Lundin‭

posted 1y ago by Lundin‭  ·  edited 2mo ago by Lorenzo Donati‭

This question here about the OSI model was closed as off-topic. How should we treat questions about data communication? What is definitely on-topic here: Embedded systems programming, including...

3 answers  ·  posted 2y ago by Lundin‭  ·  last activity 2y ago by Olin Lathrop‭

One rule of thumb is that a CAN network should never have any error frames when it is up and running. It is expected to have some when all nodes are "waking up", or if you hot plug something to the...

posted 3y ago by Lundin‭  ·  edited 3y ago by Lundin‭

When writing firmware in C for a microcontroller, how can I directly access a memory location such as a hardware peripheral register, given its absolute address? Is there a way to do this safely an...

1 answer  ·  posted 3y ago by Lundin‭  ·  edited 3y ago by Lundin‭

Using pointer types In C, an object pointer such as uint8_t* ptr is the equivalent concept to use for hardware addresses. A compiler makes this pointer type large enough to contain all addresses in...

posted 3y ago by Lundin‭

RF novice here. If using a superheterodyne receiver for the purpose of FM/FSK modulated signals, I'm wondering if the location of an optional automatic gain control (AGC) circuit is always placed o...

0 answers  ·  posted 1y ago by Lundin‭

As we know there exists numerous different kinds of PCB CAD software. The big ones seem to be Eagle, KiCAD, Altium, OrCAD, Solidworks, DesignSpark and probably a few more. When it comes to mechani...

1 answer  ·  posted 1y ago by Lundin‭  ·  last activity 1y ago by Olin Lathrop‭

Based on this nerdy but seemingly trustworthy site: https://www.prc68.com/I/TelephonePoles.shtml Then I would guess these are cable TV repeaters/signal amplifiers. Classic cable TV uses copper co...

posted 1y ago by Lundin‭

I can't get my CAN bus application (ISO 11898-2, classic "high speed CAN") working and I'm receiving various CAN error frames. These error frames manifest themselves as sequences of 6 bits with my ...

1 answer  ·  posted 3y ago by Lundin‭  ·  last activity 3y ago by Lundin‭

Which are the parameters I should looking for when picking a flyback diode to be placed across a generic coil, such as a relay? That is: a coil with plain on/off functionality, for example a 24VDC ...

2 answers  ·  posted 2y ago by Lundin‭  ·  edited 2mo ago by Lorenzo Donati‭

Regarding scope of embedded systems/firmware When we released Software Development, I made a push to make all forms of embedded systems programming off-topic and re-direct such to this site. The ...

posted 2y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Assume I'm a complete beginner at RF. Is there a way to measure return loss of an antenna, in such a manner that I can reliably reproduce the measurement later on? What I'm talking about is produ...

2 answers  ·  posted 2y ago by Lundin‭  ·  last activity 1y ago by TonyStewart‭

Disclaimer: I'm not an expert of EX classification myself, but I once was project/product manager for such a project (a zone 0/20 intrinsic control system product). While I can't answer the questio...

posted 2y ago by Lundin‭

After reading various low quality questions Someplace Else today, it (once again) occurred to me that a whole lot of people, mostly hobbyists and engineering students, have no clue how to do the mo...

4 answers  ·  posted 1y ago by Lundin‭  ·  last activity 2mo ago by Lorenzo Donati‭

Coming from a background of safety-related applications and industrial control systems, with some maritime applications experience, I could offer a few insights. These kind of game controls are li...

posted 3mo ago by Lundin‭