I had been commissioned to build 20pcs battery powered RGB table lights on a tight budget to be used in conferences. after some thinking i figured that by using some 5mm red green and blue led strip lights sla batts. and some pots i could do it rather cheaply and easily.
so after a lot of wiring and soldering i came up with this:
the pots do not do the best job in mixing since for the first 75% of the turn nothing much happens and brightness goes up very fast for the remaining 25% of the turn but i managed to find some 1K linear pots that have a relatively smoothish curve and do the job nicely for this application.
i split the strips into four to get a better distribution of the light and eliminate any shadow. i positioned them close to the centre to remove any hotspots and get better colour mixing.
The batt is a 12V 4.5Ah SLA and with all colours running at full power the array pulls 480mA so it should last for at least 8 hours on one charge.
here are the results:
The pics are take on my mobile phone camera so colours are a bit different in reality. the setup is capable of many more colours and shades but the camera does not pick them up.
since i had so many led's i tot id have a bit of fun before i delivered them so i hooked up ten arrays in my room to see the effect:
The arrays are about 3 meters away from that wall. again the camera does not pick up any of the other colours especially with this kind of brightness.
Thanks for looking
so after a lot of wiring and soldering i came up with this:
the pots do not do the best job in mixing since for the first 75% of the turn nothing much happens and brightness goes up very fast for the remaining 25% of the turn but i managed to find some 1K linear pots that have a relatively smoothish curve and do the job nicely for this application.
i split the strips into four to get a better distribution of the light and eliminate any shadow. i positioned them close to the centre to remove any hotspots and get better colour mixing.
The batt is a 12V 4.5Ah SLA and with all colours running at full power the array pulls 480mA so it should last for at least 8 hours on one charge.
here are the results:
The pics are take on my mobile phone camera so colours are a bit different in reality. the setup is capable of many more colours and shades but the camera does not pick them up.
since i had so many led's i tot id have a bit of fun before i delivered them so i hooked up ten arrays in my room to see the effect:
The arrays are about 3 meters away from that wall. again the camera does not pick up any of the other colours especially with this kind of brightness.
Thanks for looking