Nanit
About the Nanit PCB
Nanit is an open source AVR/Arduino PCB design by andykarpov, published on GitHub. It is a 2-layer board measuring 31.2 × 53.3 mm, with 73 components from 46 distinct parts.
Its main chip is the ATmega328P, from the AVR/Arduino family. Other key parts include the LTC4054ES5-4.2 and CH340G. By type, the board carries 26 capacitors, 19 resistors, 6 diodes, 3 ICs, 3 transistors and 3 connectors.
From the project
Alternate PCB for NANIT project https://radiokot.ru/circuit/digital/measure/117/
The original article: https://radiokot.ru/circuit/digital/measure/117/
- Added factory manufactured SMD transformer instead of hand-made coil - Added LED driver for display backlight
https://oshpark.com/shared_projects/OVV7hNvF
Main components on the Nanit
Nanit bill of materials (BOM)
73 components, 46 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LTC4054ES5-4.2 | TSOT-23-5 | U1 |
| 1 | ATmega328P | TQFP-32_7x7mm_P0.8mm | U2 |
| 1 | CH340G | SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | BC857 | SOT-23 | Q1 |
| 1 | IRLML6344 | SOT-23 | Q2 |
| 1 | BC847 | SOT-23 | Q4 |
| 1 | 32.768 KHz | Crystal_C38-LF_D3.0mm_L8.0mm_Horizontal | Y1 |
| 1 | 12 MHz | Crystal_HC49-U_Vertical | Y2 |
| 1 | USB_B_Micro | USB_Micro-B_Amphenol_10118194_Horizontal | J1 |
| 1 | AVR-ISP-6 | PinHeader_2x03_P2.54mm_Vertical_SMD | J2 |
| 1 | SSD1306 OLED 128x64 0.96" | SSD1306_ribbon | P1 |
| 1 | 3.7V | PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | Buzzer | PinHeader_1x02_P2.54mm_Vertical | BZ1 |
| 1 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm | JP2 |
| 1 | SolderJumper_3_Bridged12 | SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm | JP3 |
| 1 | SBM-10 (SBM-21) | SBM-21 | S1 |
| 1 | Button 1 | SW_PUSH_6mm | SW1 |
| 1 | Button 2 | SW_PUSH_6mm | SW2 |
| 1 | CEEH54 | CEEH54 | TR1 |
Show 26 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Charging | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | 1N4148 | D_MiniMELF | D4 |
| 3 | US1M | D_SMA | D5, D6, D7 |
| 1 | 18v (BZV55C18) | D_MiniMELF | D8 |
| 2 | 10uH | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L1, L2 |
| 9 | 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C4, C6, C7, C8, C10, C17, C18 +1 |
| 1 | 1uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2 |
| 1 | 10uF | CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C3 |
| 2 | 22pF* | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C5, C11 |
| 1 | 10pF 1000V (C17UL100J-7ZN-X1T) | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C9 |
| 1 | 220pF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C12 |
| 3 | 100nF 600V | C_1812_4532Metric_Pad1.30x3.40mm_HandSolder | C13, C14, C15 |
| 1 | 47uF | CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C16 |
| 4 | 1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C20, C21, C22, C23 |
| 2 | 4u7 | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C24*1, C25 |
| 1 | 2u2 | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C26 |
| 1 | 300 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 1 | 10k* | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2 |
| 1 | 4k7 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3*1 |
| 1 | 390..910k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4*1 |
| 6 | 10k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R7, R8, R11, R12, R13, R14 |
| 1 | 1k5 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R10 |
| 1 | 750 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R15 |
| 4 | 1M | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R16, R18, R19, R20 |
| 1 | 20 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R17 |
| 2 | 2M | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R21, R22 |
Nanit design files
The KiCad project lives in the andykarpov/nanit repository on GitHub; these links point at the commit this page was built from.
- Layoutpcb/revC/nanit.kicad_pcb
- Schematicpcb/revC/nanit.kicad_sch
Nanit: common questions
What microcontroller does the Nanit use?
The Nanit is built around the ATmega328P, from the AVR/Arduino family.
How big is the Nanit PCB?
The Nanit measures 31.2 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Nanit?
73 components, from 46 distinct parts. The full bill of materials is listed on this page.
Where can I download the Nanit design files?
From the andykarpov/nanit repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Nanit design in my own project?
The repository has no license, so all rights stay with andykarpov. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Nanit 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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