FIG. 57 is a simple delay lamp circuit, which is connected with the lamp E uses two-wire connection, so security bars when installed, can be directly replaced by an ordinary wa
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ll switch, without having to change the original interior wiring. When you press the key switch contact when SB, 220V AC by VD half crossing rectified, then by foot z R, thyristor VT applied directly to the gate, so that VT triggered the opening of the lamp E lights glow. Meanwhile, the charge stored in the capacitor C by SB product to bleed, after the release SB, power supply by VD, R. To C charge, the charging current can be maintained VT continue to open, so the lights will not go out E. When C Kang full charge, VT off, lights E self-extinguishing. C should be resistant to high-voltage withstand voltage of 300V solutions capacitor, and the leakage current is small. If the leakage current is relatively large, it may cause VT will not turn off. At this time, in VT gate between the cathode and a parallel resistor ikfl to solve, or choose trigger thyristor stream slightly larger, but the delay time will be shortened. Bong circuit when the lamp E lights flowing through the lamp current to alternating current BI Bo, the low light, but a longer lamp life.
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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