https://wiki.kptree.net/ 2026-09-27T00:29:36+00:00 https://wiki.kptree.net/ https://wiki.kptree.net/_media/wiki:dokuwiki.svg text/html 2025-12-28T13:38:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/project:ethernet?rev=1766929100&do=diff ethernet rj45 utp stp Ethernet Twisted Pair Cables Cable Types Cable Type Shielding Description Use Case UTP None text/html 2024-08-24T08:27:38+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/project:sprinklers?rev=1724488058&do=diff sprinkler inductor controller solenoid valve solenoid_valve Sprinkler Solenoid 24VAC Woes See my Home Sprinkler notes I have had many problems with my sprinkler system; decrepit failing 30 year old underground wiring, failing solenoid valves and their solenoids. Some of the old solenoid valves were replaced as they had mechanically failed. The multiple issues made it vary difficult to diagnose what was happening at any time. text/html 2025-12-30T03:30:53+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/project:leds?rev=1767065453&do=diff diode led Electronics Info/Data LEDS and Diode notes Some rough notes concerning LEDs and diodes. References * Basic Light Emitting Diode guide * Guide to LED Circuit Designs and LED Basics & Operation Resistor ColourRing 1Ring 2Ring3Ring 4 Figure 1Figure 2MultiplierToleranceBlack001Brown11101%Red221002%Orange331,000Yellow4410,000Green text/html 2024-02-25T09:07:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/project:oscilloscope?rev=1708852023&do=diff oscilloscope Oscilloscope I recently purchase a small single channel digital oscilloscope, Zeeweii DSO154Pro. Typical for Chinese supply the instruction provided are terse. These are some additional notes. DSO154PRO Parameters (from suppliers manual): The accuracy above 15MHz may be such that use in this range is limited. text/html 2025-12-30T03:53:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/project:grid_power?rev=1767066819&do=diff grid_power grid power electric Grid Power It's not what you think... it's worse. Sky high power prices are by design. Topher Project Ep 194 Bid Stack Electric Power System Description Type Response Inertia Capital Cost Power marginal cost Power Stability