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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 circuit is for a QRP (low power) antenna tuner, a.k.a. a transmatch, for use in the short...
This device uses the second method (which, if you don't already know, requires about 100 times...
This 0- to 12-Vdc variable power supply uses an IC voltage regulator and a heavy-duty...
One of my student has made a disgraceful robot that used two stepper motors and with a simple IR...
This handy, pocket-size mobile transmission detector can sense the presence of an activated...
I bought a Doepfer LMK3+ keyboard from a very pleasant chap in Dunedin, via TradeMe, a popular...
This is the low cost AVR programmer using attiny2313. The schematic diagram is given below....
This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object...
For this test you will need an analog (non-digital) voltmeter. Do NOT remove the distributor...
This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms....
A touch screen is an electronic visual display that can detect the presence and location of a...
A very simple circuit forexperiments with AT90S2313, 2x16 LCD display and 4x4 keypad. The clock...
Tape output circuit by the left and right channel signals through the first buffer amplifier, the...
As shown in FIG circuit, T is auto voltage regulator. Its output fixed input end by a servo motor...
As shown in FIG. 1 circuit generates high voltage signal for controlling BST (barium strontium...
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