over reference circuits for instrumentation
Posted on Feb 7, 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 hybrid circuit uses a mixture of transistors, an IC and a relay and is used to automatically...
The TL3103 linear Hall-effect device can be used as a compass. By definition, the north pole of...
The three schematics represent three building blocks for a 10-meter SSB transmitter. Or these...
Above diagram is a very easy and efficient receiver for actuating garage doors, starter motors,...
This simple circuit can monitor the charging process in 12 Volt Lead Acid battery or Tubular...
Electronics Nerd shows us how to reverse engineer an IR remote control signal. By understanding...
The IEEE standards for so-called "high power-over-Ethernet" (HPOE) have yet to be resolved, but...
The transmitter circuit described here has an extra RF power amplifier stage, after the...
This LED thermometer is designed for in home use, to read temperatures between about 60 and 78...
The LM35 temperature sensor provides an output of 10 mV/ƒ for every degree Celsius over 0ƒ. At...
A "video-digitiser" (also known as a "frame grabber") captures still pictures frames from a TV...
Constant current charging circuit long delay Shown as a long delay using CD4541 constitute...
Homemade disinfectant circuit of the present example describes the electrolytic salt solution...
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