220V AC by the step-down transformer T, a diode VDI-VD4 bridge rectifier and filter capacitor CI, output of about 12V DC voltage for the entire circuit use. Light control circu
Click here to download the full size of the above Circuit.
it consists of VTI, RG, Rl and the like RP components constitute the daytime sensitive electrical resistor RG affected by light exposure exhibits low resistance, the transistor VT conduction, the collector output low, the relay control transistor VT2 in the off state, relays loss of power does not act, the normally open contacts open, which controls the lighting does not work. Late Rooms, photoresistor RG light exposure and showed a high resistance, VT1 base potential to reduce the cut-off, the collector output high power level, VT2 off on the original state into the conduction state, the relay K is energized its normally open contact closure, can be switched according to the power supply so that the lamp lighting lights up. RP s resistance to change can change the size of the transistor VT1 base potential, it can be used to adjust the sensitivity of the light control circuit.
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.....
characters left: