8051 projects
Posted on Feb 5, 2014
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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 operating principle of the circuit is very simple. The first Led D1 is placed in series with...
A typical circuit at 20 MHz is shown. The crystal, which has an internal series resistance Rs of...
Another feature of this circuit is that you can use the keys "1, 2, 3, 4" of a Philips TV IR...
The electronic lantern control circuit adds high-efficiency dimming and flashing to an existing...
Crowbar circuits are so-called because their operation is the equivalent of dropping a crowbar...
A design for a synthesised ATV transmitter covering the 13cm band and beyond up to about 2. 6...
A fully parametric tube EQ and my best bet seems to be `merging` these two schematics into one so...
This fire sensor circuit exploits the temperature sensing property of an ordinary signal diode IN...
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This is a general purpose remote control project with using programmable PIC microcontrollers...
This is a special low voltage version of my audio preamp. T1`s emitter voltage is biased close to...
(Only shown the R channel, the original reference PCB label) o Figure (a) for the front tone...
Dragon -ZL-2801A DVD machine type switching power supply circuit It shows Dragon ZL-2801A type...
Feedback has shown TDA6120Q factor 1/83 test circuit shown in Figure. Input signal Vi composed by...
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