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@promitheas:matrix.org

  • 13 Posts
  • 55 Comments
Joined 2 years ago
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Cake day: June 12th, 2023

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  • These 2 boards are part of my circuit, which I want to move from my breadboard to a PCB, so I need a way to attach these boards to the PCB. Due to the fact that I want the ability to re-use these boards in other projects, and also not have them stick up from the PCB vertically, I decided to go with right-angled headers so that I have both of these features (easy plugging in/unplugging of the boards from the final PCB, and a more compact final design).

    However since they will need to hang over some degree you need to look at the 2d drawing and make sure the right angle header pins are long enough to mate to the matching component on the board.

    By this do you mean I need to make sure the pins on the boards will fit in the hole of the headers? I was under the impression that pin length is quite standard, much like pin separation. I believe mine are 2.54 mm because they fit nicely in my arduino headers, as well as the breadboard. I’d assume the length is also standardised. Please correct me if Im wrong.

    If you are sending the board out to be made at a shop you will need to define these features and tolerances in the manufacturing layer that will export as part of the gerber file and possibly provide a 2d drawing.

    By this I assume you mean that I need to make sure the boards will clear any other components on the PCB? I’ve been getting through this playlist: https://www.youtube.com/watch?v=ZHH4G_EWhm0&list=PL3bNyZYHcRSUhUXUt51W6nKvxx2ORvUQB&index=4&t=2s

    as I go through each step of the process. When he gets to the point about designing the PCB I’ll see if he mentions how to make sure I have enough clearance for all my components, otherwise I guess I’ll look for other videos explaining how to do this.



















  • Thanks it actually was quite helpful to understand why I need to use such a capacitor for my chips! (Until towards the end he started getting really deep into it and my eyes glazed over)

    Am I correct in assuming that my project and the chips I use do not really require me to put 3 or 4 different value capacitors in parallel instead of just one? Also, he mentions that its a good idea to use this technique on all chips, so would there be a downside to me placing a (or more) capacitor on the Vcc pin of all 3 of my chips (RTC, LCD display, Bluetooth) even though their datasheets might not specifically mention requiring them? Basically, if I have the capacitors, is there a reason to not put a decoupling capacitor on the Vcc pin of any chip in your circuit?





  • Yes, I’ll probably just be doing this on breadboards, but there is a chance I might eventually move it to a PCB (assuming I learn that part of KiCAD soon enough and have enough time to order PCBs before I need to submit). In either case, the power source of the entire system will probably be some holder/rack (not sure what they are actually called) for several AA or AAA batteries. Basically it will need to be something that a theoretical consumer would be able to replace easily - the batteries that is.

    Do the problems outlined in your and other’s comments about these types of capacitors in this application also present from regular batteries, or are they usually not high voltage enough to cause problems?