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  • darryl's Avatar
    Today, 12:30 AM
    darryl replied to a thread Free triacs in General
    I would use them to run some halogen tubes in a special lighting unit that I'm thinking of building.
    3 replies | 131 view(s)
  • darryl's Avatar
    Yesterday, 05:10 AM
    darryl replied to a thread Fractional Hp motor ratings in General
    Electric motors have fascinated me since I was just a kid. Back in the day the usual ac motor that might be found in a table saw or drill press was...
    49 replies | 1462 view(s)
  • darryl's Avatar
    Yesterday, 02:05 AM
    darryl replied to a thread coating on brass in General
    It started from the edges of the strips. It appears to me that the surface of the coating tried to stay intact while the edges curled up, drawing the...
    11 replies | 593 view(s)
  • darryl's Avatar
    03-28-2017, 08:34 PM
    darryl replied to a thread coating on brass in General
    There was some slight discoloration, but very little. As I suggested I didn't leave it in the bath too long, probably 15 minutes or so. The...
    11 replies | 593 view(s)
  • darryl's Avatar
    03-28-2017, 02:48 AM
    darryl replied to a thread coating on brass in General
    Well I got my answer- muriatic acid is eating it right up! At first it didn't seem to be doing anything, so I left it for a while, then gave it a...
    11 replies | 593 view(s)
  • darryl's Avatar
    03-28-2017, 01:47 AM
    darryl replied to a thread coating on brass in General
    Hmm- I just remembered the Cole Parmer chemical compatibility chart, so I looked up polyurethane and sulfuric acid. It said 'severe effect', so -...
    11 replies | 593 view(s)
  • darryl's Avatar
    03-28-2017, 01:12 AM
    darryl replied to a thread coating on brass in General
    Yes, I think it is a urethane, not an epoxy- the smell is similar but not quite the same.
    11 replies | 593 view(s)
  • darryl's Avatar
    03-28-2017, 01:00 AM
    darryl started a thread coating on brass in General
    I have some brass that I've cut up for use in electrical contacts. It started life as a decorative piece for a kitchen or vanity, so it came with a...
    11 replies | 593 view(s)
  • darryl's Avatar
    03-25-2017, 12:36 AM
    Constantly driving the carriage with the lead screw would drive me nuts. As far as the hand wheel that drives through the rack, I removed my hand...
    30 replies | 1184 view(s)
  • darryl's Avatar
    03-24-2017, 04:12 AM
    darryl replied to a thread How to test Treadmill Motor in General
    Some of those motors are able to turn with just a few volts. That could be as low as 3 volts, or perhaps up to about 7 or 8 volts would be needed to...
    39 replies | 1734 view(s)
  • darryl's Avatar
    03-23-2017, 01:54 AM
    darryl replied to a thread How to test Treadmill Motor in General
    Pretty easy to test. The motor will have the main wires, plus possibly some sensor wires or maybe a thermal cutout. With no wires connected to...
    39 replies | 1734 view(s)
  • darryl's Avatar
    03-19-2017, 07:49 PM
    Bore it out and use JB weld to secure a nyloc nut inside it. The other thing I like to suggest is to cut a sacrificial nut in half and clamp it back...
    25 replies | 954 view(s)
  • darryl's Avatar
    03-19-2017, 02:31 AM
    I do not have a mercury mirror, nor do I know of any near here. I was referring to projects I've read about and seen pictures of. I don't recall...
    12 replies | 608 view(s)
  • darryl's Avatar
    03-19-2017, 12:24 AM
    Spinning liquid in a horizontal plane does produce a parabolic surface. My first attempt made a very shallow curvature, so it's hard to tell, but...
    12 replies | 608 view(s)
  • darryl's Avatar
    03-18-2017, 03:22 PM
    Was thinking again about doing some spin casting to produce a parabolic surface. Normally I'd be using a resin of some kind, probably epoxy, and...
    12 replies | 608 view(s)
  • darryl's Avatar
    03-17-2017, 10:58 PM
    Some days I try to exit the shop quickly so I don't get caught up in the 'gotta clean up this mess' syndrome. :) At work I try to clean up often...
    30 replies | 1774 view(s)
  • darryl's Avatar
    03-17-2017, 04:32 AM
    darryl replied to a thread using welder to power motor in General
    I think you'll find that the welder can't be left powered for extended periods of time without getting hot, even with low or no load. It's not even...
    13 replies | 843 view(s)
  • darryl's Avatar
    03-16-2017, 08:55 PM
    You can measure using the white as common and get -24 on the black and -12 on the red, but you can't use the black as common and see +12 on the red...
    30 replies | 1300 view(s)
  • darryl's Avatar
    03-15-2017, 08:52 PM
    Potentially the black would be ground. The two whites together might be nothing more than two 24 v wires leading away to the original application....
    30 replies | 1300 view(s)
  • darryl's Avatar
    03-13-2017, 08:27 PM
    Thought about the original question a bit more- now I realize that if auxiliary power of some sort is driving one half shaft, and the engine is not...
    25 replies | 1186 view(s)
  • darryl's Avatar
    03-13-2017, 03:22 AM
    I don't have a particular goal in mind, but perhaps a useful thing would be able to bring the vehicle from stopped up to say 50 or 60 k on the...
    25 replies | 1186 view(s)
  • darryl's Avatar
    03-13-2017, 12:26 AM
    A few days ago I started wondering about how to add auxiliary power to a front wheel drive vehicle, say electric assist. You could add something to...
    25 replies | 1186 view(s)
  • darryl's Avatar
    03-10-2017, 08:57 PM
    darryl replied to a thread method for making a dome in General
    Thanks everyone. Some good ideas here. I like the layout for the geodesic dome, thanks Evan. The rounded hexagon looks to be what I'll need for this...
    30 replies | 1993 view(s)
  • darryl's Avatar
    03-09-2017, 03:07 AM
    I'm building a model of a planet- basically a half sphere. There are many ways of going about this- blow up a balloon then cover it with paper mache...
    30 replies | 1993 view(s)
  • darryl's Avatar
    03-09-2017, 01:43 AM
    I can hardly wait to see how Buckleys Mixture is made-
    9 replies | 1046 view(s)
  • darryl's Avatar
    03-05-2017, 02:18 AM
    Maybe get a nice piece of stainless sheet, cut it to fit, and silicone it on.
    24 replies | 1237 view(s)
  • darryl's Avatar
    03-04-2017, 08:46 PM
    I gather that there isn't a control pot in there to set the sensitivity-
    28 replies | 1975 view(s)
  • darryl's Avatar
    03-04-2017, 08:41 PM
    darryl replied to a thread Metal in a microwave? in General
    You might find that just winding a helical coil of wire won't do much- but if you short the ends together it could vaporize. Part of the equation is...
    16 replies | 1236 view(s)
  • darryl's Avatar
    03-02-2017, 08:47 PM
    Back to the MPPT vs charge controller- I'm thinking there would be little benefit to using an MPPT controller if you're using a panel that's rated at...
    41 replies | 2378 view(s)
  • darryl's Avatar
    03-02-2017, 02:19 AM
    One question I have is whether there is an MPPT controller that can take much higher voltage and translate it into higher charging current. In this...
    41 replies | 2378 view(s)
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About darryl

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About darryl
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Chilliwack, B.C.

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I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-

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