One microcontroller serves multiple external interrupts
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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 circuit provides for accurate half-wave rectification of the incoming signal. For positive...
The HA-4900 series comparators can be used as versatile logic interface devices, as shown in...
It uses a 6GW8 triode-pentode in an oscillator-amplifier design that combines a curious...
The device exhibits 24V at no load on pins +4, 5 and -7, 8. According to Wikipedia, this is...
This experiment has two main objectives. First, we will become familiar with the characteristics...
Without the specified delay the circuit could malfunction or even get damaged. A capacitor, which...
Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or connect...
2N3819 is an n-channel JFET especially manufactured for RF and mixer applications and provides...
I worked on developing a digital frostpoint hygrometer for measuring water vapor at NOAA. Using...
In this page we will introduce a great project designed by Toon Beerten. His project named "DIY...
I n this circuit, the alarm will be switched on under the following four different conditions: 1....
IC1 generates 150 µSec. pulses at about 80Hz frequency. Q1 acts as a buffer and Q2 inverts the...
This alarm is designed to sound its Siren only once. That is - when the alarm is activated - the...
20V child fS/iff power over a foreign vine wine Kiiit, bulb and plug Mount the bridge rectifier...
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