Jump to content
Electronics-Lab.com Community
KrisDong

Comments on a metronome schematic and board?

Recommended Posts

I've been working on metronome based on the Atmega328P and the Arduino language, although using a discreet microcontroller chip. It has six high brightness LEDs to indicate the beats, a buzzer, OLED display, some push buttons to control the thing, some more indicator LEDs and a 3,7 V LiPo battery with a 3.3 V voltage regulator, a charging controller and a micro USB port for charging. Before having the first prototype manufactured, if anyone could comment on what I've made so far I'd be very grateful.

My aim was to make the whole thing quite small, so I've gone mostly SMD (0603 for capacitors and resistors, 1206 for LEDs). The important thing for me is the visibility of the beat LEDs (D3...D8), so I may still exchange them for 3 mm though-hole LEDs. Some of the components are hidden under the display, but they're all on the front side of the board; the only thing on the back is the battery and a ground plane. I'll be ordering the PCBs from PCBGOGO and soldering the components by hand.

Images of the schematic and the PCB layout.

PDF of the schematic.

ZIP package of the gerber files.

Thank you!

Edit: One thing I'm especially unsure about is whether I have enough bypass caps around the microcontroller and if they're correctly sized and placed. What I have is mostly copied from the Arduino Nano schematic.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...