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  1. Externet

    fta Sat TV decoder: Need some ID

    Is the unit in standby mode waiting for a remote control signal to turn on the rest of the power supply ? Replacing capacitors by guessing will fix nothing. FTA with a card slot ? What for ?
  2. Externet

    Solar Street Light

    The $1 decent garden lights dozen I got at a store named "Dollar General" have behaved well, 2+ years so far. Got lucky. When they ran out of stock I got the glass Walmart ones, had to seal crevices with hot glue to prevent bugs/moisture, failed shortly. When the stock was replenished, bought...
  3. Externet

    Solar Street Light

    Start with the power in watts of the LED lamp needed to illuminate as much as you want. Continue checking the size (and price) of a solar panel of double the watts and its mounting harware. And a battery size to store enough energy to last overnight, and weight, and price, and where to locate...
  4. Externet

    LED Celling stay glow.Can I stop that?

    Seen that behavior several times, the leds faintly lit with power switch off, discernible only in a dark room. My bedside lamp does it, and is only wired to the outlet with a two-prong plug, no ground. Has to be some leaky component conducting μA when switched off, and have not paid enough...
  5. Externet

    Anyone know where I can buy one of thes buttons?

    A tact or pushbutton switch in a jewel box of choice yields your handheld switch. Or get a discarded ----> https://upload.wikimedia.org/wikipedia/commons/7/71/IPod_shuffle_4G_front_right.jpg and disembowel to use/wire any/several of its switches. Plenty at pawn shops; bigger, smaller, colorful...
  6. Externet

    Quality testing of an electronic item

    Quality must be defined first, which is not any simple matter to start. Then to make things harder there is two kinds of quality: From the point of view of a consumer and from the point of view of a manufacturer. You can use the very best materials to build an item, a superb design and...
  7. Externet

    Lamp: Will it burn my house down and kill me?

    With a safer 12V DC supply, a bunch of these 254nm would be needed for exposing all ducts : ----> http://www.ebay.com/itm/UV-C-254nm-Germicidal-100mm-by-12mm-Dual-Light-Lamp-Bulb-12V-DC-Kit-/351591912722?hash=item51dc82d512:g:5akAAOxydINSaUSW The chinese will claim 400nm as also germicidal...
  8. Externet

    Lamp: Will it burn my house down and kill me?

    Wanted to apply the same treatment for ducts in my house... A friend was nearly killed by the contamination in his Miami house. The pictured/linked product should be effective; but in my opinion, only to the area it illuminates. The rest of ducts length should be able to harbor plenty of...
  9. Externet

    help designing triggering device for underwater camera

    Well done and extra thanks !
  10. Externet

    Joining NiCd batteries - conducting glue

    Forget about glue; but if you succeed insisting on it, let us know which glue worked. Wrong tabs orientation can be corrected folding the needed tab as 'origami' towards the desired direction. Or, simply, solder wires between tabs. Perhaps AWG 14-16
  11. Externet

    Adding Aux input to older car stereo

    You must identify which IC manages the audio selection path. If you do not have a schematic, search the data sheets of each IC of about 18 pins that you see on the printed board and come back with the number, to explain where to inject an auxiliar signal. Another way is to identify the IC that...
  12. Externet

    Li-Ion battery question

    I believe your question is aimed to be responded with reverse polarity charging, which destroys the cell chemistry. (+)------------cell1-----------cell2-----------cell3----------cell4----------(-) If all cells in the battery above are 4V, the total supplied to a load is 16V. The electrons...
  13. Externet

    help designing triggering device for underwater camera

    Hi Chris. Last time I saw those scuba connectors was early seventies ! If you do know the brand or vendor, please share ! Thanks.
  14. Externet

    Power supply V/A question

    For that minimal voltage difference, give it a try. It should work. For the current capability; means that the battery pack will take slightly longer time to recharge, if the battery pack is in such discharged state that will demand that many Amperes. Keep in mind a battery charger for a...
  15. Externet

    Reed switch

    Not only colorful, but Edd invests time and effort to provide good pleasant responses to members. (-12) should be interpreted as the negative of 12V. A pull-off resistor at the base should be convenient to add. 73 !
  16. Externet

    Connecting cable to a pcb pin with electrical tape

    "Electrical" tape ? Do you mean insulating tape ? If cannot solder, what is wrong with alligator clips ?
  17. Externet

    Any ideas - Rotary momentary switch?

    If you put a lobe on the original shaft, and 2 of these... ----> http://www.cadsample.com/wp-content/uploads/2015/09/Two-Position-Microswitch-3D-Solidworks-Drawings.jpg Action set for partial lobe rise will produce return-to-center when released. There is also this kind of switches that an...
  18. Externet

    Any ideas - Rotary momentary switch?

    ----> https://www.amazon.com/Rotary-Switch-Single-Momentary-Off-Momentary/dp/B007F1ROKG My vehicle has those kind of rotary switches for exterior mirror control. That would be near $0 at a car boneyard. Or, remove the detent ball of a 3 position slide switch and operate it with a rod from the...
  19. Externet

    12v to 5v

    ----> https://duckduckgo.com/?q=car+adapter+5v&t=canonical&ia=products
  20. Externet

    Small Video Screen Suggestion

    "Small" means nothing. Specify dimensions. ----> https://duckduckgo.com/?q=composite+monitor&t=canonical&ia=products
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