The total dollars count for all parts is much smaller that the cost of an heavy duty DPDT foot switch. As seen on the previous page suggested electronic switch circuits can be made easily and I have found that their applications is justified. New mechanical switches on the market like large game switches can be used as a foot switch, they are rugged enought for this application, large and attractive and their cost is
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very low. Developping further the basic electronic switch I have designed a circuit which by using a single push button foot switch will allow switching sequentially up to three effect circuits plus a by-pass. The Circuit below was designed for my son and after using it said to me " Dad you should patent this as there are none on the market except for those found on expensive computerized multiplexed board ". He was enchanted with its performance, fast, noiseless, no signal loss and easy to use. As previously mentionned, a normally opened push button switch is used to activate a simple pulse preconditiong circuit made with Q1, 1K ohms resistor and a. 4uF capacitor. The output of this circuit trigger is connected to pin 14 of a CMOS 4017 Counter. As the counter is programmed to count from 1 to 4 by connecting pin 10 to pin 15, each time the switch is depressed, the output of the 4017, pins 2, 3, 4 and 7 are switched on sequentially to activate one of the four switches of a CMOS 4066 Analog switch IC. This action is very fast and noiseless. See more about the CMOS4017 applications on pages 34 and 35 then press "BACK" to return to this page. To identify which switch is activated, an LED is connected to the 4017 outputs with a current limiting resistor, R1-R4, connected in series, In addition to identify the switches it insure that the switches are off when a positive signal is not applied to the switches gate. These LEDs are...
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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