Craig

Oh, I almost forgot the INA128 could not produce rail-to-rail outputs and I will probably lose the low current measurements. After reading some application notes, I guess I should use some proper current shunt amplifiers. INA214 looks good to me... Thanks a lot!

Hi Guys, I am trying to build a circuit that the MCU can measurement the current consumption of the circuit. I have read a few things and decided to go with the "low side" measurement. Incidentally I have some BB INA's laying around from my previous project, so I use it as the amplifier of choice. I am confused that which "Ground" should I connect the amplifier ref. and Voltage ref GND to - the ground of the load (virtual ground) or the ground of the system (0V)? Most importantly, will the circuit work? I am more a digital guy than analog - help appreciated. Thank you!

Thanks for adding mounting hole to the board, greg! I am thinking adding a laser-cut, translucent plexiglass cover to the clock for diffusion, so instead of adding the hole between the LEDs, I added a 'tab' to the inside of the circle, hopefully I can saw it off when not needed. I did some basic editing with my friend's copy (using remote desktop). This is my first time using Altium, The gerber files look fine to me, hopefully I did not make some terrible mistakes. The outer-most arc has a radius of 85 mm. So the completed ring would be a circle of diameter 17 cm. ledRing_2_021_Cra

Hi! Great project! I have been fascinated in RGB LED projects like this, although the project with the most RGB LEDs I built was the Aurora 18 mini kit I bought from here May I suggest something to add to the boards - mounting hole! Add a hole to the inner circle of each board, and we have 5 mounting holes, 72 degrees apart. Great for mounting on laser-cut acrylic using M3 copper/nylon screws. I don't have altium though, it would be great if greg could help me to do it. I will send the gerbers for fabrication after Chinese New Year holidays, If I receive 10 perfect e-test pass boards, I c