Hi all!!
I was thinking about creative ways to amplify or effect a signal..
It came to my mind the idea of using a LDR as a transistor, since it varies the resistance across it depending on light...
The concept is to use an opamp to drive a led, and the led acts like a gate.., the LDR has the drain and source and could be used as a transistor..
has anyone try this? i tried simulating it on livewire, it kind of worked..but i would like to know how it will sound..
I´m not really a friend of proto boards :icon_lol:
LDRs are slow, really slow, as in not fast enough for audio
Quote from: dschwartz on December 18, 2007, 07:26:39 AM
Hi all!!
I was thinking about creative ways to amplify or effect a signal..
It came to my mind the idea of using a LDR as a transistor, since it varies the resistance across it depending on light...
The concept is to use an opamp to drive a led, and the led acts like a gate.., the LDR has the drain and source and could be used as a transistor..
has anyone try this? i tried simulating it on livewire, it kind of worked..but i would like to know how it will sound..
I´m not really a friend of proto boards :icon_lol:
Look at the Flatline compressor. The gain string has a LDR as a variable element, i.e. darker=more gain.
Use it as a resistor, not a transistor.
i know, i know...
Ldr´s are slow...they´re used in compressors like flatline and dod 280...
but maybe an interesting sound can be achieved using it as i did..maybe percussion like? a low pitch noise? a delayed muffled sound?