Stopwatch 0-99 seconds (MC14518B)
Posted on May 20, 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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The above circuit is a precision voltage source, and contains a temperature sensor with a...
This is a circuit to use a standard, low quality opto isolator to transfer an analogue signal...
This circuit uses only one JC, either 1, LM393 dual comparator or 1/z, LM339 quad comparator. RV1...
Some months ago a surprise package turned up in my mailbox. Ananonymous donor had sent me...
The first section of the 555 timer is wires as an astable oscillator with R2 and C1 setting the...
This tutorial shows concepts for make a lamp withdual actuation. Through aparallelswitchor by...
This is anti theft alarm with wireless connectivity, called Anti Theft Car wireless alarm The FM...
Lately The Peasant has been building a music synthesizer using vacuum tubes. Although this will...
AM This circuit is tested and functionable. LM389 integrated circuit as the core element, the...
FIG aa, bb, and ce three-phase windings, respectively. Double throw switch Kl-l ~ Kl-4 hit the...
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