Ruler
About the Ruler PCB
Ruler is an open source PCB design by kitspace, published on GitHub. It is a 2-layer board measuring 169.6 × 79.8 mm, with 79 components from 79 distinct parts.
Other key parts include the QFN-0.5mm, LQFP, SOIC-8, BGA-0.8mm and TSSOP. By type, the board carries 23 ICs, 8 switches, 8 capacitors, 7 transistors, 7 LEDs and 7 resistors.
It belongs with the sensors designs in this gallery.
From the project
The Kitspace PCB ruler
A PCB design reference ruler made using Inkscape, svg2shenzhen and KiCad (v5). It's up on Kitspace of course. You can buy it on Tindie while stocks last.
- You can use it as a ruler and as a reference for footprint sizes when working on a PCB design. - The front is a functioning circuit if you populate it. The LEDs will light up if you connect it via USB and press the buttons. - There are also pads for testing LED polarity. - It's in a panel to show off two different ways to attach designs within a panel: mouse-bites and v-score. These are indicated on the back as well.
Main components on the Ruler
Ruler bill of materials (BOM)
79 components, 79 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | QFN-0.5mm | QFN-16-1EP_3x3mm_Pitch0.5mm | U1 |
| 1 | LQFP | LQFP-32 | U2 |
| 1 | SOIC-8 | SOIC-8 | U3 |
| 1 | BGA-0.8mm | BGA-64-0.8mm | U4 |
| 1 | TSSOP | TSSOP-8_3x3mm_Pitch0.65mm | U5 |
| 1 | MSOIC | msoic-8 | U6 |
| 1 | TSOP-0.95mm | TSOP-6_1.65x3.05mm_Pitch0.95mm | U7 |
| 1 | SOT23-6 | SOT-23-6 | U8 |
| 1 | SOT23-8 | SOT-23-8 | U9 |
| 1 | SOT963-6 | SOT-963 | U10 |
| 1 | SSOP14 | SSOP-14 | U11 |
| 1 | SO16-L | SO-16-L | U12 |
| 1 | SOT666 | SOT-666 | U13 |
| 1 | SOT1194 | SOT-1194-1 | U14 |
| 1 | SOT1333 | SOT-1333-1 | U15 |
| 1 | SOT669 | SOT-669_LFPAK | U16 |
| 1 | TSSOP | TSSOP-8_4.4x3mm_Pitch0.65mm | U17 |
| 1 | SO4 | SO-4_4.4x2.3mm_Pitch1.27mm | U18 |
| 1 | VSSOP | VSSOP-8_2.3x2mm_Pitch0.5mm | U19 |
| 1 | TO-252/DPAK | TO-252-2 | U20 |
Show 59 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TO-277A | TO-277A | U21 |
| 1 | SOIC-16 | SOIC-16 | U22 |
| 1 | SOT563 | SOT-563 | U23 |
| 1 | SOT23 | SOT-23 | Q1 |
| 1 | SOT323 | SOT-323 | Q2 |
| 1 | SOT883 | SOT-883-B | Q3 |
| 1 | SOT523 | SOT-523 | Q4 |
| 1 | SOT223 | SOT223_GND_VO_VI | Q5 |
| 1 | SOT89 | SOT-89-3 | Q6 |
| 1 | SuperSOT | SuperSOT-3 | Q7 |
| 1 | WM17141 USB_OTG | conn_usb_B_micro_smd | J1 |
| 1 | Conn_01x01 | ruler | DRAWING1 |
| 1 | Conn_01x01 | diodes_text | DRAWING4 |
| 1 | Conn_01x01 | switches_text | DRAWING5 |
| 1 | Conn_01x01 | inductors_text | DRAWING9 |
| 1 | Conn_01x01 | tantalum_text | DRAWING10 |
| 1 | Conn_01x01 | electrolytic_text | DRAWING11 |
