Hey guys,
I was wondering if there is a circuit that is capable of detecting different colours ( as a voltage or current or something) without using a camera or webcam?
Are there cheap optical "band pass" filters for example that would pass only a specific frequency of light that I could possibly couple to 3 LDRs (RED , BLUE, GREEN) and somehow sum up the voltages or soemething and obtain a specific voltage for a specific colour ?
Thanks guys
I was wondering if there is a circuit that is capable of detecting different colours ( as a voltage or current or something) without using a camera or webcam?
Are there cheap optical "band pass" filters for example that would pass only a specific frequency of light that I could possibly couple to 3 LDRs (RED , BLUE, GREEN) and somehow sum up the voltages or soemething and obtain a specific voltage for a specific colour ?
Thanks guys