Tagged firmware
2 pieces
- · 7 min read
A Time Fuse and an Iteration Fuse Are Not the Same Thing
A hung tool call freezes the iteration counter forever, so a max-iteration cap can never fire on a hang. Only a clock catches it, which is exactly why every embedded watchdog counts time rather than iterations and runs on its own oscillator. Too slow is a hang and too fast is a spin: two opposite edges, two different instruments, and most teams have shipped two copies of the same half.
- · 7 min read
Your Bill of Materials Passes and Your Board Is Still Wrong: Topology vs Parts
Two current-limit resistors in series for redundancy is good design. The same two resistors, both the correct value, placed in parallel instead, quarters your limiting and roughly doubles the current. Every part inspection passes, because both resistors are the right value and the bill of materials is correct. The failure is not in the parts, it is in the topology, and your incoming checks do not look at topology.