What is the difference between sensor gl5516 and gl5506?
I am thinking which type of light dependent resistor photoresistor LDR is better. gl5516 or 5506 sensor? Can anyone brief the main difference?
December 12, 2023
Oliver Smith
Technical Writer
Oliver is an experienced electronics engineer with over 7 years of experience developing products in IoT, consumer electronics, and medical devices. He is highly skilled in analog circuit design, embedded systems, PCB layout, firmware coding, and prototyping electronic products. Oliver’s expertise encompasses the full product development cycle, from concept to mass production. He holds a Master’s degree in Electrical Engineering and leverages his deep technical knowledge to deliver innovative electronic solutions.
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What is the difference between thin film and thick film precision surface mount resistors?
I’m using some 0.1% precision 10k and 150k resistors. They are thin film 0603 surface mount. For a lot more, there are also thick film types. Fundamentally and practically, what is the difference between these two?
December 8, 2023
What are the black spots in lead-free solder joints on PCB?
I am prototyping a PCB, using Chip Quik’s “SMDSWLF.031, a Sn96.5/ Ag3.0/ Cu0.5 solder with 2.2% no-clean flux. I find that the black spots appears frequently in larger pads on my board. I wonder if it is because I left the soldering iron more time heating the solder and that burnt the flux. What is that black residue? Is that a sign of a bad joint or maybe bad soldering technique?
December 1, 2023
What are primary and secondary sides of PCB?
I am designing a 2 layer PCB with components on both side of it. SMT components are one one side of PCB, but TH (through hole) components are on both sides. I need to understanding something mentioned by the supplier called primary and secondary sides.
November 23, 2023
How do I find a PCB schematics for a device?
We are new brand of medical device. We are doing a device development recently. How can we find PCB schematics for reference?
November 22, 2023
How can I determine BGA land pad diameter for given ball diameter?
I’m working on a project which requires the use of a CSP package. The product’s datasheet provides ball pitch and ball diameter but nothing about the preferred land pad diameter.
How can the pad diameter be worked out from these figures assuming an NSMD land?
November 21, 2023
What’s the meaning of “CR” marked on the PCB?
Receive the PCB prototype from supplier. And see a CR mark on the board. What does it mean? Is it related to quality control?
November 15, 2023
What should be the size of an NFC antenna given an operating distance?
I am dealing with a project about a PCB with NFC antenna. We are designing PCB now. Do anyone know about the size of an NFC antenna if we want it operate in 10 centimeters?
November 14, 2023
Do ICs have a shelf life?
What I would like to know is if ICs also have a limited shelf life and if so, do some types suffer more than others?
November 2, 2023
