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    Modifying 4.5 V (alkaline) lamp to run brighter with 3.6 V (NiMH)

    I did a simple modification to a hand lamp decades ago, when incandescent bulbs were all we had. The lamp was flat and originally used a 4.5V bulb with 3 cells of a size intermediate between C and AA.. I wanted a brighter light, so I switched up to a 4.5V bulb and replaced the battery with 4 AA...
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    How do I program the call out number on my alarm system?

    Thanks for the heads-up, davenn: I check into the forum a couple of times on most days, but I'm going to have to change my routine with this new forum format. I missed this thread yesterday. The Installation manuals for professional-grade alarm control panels like the NX-6V2 aren't made for...
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    New layout sucks

    Thanks, Steve and Ian: The new layout was gonna drive me nuts, too.
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    Control Electric fan through Wireless Temperature Sensor

    Before discussing the electronics---do you understand that turning on an electric fan does NOT lower the temperature of a room? If a room is at 40 degrees (Celsius) and you turn on a fan, the room remains at 40 degrees. It may feel cooler because the moving air helps evaporation of...
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    vista 20p with 6160 rf keypad getting check 100 message.

    You're obviously aware that the CHECK 100 RF message means that there's a Trouble condition with the RF Receiver, which is integrated into the PCB of the 6160 Keypad. It sounds like the Vista-20P Panel is intermittently not hearing from the RF Receiver. The first thing to check is the wiring...
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    i need help with my campus assignments

    Duh! Much better idea than mine.
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    i need help with my campus assignments

    That was exactly my thought, Harald, but then I noticed yurlanDV is in Indonesia, a nation of tropical islands along the equator. I'd guess there is a lot of wind and breezes already blowing very humid air in the wet/monsoon season that makes an electric dryer desirable in the first place...
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    Does mAh rating of a battery affect the device at the same rated voltage?

    Seriously!? Okay, my bad, I guess. I have no experience with cordless phones of any brand or model. I'm just surprised that any electronic device in this day and age has that primitive a charging circuit. Apparently it works well enough, though. I have an old cordless phone stored away...
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    Does mAh rating of a battery affect the device at the same rated voltage?

    Bob is absolutely correct, and IMHO, it's not a nitpick. One thing no one asked yet is, what kind of batteries (NiCd? NiMH?) did your phone have originally, and did you replace them with the same kind of batteries? If you replaced NiCd with NiMH, then they won't charge properly, regardless of...
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    Comedy Thread

    That actually makes sense: Rabbits instinctively go to ground...
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    Burglar alarm circuits failing to drive opto isolated EasyDaq DIO board

    How old is your security system? Brand and model? Here in North America, alarm control panels aren't considered obsolete as often as Smartphones and laptops etc. I infer that you're measuring across the zone loop (circuit) terminals with the loop wires attached and the sensors in "happy"...
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    Repairing a water level detector

    Here's an idea: Replace the corroded sensor electrodes with stainless steel bolts as dave9 suggested, then replace the bolts every 3 months, or 6 months, or year, as needed. I think 2 stainless steel bolts will be cheaper and probably almost as easy to change as a 9-volt battery. (I say...
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    Comedy Thread

    Interesting observation. You've read "Snow Crash?" ;)
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    Comedy Thread

    https://animals.mom.me/there-snakes-new-zealand-6450.html Excerpt: New Zealand is one of several large islands around the globe where there have never been native snake populations. The others are Antarctica, Iceland, Ireland and Newfoundland. Snakes are more common than lizards around the...
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    Cheapest bank checks?

    I'd heard (and forgotten) what kellys eye said, many years ago. I searched it on the 'Net and he's right: Any check is legal as long as it contains the relevant information. Not having magnetic ink simply means that it will probably be spit out by a scanner somewhere and processed by a person...
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    Cheapest bank checks?

    I think Bluejets was being funny, but he actually has a point: You might try taking one of your purchased checks and covering all the references to the check number. I've done something similar by taping a small rectangle of paper over an item with invisible tape that doesn't show up on a copy...
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    How to turn Smoke alarm into Ultrasonic Dog Repeller

    I assume you mean an Ultrasonic Dog Repellent? 10-25kHz isn't really ultrasonic--most adult humans hear up to 20 KHz, and most kids well into their teens hear up to 25 kHz ( and many of them beyond). I seriously doubt that that an old smoke alarm sounder can be modulated to sound in the...
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    LED ON / OFF by Magnet

    A reed switch driving a toggling relay?
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    Playing with fire

    Copper dendrites? Voltage up to 5.5V? What's the composition of this cell?
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    Prisoner in Home - alarm system Safewatch Pro 2000 @ Stay

    Gorgon, I appreciate your desire to help, but Dholly's alarm control panel is a Honeywell Vista-20SE (which ADT re-labeled "Safewatch Pro 2000"). I don't know much about alarm systems in Europe, but I know that they're done differently than in North America: The equipment, wiring, and...
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