There are situations in which very long cable runs are necessary from the pedalboard to the amplifier, or a more powerful driving circuit is needed to the heavy load presented by devices in parallel. A good buffer box is the solution. The best buffer board will present a high impedance to the input while having a low impedance output. This insures
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that the maximum clear signal will pass through unchanged to the output, and a low impedance drive can send the signal through long cables without losing much strength or response. There are numerous special purpose chips that are designed as buffers for driving very long lines and/or capacitance loads. These ICs can be difficult to find and expensive. A simple solution for stompbox purposes is to parallel opamps and thereby boost the output drive. With attention to a few details, this is a simple project to build. The circuit has four opamps placed in parallel. The outputs are isolated by resistors R1 through R4 which make sure the opamps share the output drive and no single one is carrying the bulk of the load. Resistor R5 is an pop prevention component and can be eliminated if desired. The value of R6 is essentially the input impedance if R5 is not used. When R5 is included, the input impedance is the parallel value of R5 and R6. Two capacitors are used on the output - since we do not know what load this circuit may be driving and we want to get full response, a 10uF output capacitor (C3) is a good value to chose. A 0. 1uF metal film (C2) is placed in parallel with C3 to insure that the response remains flat at high frequencies where the rising impedance of electrolytics could effect the sound. C2 could be left out without sacrificing much. An additional tweak is to make the R6 resistor a metal film component for lower...
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....
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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....
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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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