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  • ARJL commented on ARJL's instructable Kids "Spaceship Control Panel" Prop3 months ago
    Kids "Spaceship Control Panel" Prop

    There is a picture (labelled "spaceship control panel schematic") in Step 4 that shows where the resistors go, but there are only 4 of them. The schematic shows 8 SWITCHES- 4 switches for the columns and 4 for the rows. The column switches provide a path to Gnd (the - (negative) side of the battery) from the LEDs. The row switches provide a path to the +5V supply from the LEDs. The 5V supply comes from a LM7805 device (available from mouser.com, radioshack (if you still have one), or maybe Frys.com, or other electronic suppliers like adafruit or sparkfun). The LM7805 converts the 9V battery voltage to a lower 5V supply that the LEDs can handle (otherwise, you'll destroy the LEDs). Note also that the LEDs are the special 2-color (usually red/blue or red/green) blinking variety.

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  • ARJL commented on ARJL's instructable Kids "Spaceship Control Panel" Prop4 months ago
    Kids "Spaceship Control Panel" Prop

    Sai, Sorry, I never wrote up an instructable for the other ones I built & gave away. I'd be happy to guide you to some other projects that would show what the possibilities are. My favorite is the "Mission Control Desk" on YouTube at: https://www.youtube.com/watch?v=j6zseFi070E (not sure Instructables will let me put links here, but you can google for this). Another approach would be to build a modest control panel to use with the "Kerbal Space Program" Game. With this, people build a control panel with a microcontroller that can interface to the PC and mimic certain button presses. Just google "KSP control panels" and look at the various images. Hope this helps.

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  • ARJL followed drickman1564 months ago
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  • ARJL commented on ARJL's instructable Kids "Spaceship Control Panel" Prop7 months ago
    Kids "Spaceship Control Panel" Prop

    This was set by trial and error- I knew approximately the value I was going for, then adjusted the value until I got the brightness I wanted. In this case, 5mA worked nicely (5v-3v) / 390=5mA. No reason to drain the battery any faster, since it's sortof a pain to replace (have to unscrew the back- this was an intentional design decision to keep little fingers away from the sometimes-sharp wiring on the back).

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  • ARJL commented on ARJL's instructable Kids "Spaceship Control Panel" Prop10 months ago
    Kids "Spaceship Control Panel" Prop

    Thanks for sharing! This looks awesome! I like additional switches, and the baseboard looks very polished.Robert

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  • ARJL commented on ARJL's instructable Kids "Spaceship control panel" Prop1 year ago
    Kids "Spaceship control panel" Prop

    It's not a PDF- it's a microsoft Powerpoint file. They offer a separate Powerpoint viewer here: https://www.microsoft.com/en-us/download/details.aspx?id=13

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  • ARJL commented on Fishbum Frank's instructable Teardrop Trailer Aluminum1 year ago
    Teardrop Trailer Aluminum

    Thanks. That gives me a pretty good picture of the interior environment. Happy camping!

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  • ARJL commented on Fishbum Frank's instructable Teardrop Trailer Aluminum1 year ago
    Teardrop Trailer Aluminum

    Beautiful work and workmanship. Very clean design. Looks like you put a lot of thought into where things go and make use of all the available space. I was wondering how cold it can get outside and still be comfortable since the insulation is 1/2". Can you do winter camping with this? Did you use insulation under the flooring as well?

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  • ARJL commented on ARJL's instructable Kids "Spaceship control panel" Prop1 year ago
    Kids "Spaceship control panel" Prop

    Thanks! Good luck. Would love to see pictures of anything you build.

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