Precision time-countdown timer
Posted on May 15, 2012
New Circuits
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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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Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log...
Under good battery conditions the LED is off. As the battery voltage falls, the LED begins to...
On the initial part of the positive half cycle, the voltage is changing rapidly from zero causing...
This is an excellent Hi-Fi Stereo PLL FM Transmitter, the audio source can be the computer, sound...
The PSU you`re referring to doesn`t look extraordinarily large to me.Eagle should be able to...
This circuit yearn for act the performance of the equipment, otherwise Check the fuse here the...
The USB standard restricts the current consumption of all USB devices to either 100mA or 500mA...
A "talking" computer is not necessarily expensive - not if you mate one of the low-cost computers...
As shown having a multi-stage delay circuit is output. The operational amplifier circuit used as...
Closing switch S, the power supply positive half cycle, the power by VD1, Rl, VD2 to charge the...
Electronic switch selection, you can achieve multiple temperature control, or a plurality of...
Expressed in ASCII keyboard code CY512 easiest development system. It has three operating modes;...
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