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  • JakeG52 commented on tlp801's instructable Trash-Vac!!1 month ago
    Trash-Vac!!

    Unfortunately not with these fans. Computer fans are brushless, and have a small built in controller, they don't reverse directions like a normal DC motor would. If you really really wanted reverse, you could either add a second fan facing the opposite way, or replace the fan motor with a DC motor (make your own fan), or take the circuit board out and add a bi-directional brushless motor controller like from a hobby RC car. The cheapest way would be add a second fan, it would also be the easiest.According to 2 recent comments, just drilling holes at the bottom really helps and fixes the vacuum you create when pulling out a trash bag, so even this should help with removal even with the fan off.

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  • JakeG52 commented on Matt Carl's instructable Electric Longboard | 20mph | 10 miles2 months ago
    Electric Longboard | 20mph | 10 miles

    You can just use an arduino. The motor controllers work with regular PWM, or "servo-code" outputs. Get a no-name arduino for $4 each on ebay, if you want wireless, get a $1 radio trans/receiver (433mhz or 355 mhz as examples, get the legal frequency for you country). It should be about the easiest thing to code, just a few lines since you only have one output. That would be under $10, and you could program it to have a steady acceleration throttle curve, or anything fancy you want.You could also use brushed motors, they have dirt cheap (like $5) motor controllers, and just use like a drill motor (but you would have to re-cad it, and I know not everybody has used CAD software before, but it is a cheap alternative).I'm planning on doing something similar, but going for all wheel...see more »You can just use an arduino. The motor controllers work with regular PWM, or "servo-code" outputs. Get a no-name arduino for $4 each on ebay, if you want wireless, get a $1 radio trans/receiver (433mhz or 355 mhz as examples, get the legal frequency for you country). It should be about the easiest thing to code, just a few lines since you only have one output. That would be under $10, and you could program it to have a steady acceleration throttle curve, or anything fancy you want.You could also use brushed motors, they have dirt cheap (like $5) motor controllers, and just use like a drill motor (but you would have to re-cad it, and I know not everybody has used CAD software before, but it is a cheap alternative).I'm planning on doing something similar, but going for all wheel drive, twin motors with differentials in the trucks. It will be a while till I get time, cost should be around $45-50 +battery and board choice.

    This is a pretty awesome design, you did a good job. I particularly like the mount where it clamps onto the trucks. I know I would take cruising in style over walking any day! That's no joke about the "too fast for comfort", your hitting around 20 mph with that board. Excellent job!

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  • JakeG52 commented on APlane's instructable Design & Build Your Own Electric RC Airplane6 months ago
    Design & Build Your Own Electric RC Airplane

    The Aspect Ratio was "confusing" to you because you have it backwards. AR = span/chord. Your plane has an aspect ratio of 75/13 = 5.77You even said gliders have a high aspect ratio, hence the wings look long and skinny from above. Saying high apsect ratio = low number should be a red flag, a low number is low, not high. (hopefully this helps someone, when in doubt, Google it)

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