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00:50
Resistor Color Codes: Read Them in Seconds
This short explains the IEC 60062 color-band system used to identify axial through-hole resistors in PCB prototyping, incoming inspection, and mixed-technology assembly. It shows how four-band resistors use two significant digits, a multiplier, and tolerance, while five-band resistors add a third significant digit. The video compares two factory-typical examples—brown-black-orange-gold and brown-black-black-red-gold—which both indicate 10 kΩ ±5%, but use different band configurations. Correctly reading the band sequence helps prevent value and polarity-related assembly mistakes on FR4 PCB prototypes, industrial control boards, and consumer electronics, especially for pull-ups, voltage dividers, and current-limiting circuits. Always verify the resistor value against the BOM before moving from PCB prototyping to PCBA production or requesting a PCB assembly quote.
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00:54
PCB Fiducial Mark: SMT Alignment & DFM Rules
This video explains the small exposed copper circles found on PCB panel rails and boards: fiducial marks. These marks serve as optical reference points for stencil printers, pick-and-place machines, SPI, and AOI systems, helping equipment determine board position, rotation, and alignment. The video distinguishes global, panel, and local fiducials and covers practical placement considerations such as spacing, solder-mask clearance, mark size, and edge clearance. These details become especially important for HDI PCB, 4-layer PCB, and double-sided SMT designs moving from PCB prototype to turnkey PCB assembly, where accurate fiducial placement supports reliable automated assembly and inspection.
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00:37
Decode PCB Markings Part 2: Power Rails, Serial Buses, and Control Labels
This 36-second AIVON short explains the functional and net labels printed next to connectors, headers, and test pads on production PCBs. Unlike component reference designators, labels such as GND, VCC, VBUS, VBATT, 3V3, TXD/RXD, SDA/SCL, ON/OFF, BOOT, RESET, and TP identify electrical nets, power rails, communication signals, and key control points. The video shows how engineers use these markings during PCB prototype bring-up, first-article inspection, and turnkey PCB assembly to quickly identify where to probe, which rail to verify, and which pads control startup or reset. These labels are especially useful when reviewing Gerbers, preparing test fixtures, or troubleshooting USB-powered consumer electronics, battery-powered devices, and industrial control PCBs before production.
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00:44
Decode PCB Markings Video: Read R1 C2 U1 Fast
This one-minute AIVON short explains how to decode PCB silkscreen reference designators printed next to components on a finished board. It introduces common prefixes such as R for resistors, C for capacitors, L for inductors, D for diodes and LEDs, U for ICs, Q for transistors or MOSFETs, F for fuses, FB for ferrite beads, SW for switches, J for connectors, TP for test points, and Y for crystals or oscillators. The video shows how identifiers such as R1 and C2 help engineers match components to the BOM, navigate populated FR4 PCBs, support PCB prototyping and turnkey PCB assembly, and troubleshoot first articles. Clear reference markings also reduce polarity mistakes, simplify testing, and keep assembly documentation aligned with the physical board.
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00:54
Positive vs. Negative PCB Processing: How Circuits Are Formed
This video explains how finished copper circuitry is formed from a copper-clad panel using the two primary PCB fabrication routes: positive processing and negative processing. It compares the complete manufacturing sequences, showing how positive processing uses plated copper and tin as an etch resist for outer-layer pattern plating, while negative processing protects the circuit pattern and etches away unwanted copper, making it widely used for many inner layers. The video highlights why this process choice is a DFM consideration rather than simply a layout preference, as stack-up, copper weight, minimum trace and spacing, and plated-hole requirements all influence the appropriate method. These principles are especially relevant to multilayer FR4 PCB, HDI PCB, and PCB prototype production, where process selection directly affects etch accuracy, plating thickness, yield, and manufacturing reliability.
