This is a really good project for anyone wanting a good old fashioned tremelo pedal using the original optical coupling technology employed in such things as the Reslytone RT-18. I reckon it`s pretty unique with what`s around. There are any number of tremelo circuits on the net, but a lot them either don`t work at all or not that well. I tried nu
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merous circuits and then tried to effect a simplified version of the Reslytone RT-18. Although I got it working, I found that it relies on a number of combinations of resistors and capacitors switched in banks to give the very smooth waveform it generates from the astable vibrator circuit. I cannot decipher the part of the schematic that does this. It`s just too ambiguous. After spending quite some time, I have a winner! The new circuit just completed works perfectly, runs on standard 9V DC, and produces no undesirable pumping because it uses an LED coupled to an LDR (light dependent resistor) to act as the variable volume control, just like the Reslytone RT-18. The repeat rate goes from 1. 5 times a second to about 15 times a second, and has a fully variable intensity from zero to almost a full cut-off. The oscillator is an op-amp Wein Bridge oscillator driving the LED / LDR via a Darlington transistor configuration. The signal from the guitar only passes through a simple transistor / FET coupling circuit. The op-amp just supplies pulsing to the LED, and also supplies the indicator LED on the top of the unit showing both the frequency & intensity of the tremelo. It`s a great little project for the tech inclined player, and cheap to make. It employs a true bypass stomp switch of course. I have designed the vero board layout which can be viewed here. I realise that there are any number of affordable whiz bang tremelos on the...
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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