2 layers111.3 × 106.4 mm
Super Sixteen v1
matthewcieplak/super-sixteen
Code and schematics for the Super Sixteen Eurorack sequencer
141 parts171
2 layers60 × 80 mm
Voltmeter
zizofr/voltmeter_PCBa home made PCB of a digital voltmeter, embedded with a firmware to measure the electric tension
- Size
- 60 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 38
- Pads
- 105
- Tracks, vias
- 183, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 29 Aug 2026
- Updated
- 29 Aug 2026
Overview
Voltmeter is an open-source printed circuit board by zizofr, from the zizofr/voltmeter_PCB repository on GitHub. It is a 2-layer board of 60 × 80 mm with 28 parts on 38 nets, routed with 183 tracks and 0 vias.
It is built around the ATMEGA328P-PU and L7805. Its parts include 7 capacitors, 5 resistors, 5 diodes, 4 connectors and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA328P-PU
DIP-28-300mil-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH DIP-28-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.md⚡ Digital Voltmeter (Custom PCB & Hardware Design)
A compact digital voltmeter designed around a custom Printed Circuit Board (PCB) created in KiCad. This repository contains the complete hardware design files, schematics, Gerber manufacturing outputs, and board renders prior to final firmware integration.
🖼️ Hardware & PCB Gallery
Board Renders & Views
| Top View | Bottom View |
|---|---|
 |  |
| Perspective View 1 | Perspective View 2 |
|---|---|
 |  |
🛠️ Project Specifications & Features
- EDA Tool: KiCad
- Board Architecture: Custom 2-layer PCB
- Hardware Features:
- Dedicated analog front-end voltage divider circuit for signal attenuation.
- Onboard microcontroller interface for ADC sampling and processing.
- Display interface output.
- Optimized trace routing with solid ground plane shielding.
- Manufacturing Package: Full Gerber layer generation (F_Cu, B_Cu, Solder Masks, Silkscreens, and Drill files).
📂 Repository Structure
├── gerber/ # Production Gerber and drill files (.gbr, .drl)
├── view_1.png # High-resolution 3D renders (top, bottom, view_1, view_2)
├──view_2.png
├──top.png
├──bottom.png
├──firmware.ino # ATmega328P C++ source code
├── voltmeter.kicad_pcb # KiCad PCB board layout source file
├── voltmeter.kicad_sch # KiCad schematic design source file
└── README.md # Project documentationParts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C3, C5, C7, C8 |
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R4 |
| 2 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R5 |
| 2 | 22pF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2 |
| 2 | Conn_01x01 | Connector:Banana_Jack_1Pin | J3, J4 |
| 1 | 100mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 10k | Potentiometer_THT:Potentiometer_Bourns_3386P_Vertical | RV1 |
| 1 | 10µF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | 16MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D4 |
| 1 | 30k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 5.1V | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3 |
| 1 | ATmega328P-P | Package_DIP:DIP-28_W7.62mm | U1 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_Horizontal | J2 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | LCD-016N002L | Connector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_Vertical | LCD1 |
| 1 | LED | LED_THT:LED_D5.0mm | LED1 |
| 1 | SW_SPST | Button_Switch_THT:SW_SPST_Omron_B3F-40xx | SW1 |
Questions
How big is the Voltmeter PCB?
It measures 60 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Voltmeter use?
28 parts, built around the ATMEGA328P-PU and L7805. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Voltmeter KiCad files?
From the zizofr/voltmeter_PCB repository on GitHub, at the commit this page was made from: the board is voltmeter.kicad_pcb and its schematic voltmeter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Voltmeter design in my own project?
Its repository states no licence, so its author keeps all rights: ask zizofr before reusing the design.
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