KAM LED lightcurtain control box dropped and now no function. DC rails are right , not yet checked crystal and 555 sub cct function This has 4 channel output , 20V drive to an array of coloured LEDs. Assuming the NXP micro is defunct, and the owner does not use the DMX or mic input or even speed variation , just simple unvarying sequence, would it be possible to salvage the curtain and use a christmass tree LED lightstring controller ?
I suppose using the variable 555 output to clock a 4 stage shift register and couple to the existing 4x TIP122 buffers would be sufficient for the owner's purposes rather than trying to find a suitable chrismass tree set
Pulling the micro and trying a 4013 clocked by the 555 and feedback between the 2 flip-flops gives quite a pleasant pseudo-random sequencing to the 4 strings. Just have to hope it does not have a latch up state - I've forgotten how to determine that, clocked through a few hundred cycles without hickup. For anyone else , in the future, where to put the ouput of the mic amp to give a beat sync to the lights?
I suppose for sound syncing, or'd with the 555 clock would be ok if the mic amp gives L to H transistion on the beat
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.