Simple PC smartcard reader
Posted on Dec 27, 2012
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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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Although the TDA2030 can deliver 20 watts of output power, I deliberately reduced the output...
With this circuit, we can have a acoustic clue, frequency 2KHZ, when we have a short vibration in...
You most likely know that LM317 IC is applied as an practical provide regulator, but did you know...
Ground is used as a reference for the voltage divider, and that each successive point above...
The purpose of this project is to construct a computer that uses the combined computational power...
wireless audio and visual transmission to a TV. The TV acts as a receiver, eliminating the need...
A pair of thyristors in a controlled full-wave bridge configuration provide a 100Hz rectified...
The decimal value of the eight input lines is displayed on three seven-segment displays. Although...
Having two sets of PWM signal generating circuit within NCP5201 chip, a set of output pins and the
555 IC using a delay circuit ter It is the transition from low to high delay circuit. Ie after...
As shown mainly by the touch-delay switch one pair of D flip-flop CD4013 composed, it can be...
Figure 1-30 is an example of an OCL power amplifier circuit, the following specific analysis: In...
Figure 4-14 is a digital integrated circuit consisting of 16 preset potentiometers Siniperca...
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