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I created a foot print for a Vcc / ground solder jumper pad.
The upper left picture shows how I have done a selectable pull-up / pull-down resistor arrangement using 3 pads. The square pad with the circle is the resistor connection to the port pin. The other 2 pads are Vcc and ground, with...
No.... I think that would be a nightmare!
A ring on the bottom layer to ground, as shown in post #6, and a similar ring on the top layer to Vcc. Short the top for pull-up. Short the bottom for pull-down. Short both to let the magic smoke out 😉
Ahhh. That's an interesting way to allow easy ground connections. It does require careful soldering and attention to detail.
On micro boards I've designed, I have provision for pull-up/pull-down resistors for some port pins using 3 pads for a vertical resistor. One leg to the port pin, and...
Without understanding all the details of your code, the issue is between the character "9", which is ASCII code 57, and the value 9 – string vs numeric value. Both ends must agree on what's being sent and received.
I made a smaller start on my solder tip holder – a 3D printed holder to fit around my soldering iron holder. It's actually more useful, keeping the tips I use readily accessible.
This is for a Schneider 80 Watt temperature-controlled Soldering Station from Harbor Freight. The tip holder...
Molded power cables are a commodity. The Happy Captain Molded Cable Company turns them out by the millions. They don't make "center positive" and "center negative" cables – they make 5.1mm × 2.1mm coaxial cables, with the center contact assumed to be positive (as God intended) and marked...
MrDEB can't figure out shift registers where you shift out 1 BIT per LED using existing software modules to do so.
Do you really expect him to be able to figure out how to "roll his own" solution to send 3 BYTES per LED where timing is critical?
Why complicate a thread that is already 20...
Perhaps this article will explain what we have been unable to. It uses Charleplexing – but that's not important – how the time is displayed is what you need to understand.
https://www.nutsvolts.com/magazine/article/build-an-analog-style-led-clock-part-1
MrDEB, you are remarkably resistant to seeing the point. Nearly 400 posts ago, you asked about making an analog LED clock. But is doesn't seem like you've thought it through. What do you need to make an analog clock? The ability to individually control LEDs in some pattern. The ability to...
A thought about the reed switches in a pipe.....
Is there some distance between the switches, such that only one is on at a time? That would leave unknown states. For example, the high level sensor turns off, so both high and low sensors are off. Is the pump getting the level down, and it...
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