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Free PCB Ruler Give Away by PCBONLINE - How to Get and Use It?

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Thur, Jul 22, 2021


A PCB ruler usually costs several dollars. But here comes a bonus for everyone - PCBONLINE gives PCB rulers for FREE! How to get a PCB ruler from PCBONLINE free of charge, and what is it like?

A PCB ruler is an auxiliary tool for PCB, hardware, and mechanism design. It is used to compare component sizes and used as a normal ruler to measure.

But I think what you most want to know is how to get a free PCB ruler from PCBONLINE. It is so easy! All you need is to input "I want a free PCB ruler" in your online order description box. Don't worry. PCBONLINE, a one-stop advanced PCB manufacturer, sets no minimum quantity limit and has no hided costs. You can understand that a PCB ruler is one of the many gifts PCBONLINE provides.

free PCB ruler online order

What Does PCBONLINE's PCB Ruler Look Like?

PCBONLINE's PCB ruler is brown, and the surface is matte and feels smooth. It is copper-plated and made of FR4 material. On the upper and bottom edges of the front side, length scales are printed. And on both sides of the ruler, holes/pads of different sizes and their instructions are drilled/printed.

Let's look at the front side of the PCB ruler first.


PCBONLINE's PCB rulers have two measurement units: centimeters and inches. The upper edge shows the 30cm specification, but its actual measurement range is 30.5cm. The measurement range on the bottom edge is 12 inches.

In the body of the ruler's front side, we can see four boxes from left to right.

PCB ruler inductors

The first box is the inductors. Here are 9 pairs of PCB pads (unit: mm×mm): 17×9, 13×13, 10×10, 10×7, 7×7, 6×6, 4×4, 3×3, and 2×2.

PCB ruler RLC

The second box is the RLC circuit (a circuit consists of connected in series or paralleled resistor, inductor, and capacitor). Here lists different packaging sizes and prints their pads: 01005, 0201, 0402, 0603, 0805, 1206, 1210, and 2512. Next to the pads, the EIA in power that the component has is printed: 1/32W, 1/20W, 1/16W, 1/10W, 1/8W, 1/4W, 1/2W, and 1W. When you design circuits, you can use the ruler as a reference to compare the pad sizes of components and their power.

PCB ruler polarized caps

The third box is the polarized caps. Here are 12 groups of PCB pads, and their names are: D50, D60, D80, D100, TH D100, TH D80, TH D60, TH D50, 7342/D Case 2916, 6032/C Case 2414, 3528/B Case 1411, and 3216/A Case 1206. The positive electrode is marked, and two holes of the TH D series of polarized caps are drilled. These PCB pads are standard and the same on real PCBs. (In fact, a PCB ruler is manufactured as a PCB). So when you are not sure the size of the polarized cap in your design, look at PCBONLINE's PCB ruler.

PCB ruler IC pads

The fourth box is the ICs. Here contains many types and sizes. The LDOs (low-dropout) include MLF6, BGA5, and BGA4; the LEDs include 1210, 0603, dual, and edge; the diodes include SMA, SMB, SMC, SOD123, SOD323, SOD523, and SOD923; SMD crystals include 1612, 2012, 2016, 3215, and HC49S. Other ICs are D-PAK, SOT23-6, SOT363, SOT563-6, SOT223, SOT23, SOT323, SOT723, LFPAK_8, SOP8, XSOP12, and XSOP08. The PCB ruler lists almost all the frequently-used ICs and prints their PCB pads for your reference.

Now let's turn the PCB ruler to the backside and take a look from left to right.

PCB ruler AWG

The PCB ruler shows the wire's AWG number, diameter, and resistance. And wire holes are drilled in the chart. At the bottom of the chart, the formulas to calculate the copper wire's resistance are printed. When you design the circuits and are not sure about the line gauge, you can get a reference from the handy PCBONLINE's PCB ruler.

PCB ruler PCB pads

Then, in the mid of the ruler's backside, there are still PCB pads of different chips and components. If you are not very familiar with QFNs, QFPs, BGAs, and TFBGAs, this ruler will help you identify them from their PCB pads. On the PCB ruler, the QFNs include QFN156, QFN10, QFN20, QFN56, QFN48, QFN40, and QFN24; the QFPs include QFP64 and QFP48; the BGAs include BGA56, BGA82, BGA96, BGA170, BGA0200, and BGA0170; other BGAs include LFBGA448_18×18, LFBGA354_16×16, TFBGA257_12×12, and TFBGA257_10×10. The pin pitch number is also marked for every BGA, QFN, and QFP. And the length that the pin pitch number stands for is also marked in the small pin pitch box.

PCB ruler tables

On the right of the PCB ruler's backside, six boxes and one chart will help you calculate the circuit's different specifications such as trace with, resistance, current, voltage, copper thickness, hole diameter, etc.

Lastly, please stay relaxed to use PCBONLINE's PCB ruler. The ruler is RoHS compliant and is safe to touch and use.

Are you Interested in the Free PCB Provider PCBONLINE?

PCBONLINE is a leading PCB manufacturer and assembler for medical, aerospace, defense, automotive, industrial, communications, and consumer electronics. It was built in 1999, and it has three manufacturing bases. Here are some advantages of PCBONLINE:


  • Has strong manufacturing capabilities for HDI, ceramic, rigid-flex, flexible, multilayer, high-frequency, carbon ink, and high-TG PCBs.
  • Free one-on-one engineering support (DFX) for every client.
  • Free BOM checks for PCB assembly (components can be both provided by PCBONLINE or clients).
  • Free complete PCBA and functional PCBA tests to $5000+ orders.
  • PCB manufacturing following IPC-A-600 standards, PCB assembly following IPC-A-610 Class 3 standards.

Online register and get $100 coupons for online purchases. And when you get a quote, remember to enter that you need a PCB ruler so that PCBONLINE will put a ruler in the product box for you.