Digital Tachometer Circuitry
Posted on Aug 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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Almost any receiver covering 540 kHz to 1600 kHz is suitable for broadcast band DX`ing, and there...
This simple circuit can detect the invisible fields of voltage which surround all electrified...
The time circuit can provide a time delay of up to 20 minutes. The circuit is a standard...
The circuit, built around an LM741 op amp configured as an inverting amplifier, is used to drive...
Large input-to-output voltage differentials, caused by wide input voltage variations, reduce a...
In synchronizing the audio and the projected film, a tone code must be used. This tone code...
The part of the hardware mainly finishes the magnification of sound, when the sound is enough...
While discussing an all-linear automatic night light circuit I mentioned that I was testing an...
The first problem is with the 16Mhz xtal the thing doesn`t even start to oscillate. But that`s a...
This circuit was originally designed to detect weak flashed of laser light bounced off of a...
Edwin Henry Colpitts was a communications pioneer best known for his invention of the Colpitts...
An interesting circuit of a bicycle horn based on a popular, low cost telecom ringer chip is...
This electronic liquid detector circuit diagram is based on the ULN2429 monolithic bipolar...
Maxim now has available a series of five integrated oscillator building blocks in the MAX260x...
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