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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A circuit stabilizes the current-transfer ratio (CTR) of an optically coupled isolator used as a...
The circuit uses a synchronous-detection scheme to measure low-level resistances. Other...
The output goes high when a preset temperature is exceeded. A fixed half-supply reference...
Fires can occur for several reasons, for example, forgot to turn off equipment that could cause...
After having its engine and other mechanical parts restored to its optimum condition, the next...
The signal from a microphone is two weak for a standard line input. This low-noise DC-coupled...
The MAX2605, MAX2609 are compact, high performance intermediate frequency (IF) voltage-controlled...
These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple...
Common Light Emitting Diodes (LEDs) require a DC forward bias current of 10 to 20 mA for proper...
This circuit uses a 555 timer to generate a sawtooth voltage waveform across a capacitor, then...
A couple of USB DACs but no one have I2S output. Some people doesn`t need S/PDIF input and they...
The way that this receiver works is very similar to the way that we as humans beings work. We see...
This circuit shows the use of the XCSB servo library to control 4 RC servos. The demo runs on a...
When the magnet approaches, N flux inside the bifilar coil increases. An opposing flux is...
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