As shown for the simple adjustment of the high input impedance double wave linear detector circuit. The operational amplifier circuit by the negative feedback loop to compensat
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e for non-linear diode installed mobile feedback level Vf. Circuit without the use of precision resistors, which is characterized by the gain difference can easily be compensated for by the positive and negative input adjustment VR1 approach. Since the signal from the inverting terminal A1 input, the input impedance is high, it does not appear nonlinear distortion. Enter positive half cycle of the AC signal, the output of A1 is positive, D1 is forward biased and is turned on, it is also a positive input A2, A2 output is also positive, with R2, VR1, R1 to be A1 beta negative 1 feedback, in general, into a gain of inverting amplifier 1. In this case, when the gain adjustment VRl unchanged. When the input signal is negative half-cycle, A1 output is also negative, D1 is reverse biased, A2 input to 0, the inverting amplifier A2 becomes. In this case A1 through D2 negative feedback, in fact, it becomes a voltage follower, inverting input and A2 input AC voltage is the same, while working as a gain for the inverting amplifier A2 1. In this case, the gain can be varied to adjust the VR1 A2, adjusting VR1 so that the overall gain is unity.
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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