EMC emission and immunity testing is fun. And anxious watching live results during testing. Will it pass or fail?
Make sure long cables are adequately shielded.
Cables running near metal frames can turn them into antennas.
Neopixels too small and dim?
Neopanels are big and bright!
24 LEDs controlled by single WS2811. Logically appears like a single Neopixel.
https://t.co/FlkFaeWTmV
DMX lighting is actually pretty easy.
Quick python script and FT232 USB-RS485 adapter is all it took.
Longest part was finding the channel definitions of a light that had no documentation.
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If you ever need RS232 on a system but only have CAN, the Waveshare CAN-RS232 converter worked great for me.
Plugged it in, configured it, up in ~5 min, no fuss.
https://t.co/paejK3zVHU
Home repair weekend. Kenwood receiver not powering on. Standby voltage should be around 16V no load, but drops to 3.2 when connected to processor board. Injecting external 12VDC can bring it back to life. Is the standby trafo really that burnt?
Capacitive dropper power supply.
Faulty 1uF cap that degraded to read a value of 0.1uF will cause increased reactance, Xc=1/(2*pi*f*C). This in turn will cause more voltage drop across it which lowers the supply voltage available to the controller IC.
Nice $0.78 fix.