If you solder up a surface mount component and you will find that they are too small parts.
There's dozens of different names including QFN, TDFN, SOIC, SOP, J-Lead and so on. What do they mean and how can you tell how big they are?
Now you can have a reference board at your fingertips, with this snazzy PCB reference ruler!!
This versatile PCB ruler, it also integrates relevant information for PCB design such as angle gauges, devices, IC pin spacing tables, and more.
Electronic enthusiasts in the design process in urgent need of a measurement tool can be set all the necessary functions.
In addition to measuring the basic functions of millimeter and inch sizes, it also integrates relevant information for PCB design such as angle gauges, devices,
IC pin spacing tables, Resistor and capacitor chip package, the commonly used diameter reference drill, line width size reference We printed this information on FR-4 gold-plated PCBs. R-4 gold-plated PCB, high-end atmosphere, high hardness, wear resistance
This standard-thickness FR4, gold plate ruler has the most common component packages you'll encounter.
It has font size guide, trace-width diagram, and a set of AWG-sized drills so you can gauge your wire thicknesses.
Edges are labeled in inches with 1/8th marks and cm with 0.1cm marks.
2 x PCB Rulers