What do the letters and numbers on a circuit board mean?

The letters indicate the type of component, and the number, defines which particular component of that type it is.

What are the codes in PCB?

Here is a short list of reference designators on PCBs:

• U: Integrated circuits.
• R: Resistors.
• L: Inductors.
• C: Capacitors.
• J: Connectors.
• T: Transformers.
• TP: Test points.
• P: Pads or pin headers.

What do PCB colors mean?

The color of PCB defines the color of the solder oil or solder mask. It consists of lacquer impregnated with pigments that are known for protecting the traces of bare copper. Made from glass – epoxy, the finishing color of PCB is representing the solder mask.

Why PCB is in green Colour?

But, why are printed circuit boards green? It is due to the solder mask, which protects the copper circuits printed on the fibre glass core to prevent short circuits, soldering errors, etc. The colour of the solder mask gives the board its appearance.

Does color of PCB matter?

PCB, so called printed circuit board, are offering a base that can connect electronic components. It’s color has no direct relation with its performance, the choice of solder mask color has no impact on electric performance. The material for PCB manufacturing is fiber glass and epoxy. …

How do you read a PCB board?

Start with an easy analog circuit, such as a guitar distortion pedal, and work your way up to more complicated versions. Make a drawing of the top of the circuit board. Show the positions of the capacitors, integrated circuits, resistors, transistors and other components. Review it to make sure everything is included.

What is U1 on a circuit board?

All the elements of a chip share the same designator, but generally have a suffix attached to describe the element. If our 74LS00 had a designator of U1, the gate using pins 1 through 3 might be called “U1A” or “U1-1.”