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Not so easy with large packages, and shipping clerks always make the mistake of us the USPS International Priority Mail, which is a minimum $25 (US) charge even though you tell them over and over again just to use first class mail for the bag of screws. Also, the Priority Mail actually takes...

I've found a freight forwarder in Washington State so that American companies don't have to deal with figuring this out. I pay the extra fees and clear customs myself and it's much cheaper and faster. Vern

Oxide films (corrosion) on electrical contacts act as diodes and will rectify RF signals. This rectification demodulates the RF and is audible as noise. In the olden days, we used a crystal of Galena (lead ore) and a piece of wire called a cat's whisker to make a crystal radio set that...

My taxi camera now shows a blank blue screen. Before I begin tearing everything apart, i'd like some advice.. is the camera fried or is it the video adapter? My guess is the camera because of heat. Vern

14 Volt 'production' version, fully functional.  This version adds an FTDI serial-to-USB connector, connectors for WiFi or Bluetooth or display modules, 1 amp 5V power supply and a 3 Volt power supply to make it 100% Uno signal compatible. Used a 4-layer board to simplify the addition of more...

Isn't that a copilot is for?

Not a permanent fix. I've replaced all of the fast-ons firewall forward with barrel connectors. Not perfect, but much better. The problem is that we are measuring microvolts here and any corrosion leads to an oxide film that produces a semiconductor junction. This messes with the...

Here's a breakdown of the options: 28 Volt, field configuration (includes case, primary input protection, etc.) $68 14 Volt, field configuration (includes case, primary input protection, etc.) $57 28 Volt, lab configuration (no case, only secondary input protection) $52 14 Volt, lab...

Arduino compatible controller for SkyView-Group Bu I've completed the Beta trials for my Arduino Compatible aviation controller (Falcon-AVR). One application involved 1600 lines of C code to implement an auto-trim and flaps controller, which is now flying, and the second was for an instrument...

Here's a link to a datasheet http://www.mccsemi.com/up_pdf/PN2907A(TO-92).pdf That should give you the info you need for wiring, but you'll be dealing with soldering and mounting.  There should be some guy nearby nicknamed 'Sparky' who can help you. What I would do if it were me would be to...

The SV can drive up to six RockRack switches directly. For more than that, the buffer circuit I drew should work, for up to 20 or so switches. Vern

Hi Steve, I sent you an email. Also, Dynon's advice on this is correct, just hook it up with paralleled serial outputs. Cheers, Vern

In defense of Dynon, they cannot design everyone's electrical system for them.  That's why avionics shops and people like me exist. However, your application is common enough to be addressed.  The Dynon dimmer outputs may not be able to drive the load you want.  You will want a buffer between...

I've already gotton feedback on the design from another pilot who wants an Arduino controller for his yacht (too many toys!) that does all the same stuff, but at a slower speed. He needs one more analog input, so I am putting a jumper option on the PCB to allow for this, to get a total of six...

Sorry Folks, I found a bug in the Arduino PWM circuit that forced a documentation change on my part. Best to use the link here to get the most recent version: http://vx-aviation.com/documents/ Thanks, Vern

Thanks. The documentation is actually the most important and time consuming part of the project. A lesson I have tried to teach to many, but with limited success! Vern

Arduino-compatible aviation controller. Here’s a sneak preview of my new Arduino-compatible motion controller.  It was developed as an auto-trim controller for the Dynon SkyView system, before Dynon released their own.  This version has been flying for more than three years, with a earlier...

Aha! I used a GP input for my timing advance meter, but I've always been suspicious of the measurement because it was sensitive to ground potential differences. Using the TC input to make a differential measurement should eliminate this error. I guess the result will be displayed in degrees...

It's very important to ensure that your plugs are all in good condition and have identical gaps. Any problems with the plugs, wires or mags will cause erratic readings. The P-TACH device helps to stabilize tach signals, but won't fix misfire problems in the ignition system. I tried misgapping...

The problem you faced and the solution is very common in audio systems. Ever wonder why stereo systems have grounding lugs in the back? That was for connecting all of the equipment chassis together to reduce noise and interference. There are a lot of lessons to be learned in this thread, but...