A bedside lamp delay circuit
Posted on Nov 10, 2015
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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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Using an ISD1016 audio record/playback chip (Information Storage Devices, Inc.), this circuit...
This is a DC motor controller circuit, built using transistor TIP31 based on H-Bridge concept....
Controlling heaters rated as high as 1500 watt requires stringent specifications with the...
It functions like almost any 555 astable timer, except that the LED is inserted into the...
This project came about due to my interest in a new form of radio transmission called DRM, which...
A very useful application of the 565 PLL is as a FSK demodulator. In the 565 PLL the frequency...
This circuit SP6691 has been designed to provide a high output voltage with a lower voltage boost...
The ML7005 is a multi-functional DTMF transceiver LSI with built-in a DTMF signal generator, a...
Voltage driving type pulse width modulator 1. feature and function of TL494 TL494 is produced by...
The zener provides a constant voltage of 20 V to unijunction transistor Q1, except at the end of...
Light onphototransistorQ1 (Radio Shack 276-130) produces voltage change across R2 for...
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