Hello.
I'm using your DotStar 60 LED/m white.
I have 2 versions of DotStar as an attached picture. Above one is purchased about an year ago and the below one is purchased recently.
They are cut to 18cm and used. Every(about 50) old dotStar has worked well for a year, but every(about 40) new dotStar has a same problem. Only 10 leds are working in 18 leds. The color is changed as I want, but it's only 10 leds.
Test system:
- I designed this circuit and every parts are assembled by smt on the pcb. it has worked well with old version DotStar for a year.
- DotStar is connected to the pcb by wire and molex connector
- MCU is atmgea1280 and using APA102 library on your github, developed in 2014, probably the latest version of it.
Test 1:
New version DotStar cut to 18 leds(30cm) is connected in the same way as old version
Result: Only 10 leds are bright and color is changed what I set
Test2:
New version DotStar cut to 12 leds(20cm) is connected in the same way
Result: Only 10 leds are worked same as previous test.
Test3:
New DotStar cut to 18 leds(30cm) is connected in the same way. I changed a number of led to 50 on my firmware .
Result: Every 18 leds are bright and color is changed what I set
Question
1. What is the difference between the two versions in the attached picture.
2. How can I control the new version of DotStar in normal way not the trick.
Thank you in advance.
DotStar differences in manufactured factories
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- Chocodiget
- Posts: 1
- Joined: Tue Jun 19, 2018 2:42 pm
DotStar differences in manufactured factories
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Please be positive and constructive with your questions and comments.