Voltmeter
About the Voltmeter PCB
Voltmeter is an open source AVR/Arduino PCB design by wolly981, published on GitHub. It is a board, with 58 components from 37 distinct parts.
Its main chip is the ATtiny84A-P, from the AVR/Arduino family. Other key parts include the MCP3204-CI/P, L7805CV, LM397 and RFM-0505S. By type, the board carries 31 resistors, 9 capacitors, 7 diodes, 6 ICs and 5 transistors.
From the project
Voltmeter project
Main components on the Voltmeter
Voltmeter bill of materials (BOM)
58 components, 37 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATtiny84A-P | DIP-14_W7.62mm | U1 |
| 1 | MCP3204-CI/P | PDIP14_300MC_MCH | U2 |
| 1 | L7805CV | TO-220_STM | U3 |
| 2 | LM397 | SOT-23-5 | U4, U5 |
| 1 | RFM-0505S | SIP4_RFM_RCP | U6 |
| 1 | PMOS | Q1 | |
| 1 | Q_NPN_CBE | Q2 | |
| 1 | Q_NMOS_DGS | Q3 | |
| 2 | LTV-849 | LTV-847_LTO | Q4, Q5 |
| 1 | LED | D1 | |
| 2 | 10Vbr | D2, D7 | |
| 2 | D | D3, D5 | |
| 1 | 43Vbr | D4 | |
| 1 | 5.1V | D6 | |
| 1 | 100nF | C_Axial_L5.1mm_D3.1mm_P15.00mm_Horizontal | C1 |
| 1 | 470nF 600V | C2 | |
| 1 | 0.33uF | C3 | |
| 2 | 100nF | C4, C7 | |
| 1 | 1nF | C_Axial_L5.1mm_D3.1mm_P7.50mm_Horizontal | C5 |
| 1 | 0.1uF | C6 |
Show 17 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 6.8uF | C8 | |
| 1 | 1uF | C9 | |
| 10 | 220 | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R1, R21, R22, R23, R24, R25, R26, R30 +2 |
| 4 | 100k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R2, R11, R12, R20 |
| 2 | 2M | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R3, R6 |
| 1 | 25k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R4 |
| 4 | 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R5, R27, R28, R29 |
| 1 | 287k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R7 |
| 1 | 1Meg | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R8 |
| 1 | 7.5Meg | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R9 |
| 1 | 95.3k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R10 |
| 1 | 4.7Meg | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R13 |
| 1 | 62k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R14 |
| 1 | 1k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R15 |
| 1 | 1.4M | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R17 |
| 1 | 200k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R18 |
| 1 | 6.2k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R19 |
Voltmeter design files
The KiCad project lives in the wolly981/Voltmeter repository on GitHub; these links point at the commit this page was built from.
Voltmeter: common questions
What microcontroller does the Voltmeter use?
The Voltmeter is built around the ATtiny84A-P, from the AVR/Arduino family.
How many components are on the Voltmeter?
58 components, from 37 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Voltmeter design files?
From the wolly981/Voltmeter repository on GitHub, which has the schematic, a netlist and the BOM; the links under Design files point to each one.
Can I use the Voltmeter design in my own project?
The repository has no license, so all rights stay with wolly981. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Voltmeter without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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