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Posted on Feb 6, 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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This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature...
This project uses a four-point resistance measurement process also known as the Kelvin method....
In photography r a separate flash, triggered by the light of a master flash light, is often...
This de voltmeter, with high input resistance, uses a CA3130 BiMOS op amp and measures voltages...
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This little project was inspired by the Availabot from Schulze and Webb ( ). The Availabot is a...
The output frequency alternates between about 2100 Hz and 2200 Hz. This is a very distinctive...
It use the three transistor (2SC945, or 2C1815 or 2SC828) is main Which typical transistor...
A high quality microphone preamplifier using a single power supply, suitable for dynamic or...
As shown in Figure by the built-in temperature sensor to control the triac TC620 achieve...
4 ~ 20mA constituted by a TMP35 temperature transmitter circuit as shown in FIG. This circuit can...
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