Computer Serial Port interface
Posted on Dec 25, 2012
New Circuits
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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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Signals of identical frequency are applied to sync input (Pin 6) and to the demodulator input...
The circuit can be tuned to respond to signals between 50 MHz and 500 GHz. The economy model is...
This strobe light operates from standard 120-Vac power. Rl limits the amount of current applied...
A Motorola TCA5500 or TCA5550 can provide a stereo preamplifier system with tone controls. This...
This afternoon I have returned to 10m WSPR. There are lots of transatlantic reports of my signal,...
Voltage depletion is also called "sag" by some folks. The same general concept I`m covering in...
In order to measure the RMS value of an alternating voltage an accurate converter is required to...
Here is a simple PWM dc to ac voltage inverter circuit based on IC SG 3524. The SG3524 IC chips...
The LM3361A contains a complete narrow band FM de- modulation system operable to less than 2V...
Audio metering is present in almost any equipment that plays or records audio from cell phones...
The goal of this project is to design and build a full duplex digital fiber optic voice link over...
TDA2003 has improved performance with the same pin configuration as the TDA 2002. The features of...
This LASER is constructed on a polystirene sheet. An alluminium layer foil is placed and acts as...
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