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Mechanical jewelry box schematic
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Youkai:
I'm working on a mechanical jewelry box and I'm very new to electronics. This will be version 2 of my project. The first one was only semi successful so I'm giving it another go. I had a thread for the version 1 project that I'll link at the bottom if you are interested. For now though I have made some minor modifications to the schematic from that (adding BAT54S instead of wiring that part myself) and I'd like to run the schematic by you guys to make sure I haven't messed anything up horribly.

Here is some info on the parts I'll be using. I'll leave out the common things like capacitors and resistors that are standard their source shouldn't affect the circuit.

* Wall Adapter (x1): https://www.jameco.com/z/GS18U09-P1J-MEAN-WELL-2-Wire-AC-to-DC-Regulated-Switching-Wall-Adapter-18W-9VDC-2A-2-1mm-Plug_1952847.html
* Barrel Plug receiver (x1): https://www.jameco.com/z/WTJ-020-37A-2-1mm-Male-DC-Power-Jack-Breadboard-PCB-Mount-_2210677.html?CID=MERCH
* Pro Micro: https://www.sparkfun.com/products/12640
* NeoPixel (x6): https://www.adafruit.com/product/2869
* Button (x1): https://www.adafruit.com/product/482 (or similar)
* MG90S Servo 9G Micro Servo (x3): https://engineering.tamu.edu/media/4247823/ds-servo-mg90s.pdf
My schematic is attached. Please review and let me know if you have any comments. While I was working on the schematic I was thinking about the two 0.1uf capacitors near the NeoPixels. Those two are functionally "in the same place" in that they both connect the 5v source to ground. Do I need both of them? The way the schematic is drawn ether of those capacitors is protecting against power dips for both NeoPxel and the LED Button (i.e. everything running off the 5v rail); correct? Any reason to have 2 of them? If I needed that much capacitance couldn't I just use a single bigger one?

Original thread: https://www.eevblog.com/forum/projects/borderlands-style-jewelry-box-research-thread/
Youkai:
Anybody? If you could just verify that the circuit won't blow up and answer the question about the capacitors I would greatly appreciate it. Thank you!
InductorbackEMF:
Hi,the 100nf capacitor would be for noise/emi suppression and would be best being a smaller capacitance due to less ESR/ESL.
As such placing the capacitors as close to the Pixels/power supply rail would be best.

Alex.



InductorbackEMF:
Also i would say yes having both would help, keep in mind placing them fairly close to the supply for the pixels if you can.

Alex.
Prehistoricman:
Are you sure the 'LED Button' is right? What's the purpose of this pin 16 connection?
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