printed circuit board pcb etching
Posted on Feb 4, 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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IC4, C1, R1 and R2 are used for the clock pulse which is fed to both the counters IC2 and IC3 Pin...
In this configuration, the display reads hertz directly. With pin 11 of the ICM7027 A connected...
A low-noise LT1115 (Linear Technology, Inc.) op amp is coupled to a class-A buffer amplifier to...
Using a 555 timer to drive a CMOS counter, this device uses RCA CA3079 zero-voltage switch to...
This highly sensitive movement detector is designed from bipolar transistors and draws a curren
The following diagram is the circuit diagram of 20W power amplifier which build based tube...
Electronic thermometer has countless applications. Not everywhere can we use the standard mercury...
If the TV receiver in question does not have a video input and its owner is reluctant to...
Here is the circuit diagram of a simple stepper motor controller using only elementary parts. The...
I got frustrated and decided to hook it up to a 15v supply and jump R3 with a clip-on soldering...
It`s entirely logical that low-cost miniature microcontrollers have fewer legs` than their bigger...
This article is the result of the very positive feedback on the hardware articles that I have...
The metal detector is composed of the probe oscillator, reference oscillator and audio amplifier...
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