A two battery-powered light touch delay circuit, it can be placed on the bed pillow, nighttime convenience, to touch metal M under the capsule on a small lamp will automaticall
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y light F Zmin around. Indiscriminately, the NOR gate I, or non-f J and peripheral components single -shot timing circuits, or usually J output terminal pin is low level, the three shake tube VT3, VT4 off, small l E does not shine. Night Q. Just touch when needed temporary lighting F electrode sheet M, the human body sensors of clutter signal by VT1, VT2 amplification, the signal is a half weeks so that is input NOR gate L first O pin goes high, pin output low power level, the NOR gate foot jump goes high, the circuit into the temporary steady state, and VT3, VT4 conduction, small lamp E will be powered light. At this power by R, to C, charging the two input terminals NOR gate of, song lu foot stretch rising after about about 2min, paid back to the steady state of the NOR gate circuit feet of recovery low, small light F off. Or rli, NOR gate may be a quad 2 input NOR gate CD4001 digital integrated circuits, so that the manifold in use when the other two unused input NOR gate terminal, namely, a foot all connected with the negative terminal of the power supply G may not be vacant, in order to eliminate the potential interference ten.
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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