As shown, the controller includes a buck rectifier circuit 555 multivibrator, lantern control circuit for ~ 220V, 5W low power parallel control lights or 6 ~ 12V small bulb ser
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ies rock control. 555 and D3, D4, RP1, C2 composition astable multivibrator, adjust RP1, changing the charging circuit, the discharge time constant, so that alternating square wave of duty ratio 2: 1 When the 3-pin output is low level, the discharge tube discharge within the substrate, 7 feet was low, LED1 bright, J1 pull, the first set of lights lit; 3 feet when the output is high, VT1 conduction, LED2 bright, J2 pull The second group of bright lights, and because J1 released the first set of lights out. At the same time, C3 charge, when C3 charge to 1.3V, VT2 conduction, J3 pull, the third group lantern light. Since VT2 saturated conduction, D9 clamp, make VT1 off, J2 release, the second set of lights off. Thus, by adjusting the RP1, RP2, so that the three groups equal time lights turn lights, such as lanterns and roll again and again. Transformer T uses 5VA, secondary 2X12V can 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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