4 layers41.5 × 41.5 mm
ZenFly F71
LongDo1902/STM32_Drone
Developing quadcopter from scratch including stm32 programing and self-built flight controller PCB.
180 parts
2 layers32.9 × 24.2 mm
Dragonfly
ImShyMike/dragonfly1Tiny 3.5" FPV drone for highway
- Size
- 32.9 × 24.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 50
- Pads
- 190
- Tracks, vias
- 333, 74
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 14 Jun 2025
- Updated
- 30 Jun 2025
Overview
Dragonfly is an open-source printed circuit board by ImShyMike, from the ImShyMike/dragonfly repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 32.9 × 24.2 mm with 49 parts on 50 nets, routed with 333 tracks and 74 vias.
It is built around the DEA142450BT-3024A1, ESP8285 and SE2431L-R, with the SX1280IMLTRT and AMS1117 among its other parts. Its parts include 20 capacitors, 9 resistors, 4 ICs, 3 inductors and 2 connectors. It belongs with the robots and motor control boards and the ESP8266 boards of this library.
Main components
5
DEA142450BT-3024A1
SMD-5P,1.4x1.1mm-40℃~+85℃ 1.1dB 23dB 50Ω Bandpass SMD-5P,1.4x1.1mm RF Filters ROHSTDKRF Filters
ESP8285
QFN-32-EP(5x5)-40℃~+125℃ -91dBm 170mA 2.4GHz 2.4GHz~2.4835GHz 20.5dBm 3V~3.6V 56mA 72.2Mbps SPI、UART、ADC、I2C、I2S、PWM、SDIO WiFi transceiver QFN-32-EP(5x5) RF Transceiver ICs ROHSEspressif SystemsRF Transceiver ICs
SE2431L-R
QFN-24-EP(3x4)-40℃~+125℃ 2.4GHz~2.483GHz 22dB 2V~3.6V 2dB Low power mode、Digital control interface QFN-24-EP(3x4) RF Amplifiers ROHSSkyworks SolutionsRF Amplifiers
SX1280IMLTRT
QFN-24-EP(4x4)-132dBm -40℃~+85℃ 1.8V~3.7V 12.5dBm 2.4GHz 2.4GHz~2.5GHz 24mA 8.2mA SPI、UART Supports RSSI function transceiver QFN-24-EP(4x4) RF Transceiver ICs ROHSSEMTECHRF Transceiver ICs
AMS1117
1.0 A Low-Dropout Fixed RegulatorAdvanced Monolithic SystemsUncategorised
README
README.mddragonfly
A tiny 3.5" FPV drone for highway with a fully custom frame, corners, softmounts and ELRS receiver.
I've seen many FPV videos and always thought that it was really cool. Only issue is that I only own a small toy drone without a camera.
When highway released I thought it would be a great oportunity to learn what goes into designing your own FPV drone. After alot of research I managed to make a decent looking frame and find parts that could keep the cost reasonably low.
Render
The model with sample props, motors and camera (along with a 15cm ruler for scale).
BOM
| Part | Qty | Price (USD) | Link |
|---|---|---|---|
| SpeedyBee F405 Mini BLS 35A 20×20 Stack | 1 | 60.00 | https://www.speedybee.com/speedybee-f405-mini-bls-35a-20x20-stack |
| 20 mm Aluminum Standoffs (pack) | 1 | 1.86 | https://pt.aliexpress.com/item/1005007945167923.html |
| HQProp 3525 Prop Set | 1 | 3.31 | https://pt.aliexpress.com/item/1005008744409414.html |
| CADDX ANT Camera | 1 | 13.98 | https://pt.aliexpress.com/item/1005006086694992.html |
| Omnidirectional Antenna Pair | 1 | 2.46 | https://pt.aliexpress.com/item/1005007126266614.html |
| YSIDO 1505 2650KV Brushless Motor Set | 1 | 29.11 | https://pt.aliexpress.com/item/1005007544080274.html |
| HGLRC Zeus Nano VTX | 1 | 22.96 | https://pt.aliexpress.com/item/1005008043478143.html |
| Mini RHCP 5.8 GHz Lollipop Antenna (UFL) | 1 | 5.34 | https://pt.aliexpress.com/item/4001365632031.html |
| Total | 139.02 |
The current price of the ELRS receiver is 69.60$ and using the cheapest shipping the total is at 215.91$.
The BOM does not account for the frame and battery as I couldn't get that under 150$ D:
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1.2pF | Capacitor_SMD:C_0402_1005Metric | C14, C15, C16, C20 |
| 4 | 100nF | Capacitor_SMD:C_0402_1005Metric | C5, C9, C10, C18 |
| 4 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4 |
| 4 | 10pF | Capacitor_SMD:C_0402_1005Metric | C6, C7, C17, C19 |
| 4 | Conn_01x01_Female | TestPoint:TestPoint_Pad_2.5x2.5mm | 5V1, GND1, RX1, TX1 |
| 2 | 10nF | Capacitor_SMD:C_0402_1005Metric | C3, C8 |
| 2 | 3n | Inductor_SMD:L_0402_1005Metric | L2, L3 |
| 2 | Conn_Coaxial | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | CN1, CN2 |
| 2 | MountingHole_2.2mm_M2 | MountingHole:MountingHole_2.2mm_M2 | M2, M2 |
| 1 | 1.2k | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 12k | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 15u | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | 1uF 25v | Capacitor_SMD:C_0402_1005Metric | C11 |
| 1 | 2.2k | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C13 |
| 1 | 25V 1uF | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 26Mhz | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | 3.3k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 470nF, 10V | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | 52Mhz, 8pF | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y2 |
| 1 | AMS1117 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | LDO1 |
| 1 | DEA142450BT-3024A1 | FILTER2:RF_3024A1_TDK | U4 |
| 1 | ESP8285 | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SE2431L-R | LNA:SE2431L_SKY | U3 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_B3U-1000P-B | SW1 |
| 1 | SX1280IMLTRT | LORA:XCVR_SX1280IMLTRT | U2 |
Questions
How big is the Dragonfly PCB?
It measures 32.9 × 24.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Dragonfly use?
49 parts, built around the DEA142450BT-3024A1, ESP8285, SE2431L-R and SX1280IMLTRT. 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 Dragonfly KiCad files?
From the ImShyMike/dragonfly repository on GitHub, at the commit this page was made from: the board is PCB/dragonfly/dragonfly.kicad_pcb and its schematic PCB/dragonfly/dragonfly.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Dragonfly design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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