Tech Docs
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Why Ethernet links repeatedly go up and down, and how to isolate bad cables, optics, switch ports, negotiation problems, drivers, and other causes of link flapping.
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Learn how std::optional represents values that may be absent, including nullopt, safe access, value_or, monadic operations, and C++26 range support.
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Learn std::move_if_noexcept: when C++ chooses a move or a copy, how noexcept affects container reallocation, and how to design move operations for exception safety.
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Learn PROFINET basics for field technicians: controllers and devices, device names, DCP, GSDML files, real-time I/O, switches, commissioning, and troubleshooting.
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The control board is the small computer that coordinates an ASIC miner. It does not perform most of the SHA-256 hashing itself. Instead, it runs firmware, connects the miner to the network, communicates with the pool and tells the hashboards what work to process. That makes it the bridge between the miner’s hardware and software.…
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Why a Gigabit Ethernet link can suddenly negotiate at 100 Mbps—and how to isolate cable, termination, switch, NIC, and auto-negotiation problems.
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Engineer motor-control circuits using contactors, auxiliary contacts, seal-in logic, electrical and mechanical interlocks, reversing starters, and control-power design.
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Learn the Windows sc qsidtype command: query a service SID type, interpret NONE, UNRESTRICTED, and RESTRICTED, distinguish SID type from the SID value, and troubleshoot service isolation safely.
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Learn the Linux chattr command: set and remove immutable, append-only, and other filesystem attributes; verify changes with lsattr; and troubleshoot attribute-related failures safely.
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Learn how to use Linux ethtool to inspect Ethernet speed, duplex, auto-negotiation, driver information, NIC statistics, and hardware-level link status.
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Armv8-M Architecture Fundamentals explains what is actually happening inside an Arm Cortex-M processor when software tells a microcontroller to perform a task. At the simplest level, Armv8-M is a set of architectural rules defining the processor’s registers, instruction set, memory system, operating modes, exceptions, interrupts and other behaviors that software can depend on. Processors such…
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An ASIC miner’s power supply unit (PSU) converts incoming electrical power into the regulated outputs its hashboards and controller need. When that conversion fails, the miner may shut down, reboot repeatedly or stop hashing. Heat is a common stressor. Blocked airflow, failed fans and high inlet temperatures can accelerate wear in capacitors, semiconductors and other…
