Small Lie Detector
Posted on Jan 28, 2013
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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A Class A // Class AB amplifier rated 100 Watts when driving a 4 ohm loudspeaker. This circuit...
The circuit on the right uses three bipolar transistors to accomplish the same result with the...
The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It...
By using a potentiometer, R2, as one of the resistors you can dial up the output voltage wanted....
This is a design for the tracking transmitter of audio tone in FM band frequency. The circuit can...
This is a design for sensor circuit. This circuit is using LED for sensor a light. But, for...
This is a simple LED torch circuit based on IC MAX660 from MAXIM semiconductors. The MAX 660 is a...
Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being...
This JDM programmer works with a RS232, 9-pin(9 wire) DB9 Serial connector on your computer, and...
That circuit is similar in concept to the BK Butler/Tubeworks Tube Driver. Since there is only a...
After each zero electromagnetic pickup has a sine wave input, as shown in the National...
As shown in Figure 4 hours AC timing circuit. In this circuit, BH4024 is 7 serial binary...
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