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  1. C

    Burglar alarm.

    Okay, I was gonna keep quiet on this one because I looked at it as a hobbyist doing a project on a breadboard or something. Now that some of these guys are treating it as if you're actually trying to build a working burglar alarm system, I'm going to put in my 2 cents worth. I speak from over...
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    Burglar alarm.

    Deleted. Sorry. Can't help here.
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    German translation

    I find that Google Translate helps if you already know the language but are rusty and can't remember words you used to know. I used to be fluent in Spanish and "conversant" in German, but not using either for decades took its toll of attrition from what used to be my vocabulary in each. I use...
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    Get your tin foil hats out....

    All those conspiracy theories are sheer bunk! The only real conspiracy is one that is overlooked: The perpetration of the bogus conspiracies by the tinfoil manufacturers, so they could market more of their product. And who, by the way, are so devious that they have substituted aluminum in place...
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    Bare copper wire Question

    I've seen a lot of (indoor) exposed bare copper wire in my time, like thick ground wires. Unless it's sitting in a stagnant wet environment (like inside a leaky wall or door jamb), it can take years to develop that green copper(II) carbonate hydroxide patina that seals the copper against...
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    Ademco 10se Panel

    Okay, you have two options: (1) Find a User Code by brute force: Take up a new hobby, of trying x-hundred 4-digit codes a day, starting from 0000 and working toward 9999. You can try some obvious codes first, like 1234 (you would not believe how many homes I've found that still use that...
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    Ademco 10se Panel

    I agree it should have been, but @ferrariboi's story is a pretty common one on DIY alarm forums. New buyers have dozens or hundreds of considerations to check out and it's not uncommon to skip over checking out the alarm system. Most people don't give alarm systems much thought until they...
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    German translation

    What LvW said. Plus, for future reference, Pete: It's rare that you can get a meaningful translation for just one word. Sometimes you can, but more often one word taken out of its context (the sentence in which it is used) is ambiguous at best. As Alec-t illustrated so well for us. The best...
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    Super capacitor phone battery

    Guys, this is new information to me. I was going on my experience working with a large number quality PCBs that lasted for decades. The vast majority of the PCBs I replaced were for upgrades and new features, not because the boards malfunctioned. So my experience has been that electronic...
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    Super capacitor phone battery

    I have to pick a nit here: The up-front cost of capacitors vs. batteries of equal energy storage is greater, but the cycle life of capacitors is orders of magnitude greater than any battery. I've seen typical promises of a million charge cycles, but we all know that plenty of capacitors have...
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    Mystery Electronic Device

    Huh! You're right, I missed that. I interpreted the bottle as being dark green even though the OP said it was filled with dark green liquid--apparently filled completely to the exclusion of an air bubble. My bad. :oops: Still wondering if OP can shine a light through and see anything inside.
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    Can minor fumes from old tubular lead acid batteries cause permanent damage to lungs

    I've never smelled hydrogen sulfide from overcharged, leaking, or otherwise faulty lead-acid batteries. Granted that the batteries I've worked with are smaller than the OP's, and are sealed (usually), but the chemistry is the same. The batteries I've worked with were situated inside closed...
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    Mystery Electronic Device

    Just curious, how can you tell the fluid is dark green, when it's in a dark green bottle, where water would look dark green? How opaque is that glass? Can you shine a small flashlight through it and see what the wires are connected to? Any chance it's connected to a light bulb inside, to turn a...
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    Short distange battery operated(door bell type) alarm

    I'd like to help, but I have no idea what it is you're trying to detect. A "door alarm" usually means a sensor that detects a door opening/closing. Do you want a sensor that doesn't trip until a door or hatch or gate opens 1,2,3,4 feet? That's not very useful for a front door alarm, but might...
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    remote controls

    I worked on garage doors in the early 70's, before I got into the alarm industry, which used much the same remote signal technology for its wireless sensors as garage door remotes. As well as I can recall off the top of my head, that generation of RF receiver activated a relay if it received any...
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    Wireless proximity detector that goes off when blocked

    I'd be inclined to install a photoelectric sensor (photo eye) near the bottom of the hopper or jar or whatever, as long as what you're detecting the absence of, is opaque. You may need to install an LED aimed at the sensor from the opposite side of the vessel, if you want it to work in the...
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    Honeywell vista security alarm control panel

    What model is your Vista panel? The Control Panel, not the keypad. "Vista" is the name for a series of control panels, kind of like a "Maytag" fridge. All Vista panels have much in common but there are differences. One difference is that some don't have fuses and some do, and those that do...
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    Coffee machine power issue

    *shakes head* All that circuitry to make coffee. You guys do love to have things complicated. :rolleyes: *rinses out soup can* *punches holes in bottom of can* *Inserts cotton sock, looping elastic over rim* *measures one spoon of coffee grounds into sock* *sets can on coffee cup* *pours in...
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    Reed switch door alarm help

    So the owner/user has 30 seconds to leave the room after arming/turning on the alarm. Out of curiosity, how is the owner/user going to come back into the room without triggering the alarm?
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    Car battery jumpstart gadgets

    Well, to begin with....the jumpstart device needs to be portable. Even at home, a fair number of people park their cars far enough from their house/apt that the device would need a L-o-o-o-ng extension cord, which would sometimes need to be strung across the street. Not all of us have...
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