kkingsbe/AltimeX-Skydiving-Altimeter-PCB1This repo contains the PCB files for an open-source ColorAlti analog that I created, which can be made for about $30.
Skydiving altimeter is an open-source printed circuit board by kkingsbe, from the kkingsbe/AltimeX-Skydiving-Altimeter-PCB repository on GitHub. It is a 2-layer board of 26.3 × 45.1 mm with 38 parts on 81 nets, routed with 346 tracks and 52 vias.
It is built around the LPS22HB, RP400N501A-TR-FE and LDL1117S33R, with the 10118193-0001LF and SP0503BAHTG among its other parts. Its parts include 11 capacitors, 9 resistors, 7 ICs, 5 diodes and 4 connectors. It belongs with the STM32 boards of this library.
This repo contains the PCB files for an open-source ColorAlti analog that I created, which can be made for about $30. Sadly, the programmer cable costs anywhere from $60-$120, however if you need yours programmed you can reach out to me and we can work something out (I have one).
This is still an active work in progress. A LiPo with a capacity of at least 250mAh should be fine since the current draw of the board is minimal. The CAD files for an enclosure that can fit in the audible pocket on helmets will be up soon once tested.
| Part | Part Number | Price (per item) | Amount | Link |
|---|---|---|---|---|
| MCU | STM32F103 | $6.66 | 1 | Click Here |
| LED Strip | WS2813B | $15.00 | 1 | Click Here |
| Boost Converter | RP400N501A-TR-FE | $1.48 | 1 | Click Here |
| Linear Regulator | LD1117S33TR | $0.66 | 1 | Click Here |
| Schottky Diode | RSX101MM-30TFTR | $0.45 | 1 | Click Here |
| 10uh Inductor | ASPI-0630LR-100M-T15 | $0.83 | 1 | Click Here |
| 10uF Capactior | $0.25 | 3 | Click Here | |
| 4.7uF Capacitor | $0.10 | 1 | Click Here | |
| 100nF Capacitor | $0.10 | 7 | Click Here | |
| JTAG Connector | FTSH-105-01-H-DV-K-P-TR | $5.63 | 1 | Click Here |
| 4.7k Resistor | $0.10 | 2 | Click Here | |
| 500 ohm Resistor | $2.64 | 1 | Click Here | |
| 1M Resistor | $0.10 | 1 | Click Here | |
| 10MHz Resonator | $0.24 | 1 | Click Here | |
| SMD LED | $0.26 | 1 | Click Here | |
| Micro USB Port | $0.46 | 1 | Click Here | |
| Baro Sensor | LPS22HBTR | $2.13 | 1 | Click Here |
| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_SMD:C_0805_2012Metric | C2, C3, C4, C5, C6, C7, C15 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric | C13, C14, C16 |
| 3 | 1k | Resistor_SMD:R_0805_2012Metric | R7, R8, R9 |
| 3 | LED | Diode_SMD:D_0603_1608Metric | D1, D3, D4 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | CAT24M01W | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6, U7 |
| 1 | 10118193-0001LF | Micro USB Port:AMPHENOL_10118193-0001LF | J5 |
| 1 | 10uH | ASPI-0630LR-100M-T15 10uH inductor:IND_ASPI-0630LR-100M-T15 | L1 |
| 1 | 1M | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 22.1k | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 47.5k | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 500 | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | Battery JST Connector | S2B-PH-K-S(LF)(SN) 2mm JST Connector:JST_S2B-PH-K-S(LF)(SN) | J2 |
| 1 | CP2102N-Axx-xQFN24 | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U3 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J1 |
| 1 | D_Schottky | Diode_SMD:D_SOD-123F | D6 |
| 1 | LDL1117S33R | Package_TO_SOT_SMD:SOT-223 | U5 |
| 1 | LPS22HB | Package_LGA:ST_HLGA-10_2x2mm_P0.5mm_LayoutBorder3x2y | U2 |
| 1 | RP400N501A-TR-FE | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | Resonator | JGC42-8828A_CSTNE10M0G550000R0:JGC42-8828A_CSTNE10M0G550000R0 | Y1 |
| 1 | SP0503BAHT | Package_TO_SOT_SMD:SOT-143 | D2 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
It measures 26.3 × 45.1 mm and has 2 copper layers, 1.6 mm thick.
38 parts, built around the LPS22HB, RP400N501A-TR-FE, LDL1117S33R and 10118193-0001LF. 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.
From the kkingsbe/AltimeX-Skydiving-Altimeter-PCB repository on GitHub, at the commit this page was made from: the board is skydiving-altimeter/skydiving-altimeter.kicad_pcb and its schematic skydiving-altimeter/baro_sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask kkingsbe before reusing the design.
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