| 1 | KMR2 | SW_SPST_KMR2 | SW1 |
| 1 | EVQPE1 | SW_SPST_EVQPE1 | SW2 |
| 1 | B3U-1000P B3U1000P | Switch_Tactile_SMD_B3U-1000P | SW3 |
| 1 | 450-2133-1 FSMCT | FSMCT | SW4 |
| 1 | TL3315NF160Q TL3315 | Switch_4.5x4.5mm_SMD_TL3315NF160Q | SW5 |
| 1 | FSM2JSM | FSM2JSMA | SW6 |
| 1 | JS202011SCQN | Switch_Slide_JS202011SCQN | SW7 |
| 1 | KSR223 | KSR | SW8 |
| 1 | Conn_01x01 | leds_text | DRAWING2 |
| 1 | LED Tester | led_test_pads | LED1 |
| 1 | 516-3060-1 0402 | LED_0402_1005Metric | LED2 |
| 1 | 1080-1585-1 0603 | LED_0603_1608Metric | LED3 |
| 1 | 350-2947-1 0805 | LED_0805_2012Metric | LED4 |
| 1 | 350-2880 1206 | LED_1206_3216Metric | LED5 |
| 1 | 754-2024-1 0201 | LED_0201_0603Metric | LED6 |
| 1 | SMAJ12AB SMA | D_SMA | D1 |
| 1 | SMBJ12ALF SMB | D_SMB | D2 |
| 1 | SMCJ15CA-E3/57TGI SMC | D_SMC | D3 |
| 1 | 1N5711W-FDI SOD-123 | D_SOD-123 | D4 |
| 1 | S5GC-FDI SOD-323 | D_SOD-323 | D5 |
| 1 | BZX585-C2V7,115-ND SOD-523 Nexperia | D_SOD-523 | D6 |
| 1 | 1008 | Inductor_1008 | L1 |
| 1 | 8x8mm | Inductor_Taiyo-Yuden_NR-80xx | L2 |
| 1 | 4x4mm | Inductor_Taiyo-Yuden_MD-4040 | L3 |
| 1 | 5x5mm | Inductor_Taiyo-Yuden_MD-5050 | L4 |
| 1 | 6x6mm | Inductor_Taiyo-Yuden_NR-60xx | L5 |
| 1 | 2x2mm | Inductor_Taiyo-Yuden_NR-20xx | L6 |
| 1 | 3x5.3mm | CP_Elec_3x5.3 | C1 |
| 1 | 4x5.8mm | CP_Elec_4x5.8 | C2 |
| 1 | 5x5.8mm | CP_Elec_5x5.8 | C3 |
| 1 | 8x10mm | CP_Elec_8x10 | C4 |
| 1 | A/3216 | CP_Tantalum_Case-A_EIA-3216-18_Reflow | C5 |
| 1 | B/3528 | CP_Tantalum_Case-B_EIA-3528-21_Reflow | C6 |
| 1 | C/6032 | CP_Tantalum_Case-C_EIA-6032-28_Reflow | C7 |
| 1 | D/7343 | CP_Tantalum_Case-D_EIA-7343-31_Reflow | C8 |
| 1 | Conn_01x01 | resistors_text | DRAWING3 |
| 1 | 541-1.00KAB 1k | R_0201 | R1 |
| 1 | 541-1.00KL 1k | R_0402 | R2 |
| 1 | 541-1.00KH 1k | R_0603 | R3 |
| 1 | 541-1.00KC 1k | R_0805 | R4 |
| 1 | 541-1.00KF 1k | R_1206 | R5 |
| 1 | 541-4278-1 1k | R_01005_0402Metric | R6 |
Ruler design files
The KiCad project lives in the kitspace/ruler repository on GitHub; these links point at the commit this page was built from.
- Layoutruler.kicad_pcb
- BOM1-click-bom.csv
Ruler: common questions
How big is the Ruler PCB?
The Ruler measures 169.6 × 79.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ruler?
79 components, from 79 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 Ruler design files?
From the kitspace/ruler repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Ruler design in my own project?
The repository has no license, so all rights stay with kitspace. Use it as a reference, and ask the author before reusing the design.
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