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  1. S

    identical failures in two appliances mystery

    Refrigerator, dryer, and dishwasher all on the same line, ... My experience at my place, is that when you run all those at the same time, you actually get the power wiring to heat up, .... which can trip your thermal protection. My advice, unless you want to rewire with larger gauge wire, is...
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    Electrostatic force

    I started two suggestions to abrohit post, then deleted them, because of conjecture about what the system is actually composed of. Can you be a little more specific about physical construction of your system? I'm assuming aluminum was used because it's non-magnetic. Most electrostatic mats...
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    DC VOLTAGE CONVERTION

    What's your ground? Can you reverse the polarity of your project? Using the -48V as your ground, and going positive from the -48V ground?
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    Blue Paste?

    I don't know how good an electrical conductor RTV would be. But it would just hold the two parts in place, and wouldn't help to transfer the heat from the resistor to the thermal fuse very well either. I don't know how sensitive the whole shebang needs to be. I would think just making sure...
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    Blue Paste?

    Nuts,... I probably gave you a bum scoop on your blue paste. I was talking to a guy at work, who believes your blue paste was probably to facilitate THERMAL TRANSFER of heat from the resistor to the thermal fuse. (To better transfer the heat from the resistor to the thermal fuse). If...
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    Tektronix Probe Readout Pin? What is it for

    Yeah, and you got the probe from Tektronix that was made for your scope. The generic replacement tried to make itself useful with a variety of different scopes. Should I make a joke about Chinese electrons, compared to American ones? The Tektronix ground is sometimes necessary for attempting to...
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    Problem with my multiple relay circuit

    *steve*'s right. A varistor is essentially (electrically) back to back diodes. You should find plenty of information on the web concerning diodes across the coil of a relay, to prevent your problem. If you're unfamiliar with a varistor, the diode solution will work. I regularly put varistors...
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    Blue Paste?

    My guess would be, the blue paste was just something used by the manufacturer to hold the assembly of resistor and thermal fuse together, when they assembled the circuit. (Easier for assembler to install a ready-made single piece, than sit there and solder the two pieces together during the...
  9. S

    Panasonic CT-36SL13G Blown Fuse Issue

    We could speculate all day on why a fuse would blow. Fuses are rated for the full voltage they CAN handle at that amperage. You can use a fuse rated for 250v in a 125v circuit with no problems. You would not be wanting to use a fuse rated at 125v in a 250V circuit. Some cheap fuses will be...
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    Problem with my multiple relay circuit

    Probably collapsing electromagnetic field from the relay shutting off, and however your circuit is wired, the other relays get a bump from that pulse. A varistor should absorb that spike.
  11. S

    Variable speed pump for shower

    Looks like your in the UK. I would not use a Triac in your application. SCR's are commonly used for motor control applications. Thyristors running at 50hz would not cause you to be concerned about their on and off times, ... but Triacs are not commonly used for motor control.
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    Viz Senior Voltohmyst

    If you use those batteries, you better be REAL careful with whatever pot you use, cause it's going to be dissipating a hell of a lot of current, and will get really hot. If I were you, I'd be looking at (buying would be easier) making a power supply to get your 50vdc. If you DO the batteries...
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    Nicad battery pack

    I'm with davenn. You should be able to get replacement batteries with three times the capacity of your old 500MaH now. Watch out if your batteries are NiCad (Nickel Cadmium), or NiMH (Nickel Metal Hydride), ... it'll make a difference to your recharger. The recharging circuits are different...
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    Dual 7 Segment Connector

    There are SOCKETS on the market (easily found), to plug the 7-Segment Display into. But there's no getting around the connections for the resistors (although they do make SIP (Single-In-Line) resistor packages), that'll save you having to solder-in a whole bunch of individual resistors...
  15. S

    Phillips screw security bit?

    Harbor Freight will sell you a good set of security bits for $5. If you don't use them now, you'll have them on-hand for the next broken device you want to check.
  16. S

    Timer

    Use a TDR (Time Delay Relay), They are also made in an octal base package. You select a fixed time interval from manufacturer, or a variable adjustment in say 0 to 5 minutes. Check Newark Electronics, or Allied Electronics for starters.
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    Analog switch ad-750919

    Get the data sheet at: www.analog.com It'd help if you told us what you're using it for. It works, that's why they made it. If it doesn't work for you, you're wiring your circuit incorrectly.
  18. S

    Variable speed pump for shower

    I'm figuring your pump IS your water flow for the shower, otherwise KMoffett's idea is best. Motor control is usually accomplished with SCRs (Silicon controlled Rectifer). But it controls speed by driving the motor during part of the sine-wave of an AC voltage. So changing the length of the...
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    boiler relay pcb fault help!

    Are you sure the auger is turning freely? Make sure it's not seizing or sticking, and can turn freely. I know you took it out and ran it without any problems, when it's reinstalled, is the auger rubbing against something it shouldn't? The clicking sounds like the relay is trying to engage...
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    brushless dc printer motor

    Yes, you would drop some of the voltage presently running the motor, across the resistor, slowing the motor speed. BE CAREFUL of the value and wattage of the resistor. I don't know what voltage your motor is running at, or the current to drive it. Too much current through the resistor, and if...
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