4reel
About the 4reel PCB
4reel is an open source PCB design by o7-machinehum, published on GitHub under the MIT license. It is a 4-layer board measuring 117.5 × 30 mm, with 155 components from 50 distinct parts.
Other key parts include the RV1106G3, EA3036CQBR, OV9281, TLV73312PDBV and TPD2EUSB30ADRTR. By type, the board carries 90 capacitors, 35 resistors, 11 inductors, 10 ICs, 4 connectors and 3 crystals.
From the project
4reel is a camera used to verify a scene actually happened.
Ovrdrive -------- Size : 36.6 x 15 mm Layer : 4 Layers Material : FR-4: TG150 Thickness : 1.6 mm nominal (PCBWay regular 4-layer construction) Min track/spacing : 4/4mil Min hole size : 0.2mm Solder mask : Black Silkscreen : White Edge connector : No Surface finish : HASL lead free Via process : Tenting vias Finished copper : 1 oz Cu (Inner Copper:1 oz) Remove product No. : Yes
Main components on the 4reel
4reel bill of materials (BOM)
155 components, 50 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RV1106G3 Rockchip | Rockchip_QFN-128-1EP_12.3x12.3mm_P0.35mm_EP7x7mm | U1 |
| 1 | EA3036CQBR EA3036C | QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm | U2 |
| 2 | OV9281 ImageSensor_OV9281 OmniVision | OV9281 | U3, U9 |
| 1 | TLV73312PDBV | SOT-23-5 | U4 |
| 1 | TPD2EUSB30ADRTR TPD2EUSB30 | Texas_DRT-3 | U5 |
| 1 | TLV73328PDBVR TLV73328PDBV | SOT-23-5 | U6 |
| 1 | W25Q32JVZPIQ TPS62A01ADRL | SOT-563 | U7 |
| 1 | LIS2HH12TR LIS2HH12 | LGA-12_2x2mm_P0.5mm | U8 |
| 1 | RTL8723DS | RTL8723 | U10 |
| 2 | SX5M24.000D20F30TNN TXC-7C | Oscillator_SMD_TXC_7C-4Pin_5.0x3.2mm | Y1, Y3 |
| 1 | ECS-240-8-37B-CKY-TR 24Mhz | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y2 |
| 1 | USB4105-GF-A-120 USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | DM3AT-SF-PEJM5 Micro_SD_Card_Det2 | microSD_HC_Hirose_DM3AT-SF-PEJM5 | J2 |
| 1 | HRS U.FL-R-SMT-1(80) Conn_Coaxial | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J3 |
| 1 | SM04B-SRSS-TB JST | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4 |
| 2 | LTST-C281KGKT LED | LED_0402_1005Metric | D1, D2 |
| 3 | DFE252012P-1R5M=P2 1.5uH | L_1008_2520Metric | L1, L2, L3 |
| 6 | MLP2012S3R3MT0S1 3u3/0.9A | L_0805_2012Metric | L4, L5, L6, L7, L8, L9 |
| 1 | BLM18KG121TN1D 120R@100MHz | L_0603_1608Metric | L10 |
| 1 | DFE252012P-1R0M=P2 1uH | L_1008_2520Metric | L11 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 21 | CL05B104KP5VPNC 100nF | C_0402_1005Metric | C1, C14, C15, C16, C36, C37, C41, C42 +13 |
| 23 | GRM155R60J106ME05D 10uF | C_0402_1005Metric | C2, C3, C4, C5, C7, C9, C10, C12 +15 |
| 3 | GCM1555C1H221JA16D 220pF | C_0402_1005Metric | C6, C8, C11 |
| 4 | CL05B104KP5VPNC 100nF | C_0201_0603Metric | C18, C24, C28, C75 |
| 22 | C0402C105K9PACTU 1uF | C_0402_1005Metric | C29, C30, C33, C34, C35, C39, C40, C43 +14 |
| 2 | GCM1555C1H100JA16D 10pF | C_0402_1005Metric | C32, C38 |
| 9 | 100nF | C_0201_0603Metric | C76, C78, C80, C86, C87, C88, C89, C90 +1 |
| 1 | 10uF | C_0402_1005Metric | C77 |
| 5 | LMK107BBJ106MALT 10uF | C_0603_1608Metric | C81, C83, C84, C85, C92 |
| 1 | RC0402FR-0740K2L 40.2k | R_0402_1005Metric | R1 |
| 1 | RC0402FR-079K1L 9.1k | R_0402_1005Metric | R2 |
| 1 | RC0402FR-0747KL 47k | R_0402_1005Metric | R3 |
| 3 | RC0402FR-07100KL 100k | R_0402_1005Metric | R4, R6, R9 |
| 2 | RC0402FR-07200KL 200k | R_0402_1005Metric | R5, R7 |
| 1 | RC0402FR-0710KL 10k | R_0402_1005Metric | R8 |
| 1 | RC0402FR-07240RL 240R | R_0201_0603Metric | R10 |
| 4 | RC0402FR-074K7L 4.7k | R_0402_1005Metric | R11, R12, R21, R22 |
| 3 | RC0402FR-070RL 0R | R_0402_1005Metric | R13, R30, R32 |
| 2 | RC0402FR-075K6L 5.6k | R_0402_1005Metric | R14, R15 |
| 1 | RC0402JR-071KL 100k | R_0402_1005Metric | R16 |
| 1 | RC0402JR-071KL 80k | R_0402_1005Metric | R17 |
| 1 | RC0402FR-0722RL 22R | R_0402_1005Metric | R19 |
| 1 | RC0402FR-071ML 1M | R_0402_1005Metric | R20 |
| 2 | RC0402FR-071KL 1k | R_0402_1005Metric | R23, R24 |
| 2 | RC0201FR-0722RL 22R | R_0201_0603Metric | R27, R28 |
| 2 | RC0402JR-071KL 1k | R_0402_1005Metric | R29, R33 |
| 1 | RC0402FR-13100KL 100k | R_0402_1005Metric | R34 |
| 1 | RC0402JR-0710KL 10k | R_0402_1005Metric | R35 |
| 2 | CAT10-473J4LF 47k | R_Array_Concave_4x0402 | RN1, RN2 |
| 2 | 4D02WGJ0103TCE 10k | R_Array_Convex_4x0402 | RN3, RN4 |
4reel design files
The KiCad project lives in the o7-machinehum/4reel repository on GitHub; these links point at the commit this page was built from.
4reel: common questions
How big is the 4reel PCB?
The 4reel measures 117.5 × 30 mm, has 4 copper layers and is 1.561 mm thick.
How many components are on the 4reel?
155 components, from 50 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 4reel design files?
From the o7-machinehum/4reel repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the 4reel design in my own project?
Yes, under the terms of its MIT license, which o7-machinehum chose for the repository.