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    Variable AC Dummy Load

    Well, with a dummy load you're facing a challenge turning the energy into anything besides heat. I don't know if it would be worth your while, but you could build your own resistors from a heating element.  This would allow you to make whatever load you want.  It would also reduce the startup...
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    hacking a solid state relay

    That's a good idea too, Ante. I've already started thinking on the disturbances part.  I'll use a triac driver with zero-crossing circuitry (I have about thirty on hand) to limit the interference.  I'll also use at least one full cycle at a time to balance the load, but I don't think I'll go so...
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    hacking a solid state relay

    I don't know what more there is to tell about the oven.  The thermostat is off by enough that a cooking thermometer has to hang from one of the racks to give a better indication than the setting on the knob. By cabinet mounted, I mean that it is not in the same enclosure as the range top- that...
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    hacking a solid state relay

    I might.  I have a cabinet mounted oven with a failing thermostat.  The appliance shop tells me that the oven is so far outdated that they can't locate a replacement part for it.  Since it is in otherwise good condition I was thinking about using it as an excuse to build a PID controller. After...
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    hacking a solid state relay

    Thanks for the fast reply, Ante. I haven't looked further than a couple online catalogs for price, but they seem to start at $30 each for the molded block type.  I'll definitely have to look on ebay, but the selection there is not necessarily stable.  Anyway, the application that prompted me to...
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    hacking a solid state relay

    There are some projects that may be easier if I had a few SSRs on hand, but between the price of them and the parts I have laying about I'm considering making my own.  I have SCRs good to 50A and 600V with isolated tabs (in rediculous quantity), a few triac optoisolators, and probably all of the...
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    Help with making aux. 5V battery pack

    A low dropout voltage regulator should do the trick.  They often have a very low quiescent curent. Depending on some details pertaining to your email address, you may be able to get free samples from Microchip. http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=64 Look...
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    Voltage

    What is the difference between the left hind wing of a duck? The higher it flies the much!
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    Magnetic Induction charged Torch

    My dad has one that looks very similar to that one.  He was very proud of having a torch that needs no batteries.  I looked inside and guess what- I found two lithium coin cells (non-rechargeable type) hidden inside.
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    7 segment displays

    At that size, you're probably better off making your own 7-seg from arrays of individual LEDs.  That will give you ultimate control over color, size, and intensity.
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    Nokia 3310 Display

    Thanks Mixos.  Berty's page helped a lot.  I had a glitch for a while (probably messing up the !reset pulse) but now its running.  Right now it's displaying the output from a PRBS routine.  I saw right away that wasn't going quite right, now it's fixed too.  It ended up being a great test...
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    opto coupler triac

    By this do you mean that the relay you are controlling is running on DC?  If so then that's likely your problem.  Triacs (and SCRs too) are regenerative switches- when you turn them on they latch.  To turn them off you need to interrupt the current.  They are very useful for AC becauce for every...
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    How did I blow out a leg of a Bridge Rectifier(BR82D)

    Your scope leads may be causing the problem.  If the either output form the bridge rectifier is electrically grounded then the scope ground lead may be providing a current path that you hadn't planned on.
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    i don't get it?

    Um, mind if I ask what this is for that a transformer won't fit?  And assuming it's not a terribly hazardous application, can you be more specific about the power requirements of the fan?
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    Free sample chips!

    It might have something to do with your profile.  TI/BurrBrowm has always sent me everything I've asked for (and some of it was pretty expensive), but then I've never requested that many part numbers in one fell swoop.
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    Does anybody know IC for Amper meter?

    Allegro has hall effect current sensors for several ranges.
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    Pin Identification on TLE2426CLP

    Have you looked at http://focus.ti.com/lit/ds/symlink/tle2426.pdf
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    ElCheapo PSU

    The rectifier is only conducting when the input voltage is higher than the filter capacitor voltage.  This is probably a very low duty cycle so the instantaneous current is much higher than the average current.
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    Work

    The crew I work with has the highest safety rating, but possibly the highest turnover rate as well.  Five quit this week, one wasn't even on for two full days.  I guess that's one drawback to also having the highest productivity of all shifts.  The wage pays the bills.  The medical coverage is...
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    LED sequencer-need help

    I'm afraid that for an intelligent sequencer you'll have to use a microcontroller.  Since you only want one LED lit at a time and the kill switches only need to be read prior to their renk in the sequence, you can probably do it with 9 I/O pins.  Is this for a game-show device?
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