Tape recorder position indicator-controller
Posted on May 19, 2012
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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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This interface circuit provides electrically isolated RS422 communication interface to the PC...
Easy to build, this high voltage generator is capable of generating up to 50KV but the breakdown...
Circuit provides a minimum of 7 V until the 9-V battery voltage falls to less than 2 V. When the...
Here is simple LED-power audio amplifier ambit with MOSFET amplifier TL071C and 2 may be up to 45...
The output of the 4017 is 100% duty cycle. so that means if you have step one and step two on,...
This project involves constructing an energy efficient broad spectrum LED lamp system. The lamp...
Any NPN transistor can be used. The author used a 2N3904, but a 2N2222A should work just as well....
Circuit is very simple and straightforward. Two inputs are added just to give an idea of input...
Using this design, you can construct an electromagnetically impulsed pendulum clock with a...
A very simple and efficiency Lithium battery charger and monitoring system, can be designed using...
Here is the design of an audio oscillator that runs at approximately 1 KHz. I don`t remember...
The schematic of its mixer part shows such an oscillator. The oscillator LC circuit only has two...
A circuit diagram for an adjustable rpm switch. It ’s something you can use to activate solenoids...
As can be seen, a power supply is usually the transformer, rectifier filter, adjust the yuan...
For our strong construction with the two 807 we do not need words. We all know the performance of...
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