the same time, can reduce the losses that over voltage brings to a certain extent. In order to guarantee the electric capacity C3 reliable operation, its withstand voltage value should choose to be greater than the mains voltage of twice, C3 withstand voltage value is 630V. Diode D5 and D6, its function is to protect the triode VT1, VT2, connecting in parallel can weaken the memory effect of electric charge greatly between triode base electrode and emitter, thus improve the switch speed of the triode. The voltage transformer T plays a mutual inductance coupling of signal role. It to wind by...
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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