As shown, the 555 and the surrounding elements constitute a voltage - frequency conversion circuit. For determining the orientation of Earths magnetic field is a Hall-effect de
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vices integrated sensor UGN-3501M, The sensor contains a Hall element and a linear differential amplifier, the sensitivity of the device is about 1.4 mV/gauss, improve measurement Earths magnetic field sensitivity on both sides of the sensor against the two flat magnets to pick up the subject of Earths magnetic field lines more. Differential output of the sensor (1 feet, 8 feet), respectively uA741 consisting of the differential amplifier inverting terminal (pin 2) and a non-inverting terminal (pin 3) is connected to further enlarge and then added to 555. IC2 magnitude of the output voltage depends on the pickup device Hall magnetic field strength, and the voltage component 555 - the frequency converter output frequency of the pulse height depends on the charge voltage value C2, that is, the output frequency is low the orientation guide sounder which to decide. When adjusted by adjusting potentiometer RP1, so that when the magnetic field is zero, the pulse frequency of 555 to a certain value (eg 1000Hz), when the position changes due to changes in the magnetic field causes the frequency changes, the blind can be varied according to pitch determining the orientation of walking.
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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