External LED schematics available?

Hi all,

I am designing a drone for using pixhawk and need to retrofit the external USB and LED for my own design.

So I draw schematics and circuit board for both USB and LEDs. 

USB works just fine however LED circuit does not work as expected. 

I tried to copy from the original LED indicator from 3DR and used following parts.

TCA62724 (i2c LED driver)

http://www.mouser.com/ProductDetail/Toshiba/TCA62724FMGOEL/?qs=%2fha2pyFadugFZ%252bnPwsG4hvgQBt4xK29j%2fFyZ4qlVGII%3d

LRTBGFTG-T7AW-1+V7A7-29+R (RGB LED)

http://www.mouser.com/ProductDetail/OSRAM-Opto-Semiconductors/LRTBGFTG-T7AW-1+V7A7-29+R/?qs=sGAEpiMZZMseGfSY3csMkZCQAwdWUKdfS5MJ%2f%252bYNLRE%3d

Schematics as follows.

3691242683?profile=original

The circuit is very straight forward and nothing special by any respect.

When plugged in the I2C connector in Pixhawk, LED is not working and only RED LED is lit. 

No change in color and no blinking. 

Oscilloscope shows I2C protocol is flowing into the chip. 

Should I put protection resister between 5V rail to the RGB LED?

Does anyone can help me solving this problem here? 

Any comments will be much appreciated.

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • Late reply but might help someone else. This sounds like a power supply issue based on the RED LED only lighting. Check the voltage going into the circuit, should be 4.7V or more.- ted

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @a1k0n: Did I get rid of hand-tuned parameters? Yes. Am I still hand-tuning more parameters? Also yes. I have a few knobs to address the…
15 hours ago
DIY Robocars via Twitter
RT @a1k0n: I'm not going to spoil it, but (after charging the battery) this works way better than it has any right to. The car is now faste…
15 hours ago
DIY Robocars via Twitter
RT @a1k0n: Decided to just see what happens if I run the sim-trained neural net on the car, with some safety rails around max throttle slew…
21 hours ago
DIY Robocars via Twitter
Saturday
DIY Robocars via Twitter
RT @SmallpixelCar: @a1k0n @diyrobocars I learned from this. This is my speed profile. Looks like I am too conservative on the right side of…
Saturday
DIY Robocars via Twitter
RT @a1k0n: @SmallpixelCar @diyrobocars Dot color is speed; brighter is faster. Yeah, it has less room to explore in the tighter part, and t…
Saturday
DIY Robocars via Twitter
RT @a1k0n: I'm gonna try to do proper offline reinforcement learning for @diyrobocars and throw away all my manual parameter tuning for the…
Friday
DIY Robocars via Twitter
RT @circuitlaunch: DIY Robocars & Brazilian BBQ - Sat 10/1. Our track combines hairpin curves with an intersection for max danger. Take tha…
Thursday
DIY Robocars via Twitter
RT @SmallpixelCar: Had an great test today on @RAMS_RC_Club track. However the car starts to drift at 40mph. Some experts recommended to ch…
Sep 11
DIY Robocars via Twitter
RT @gclue_akira: 世界最速 チームtamiyaのaiカー https://t.co/1Qq2zOeftG
Sep 10
DIY Robocars via Twitter
RT @DanielChiaJH: Always a good time working on my @diyrobocars car at @circuitlaunch. Still got some work to do if I’m to beat @a1k0n howe…
Sep 10
DIY Robocars via Twitter
RT @SmallpixelCar: My new speed profile for @RAMS_RC_Club track https://t.co/RtLb7TcgIJ
Sep 10
DIY Robocars via Twitter
RT @SmallpixelCar: Practiced at @RAMS_RC_Club today with my new @ARRMARC car https://t.co/AEu2hCx89T
Aug 28
DIY Robocars via Twitter
Aug 24
DIY Robocars via Twitter
RT @gclue_akira: 柏の葉で走行させてるjetracerの中身 #instantNeRF #jetracer https://t.co/giVvuE4hP7
Jul 4
DIY Robocars via Twitter
Cool web-based self-driving simulator. Click save when the AI does the right thing https://github.com/pncsoares/self-driving-car
Jul 4
More…