The main difference is that the volume of production for board-mounted AC-DC converters is very low, so you pay a boutique price.
Decent quality fully approved (safety and EMC) wall-wart adapters are made in huge volume so the costs are relatively low.
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#PCB Assembly
I want to put decoupling caps (0603) as close as possible to TQFP-48-7×7. So PCB/assembly wise how close I can put them (pad to pad, component to component)?
Does the ‘court yard’ need to be exactly square, or is it ok to place mentioned caps closer to TQFP in the corners where the TQFP pins leave kind of ‘free space’?
I’m trying to decide whether to order components direct from manufacturers in China or from distributors in the US. If I have to test each component either way, I’m not sure if it’s a counterfeit, especially when prices are 100x more expensive from distributors.
Is there a general rule as to how much clearance you should add to through-hole components’ holes to allow them to fit easily? For example, if I have a component with 1mm pin diameter, what should the diameter of the holes for it’s pads be?
When assembling printed circuit boards, engineers have two main techniques to choose from: through hole and surface mount technology (SMT). In the early days, we dealt
PCB and PCBA are the two most common terms in the electronics industry. Although the difference between them is only one letter, they represent different
More and more companies choose to outsource PCB assembly services, and in the process of outsourcing, people are often most concerned about how to reduce
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