Hour time-delay sampling circuit
Posted on Feb 25, 2013
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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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In this circuit, a 74HC14 hex Schmitt trigger inverter is used as a square wave oscillator to...
The device generates an adjustable frequency of low to medium powered IR pulses of invisible...
A simple 120 V: 24 V, center-tapped control transformer and four additional components can do...
The simplest method of detecting metal is by beat frequency oscillator. The circuit basically...
A simple test circuit to fault find audio and radio equipment. Can be used to inject a square...
Entire AVR programmer has been build with using common parts and fits in the case of the serial...
The HV9911DB2 is an LED Driver capable of driving up to twenty 100mA LEDs in series from an input...
This timer was designed mainly to switch off a portable radio after some time: in this way, one...
Lots of consumer electronic equipment like TV sets, VCRs, CD and DVD players employs infrared...
Switched mode power supply units (SMPSUs) are popular but difficult to build oneself as well...
I've designed a high-voltage generator which uses a flyback transformer as the output stage....
450/800Hz oscillation circuit shown in FIG oscillator is a transformer coupling. The frequency...
As shown in FIG W7800 is positive Integrated voltage regulator and F007 consisting of an...
Diode VD2 ~ VD5, SCR vs consisting touch switch main circuit, R5 and VDI constitute a power...
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