Crystal Testers
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 interface circuit provides electrically isolated RS485 communication inteface to the PC...
The circuit will come handy when you have to follow the mains wires buried in the wall or even...
The circuit uses CA3290 BiMOS dual voltage comparators. Non-inverting inputs of A1 and A2 are...
The circuit draws so little current that the shelf-line of the battery is the limiting factor....
The primary advantage of this circuit, when compared to other comparators, is its ability to...
A simple digital mixer, based on two dual-Schmitt triggers (4583B) and three exclusive-OR gates,...
This circuit is a two-channel baseband video switcher. Buffer amps Ul/Ql, U4/Q4, and associated...
Front and rear fog lamp schematic of Daewoo Korando shown in the following figure. It shows the...
The CD4001 quad 2-input NOR gate is a very versatile IC that can be used in an almost infinite...
The design is based entirely on Silicon Chip`s PIC-Based Water-Tank Level Meter, but instead of...
The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840. The IRF...
The last thing to do is to wire the IR LEDs, the resistors, and the IR receivers into the...
This circuit describes a simple, 6-bit random number pseudo-generator used to study binary...
The circuit is composed of the parts below: (1) infrared emitterThe multi-harmonic oscillator is...
As shown in FIG alarm by a gas-sensitive sensor element QM, buck rectifier and regulator...
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