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  1. U

    Photodiode / Phototransistor project

    Based on what you've said here has got me thinking. I have purchased a "TCS3200D" component. Basically I'm thinking of using this to measure a light source. There are 4 filters (Red, Green, Blue, Clear) above 16 stacked photodiodes. Each filter will give different responses when exposed to...
  2. U

    Photodiode / Phototransistor project

    Hello, Unfortunately I don't think I'll be able to do that - as you rightly say the processor would be frequently confused.  Is there anything yourself (or anyone reading) could suggest? Apart from using colour filters to "likely guess" what the light source is - I don't have much else to go...
  3. U

    Photodiode / Phototransistor project

    Yes I currently have the photodiode reverse-biased into an Op-Amp with a 1M feedback resistor (changed it to 500k to see different responses). As you say the current is amplified and voltage given at the output. During my various tests I did notice that regardless of what light source I used...
  4. U

    Photodiode / Phototransistor project

    Hello, I'm currently completing a project for my uni course and am struggling. I'm trying to use photodiodes to detect and IDENTIFY light sources - basically I need to design a system that can output what the light source is e.g. sunlight, artificial light, torch, candle light etc. I will use...
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