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Vumeter schematics

wyager·vumeter·schematics/tube-board/vumeter-schematics.kicad_pcb

Vumeter schematics PCB layout, top view — open source Microchip SAM board by wyager

About the Vumeter schematics PCB

Vumeter schematics is an open source Microchip SAM PCB design by wyager, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 30 mm, with 47 components from 20 distinct parts.

Its main chip is the ATSAMD11C14, from the Microchip SAM family. Other key parts include the LM358, LM1117-3.3, NCH8200HV and TPS2281DBVR. By type, the board carries 7 ICs, 7 connectors, 4 transistors and 2 jumpers.

It belongs with the audio, displays & leds and usb & debug tools designs in this gallery.

From the project

A nixie tube audio meter

Go into code/audioboard and code/tubeboard and run cargo build --release. (Without --release, the binaries may be too large.)

Plug your AVR-ICE or similar JTAG programmer into the tube board via the programming header and run ./program.sh.

Plug in your teensy over USB, put it in programming mode, and run ./program.sh

Get KiCad and open the schematics. How to export the schematics depends on your choice of PCB manufacturer. They should have instructions available online.

Vumeter schematics, from the project README
From the project README

Main components on the Vumeter schematics

LM358ATSAMD11C14LM1117-3.3NCH8200HVTPS2281DBVR

Vumeter schematics bill of materials (BOM)

47 components, 20 distinct parts.

QtyPartRefs
2
LM358
U1, U4
1
ATSAMD11C14
U2
1
LM1117-3.3
U3
2
NCH8200HV
U5, U6
1
TPS2281DBVR
U7
4
MJE340
Q1, Q2, Q3, Q4
1
SWD
J1
2
Conn_01x04
J2, J3
1
Standoff_1
J4
1
Standoff_2
J5
2
Conn_01x01_Male
J6, J7
5
0.1u
C_decouple1, C_pwm1, C_pwm2, C_pwm3, C_pwm4
2
10u
C_pwr1, C_pwr2
1
HV Bridge
JP1
1
HV_pwr
JP2
4
IN-13
N1, N2, N3, N4
4
550k
R_Cathode1, R_Cathode2, R_Cathode3, R_Cathode4
4
330
R_Sense1, R_Sense2, R_Sense3, R_Sense4
4
3266X >1k
R_adj1, R_adj2, R_adj3, R_adj4
4
5k
R_pwm1, R_pwm2, R_pwm3, R_pwm4

Vumeter schematics design files

The KiCad project lives in the wyager/vumeter repository on GitHub; these links point at the commit this page was built from.

Vumeter schematics: common questions

What microcontroller does the Vumeter schematics use?

The Vumeter schematics is built around the ATSAMD11C14, from the Microchip SAM family.

How big is the Vumeter schematics PCB?

The Vumeter schematics measures 100 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Vumeter schematics?

47 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Vumeter schematics design files?

From the wyager/vumeter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Vumeter schematics design in my own project?

Yes, under the terms of its MIT license, which wyager chose for the repository.

Can I test firmware for the Vumeter schematics without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Microchip SAM firmware against it before you order a PCB.

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