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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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With a constant current excitation, the voltage dropped across an inductance increases with...
This circuit operates as an oscillator and a timer. The 2N6028 is normally on due to excess...
A low-current flyback converter is used here to generate ±15 volts at 20 mA from a +5 volt...
This unity-gain follower amplifier has a CMOS p-channel input, an npn second-gain stage, and a...
The Maya used several calendars simultaneously. One of them called the "long count", is a...
The circuit of the transmitter is shown in Figure 1, and as you can see it is quite simple. The...
This circuit could be used (depending on your circumstances) by a gentleman to summon his butler,...
By using a simple visual indicating system, this small transistor tester allows you to run a...
Colour Temperature is a term used to describe the colour tonality or shade of light. As anyone...
A common challenge for experimenters is increasing the gain of a low level DC voltage for...
The MFOS NOISE TOASTER circuit consists of seven main components: a voltage controlled...
Microcontroller BoardsPS-LPC2138 ADK, ARM Development Kit is proposed to smooth the progress of...
This is a "beta release" schematic. Use at your own risk The idea is to add this circuitry to a...
Fortunately, Dodd`s 1909 receiver has survived. It was found among the many parts that were in...
The SheevaPlug is reputed to have a marginal power supply. It seems to be more of an issue for...
Here remote Sun SPOT will send data to Sun SPOT on car which will drive the IC according to DC IO...
Environmental noise monitor circuit is shown. It mainly consists of high gain mu Specification...
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