2 layers49 × 47.2 mm
BMP280Board
danheeks/vario
paragliding vario with arduino nano, piezo sounder, bmp180 altimeter, 4x Nimh batterys
6 parts11
2 layers47.9 × 49.6 mm
BMP280Tiny
danheeks/vario11paragliding vario with arduino nano, piezo sounder, bmp180 altimeter, 4x Nimh batterys
- Size
- 47.9 × 49.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 45
- Pads
- 136
- Tracks, vias
- 140, 18
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 8 Jan 2020
- Updated
- 26 Jun 2026
Overview
BMP280Tiny is an open-source printed circuit board by danheeks, from the danheeks/vario repository on GitHub. It is a 2-layer board of 47.9 × 49.6 mm with 45 parts on 45 nets, routed with 140 tracks and 18 vias.
It is built around the ATTINY88-AU, BMP280 and AMS1117-3.3, with the AMS1117-5.0 among its other parts. Its parts include 17 capacitors, 11 resistors, 6 ICs, 2 diodes and 2 inductors. It belongs with the power boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATTINY88-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 12MHz 28 512Byte 64Byte 8 Bit 8KB AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
BMP280
LGA-8(2x2.5)-40℃~+85℃ 0.12hpa 1.5pa/K 1.71V~3.6V 1hpa 300nA 30Kpa~1.1bar I2C、SPI Integrated ADC and digital interface、On-chip calibration and non-volatile storage、Standby mode、On-chip temperature output LGA-8(2x2.5) Pressure Sensors ROHSBoschPressure Sensors
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsAMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdvario
paragliding vario with arduino nano, piezo sounder, bmp280 altimeter, 9V battery
https://www.youtube.com/watch?v=9QVq33m_nv8
Instructions here https://github.com/danheeks/vario/tree/master/bmp280piezo
One battery lasted me two summers of amateur paragliding, maybe 50hrs, including a flight of 202km in the UK!
https://youtu.be/KGif6ZkmjKs?t=256
You can buy a kit to make your own for £10, doesn't include postage
It includes:
Tin
Arduino Nano
BMP280 sensor
Piezo Buzzer ( passive not active )
9V PP3 battery
battery connector and wires
On/Off switch
version 7 PCB ( currently waiting for an order, available around 20th June 2026 )
Sticker for front of tin
Or you can buy a working vario £20, doesnt' include postage, ( I have 2 in stock 6th June 2026 ).
Email danheeks@gmail.com for enquiries and to check on stock
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C5, C6, C10, C15 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R4, R5, R6, R7 |
| 6 | 22uF 16V X5R | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C7, C11, C12, C16, C17 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R10 |
| 2 | 10nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C8, C13 |
| 2 | 2.2uF 50V X5R | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C14 |
| 2 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D2 |
| 2 | LMR51430 | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U5, U6 |
| 2 | Piezo | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | H3, H4 |
| 1 | 13.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 22.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | 5.6uH | Library:L_Abracon_ASPI-0310FS | L2 |
| 1 | 6.8uH | Library:L_Abracon_ASPI-0310FS | L1 |
| 1 | 9V+ | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | H1 |
| 1 | 9V- | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | H2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | AMS1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | ATtiny88-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U1 |
| 1 | BMP280 | Library:Bosch_LGA-8_2x2.5mm_P0.65mm_ClockwisePinNumbering | U3 |
| 1 | LOGO | Library:House Martin | G*** |
| 1 | Programming Port | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | SW_DPST_x2 | Library:SW_19x12 | SW1 |
Questions
How big is the BMP280Tiny PCB?
It measures 47.9 × 49.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BMP280Tiny use?
45 parts, built around the ATTINY88-AU, BMP280, AMS1117-3.3 and AMS1117-5.0. 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 BMP280Tiny KiCad files?
From the danheeks/vario repository on GitHub, at the commit this page was made from: the board is BMP280Tiny/BMP280Tiny.kicad_pcb and its schematic BMP280Board/BMP280Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BMP280Tiny design in my own project?
Its repository states no licence, so its author keeps all rights: ask danheeks before reusing the design.
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