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  1. Externet

    audio to servo control

    Try ----> ----> https://duckduckgo.com/?q=audio+servo+lips+movement+toy&t=canonical&ia=web
  2. Externet

    Under water wireless signal?

    Is the sending emitter of any kind (ultrasonic, light, radio) above water or submerged as the receiver ? Submerged... Use radio at 100KHz or less. Forget about MHz+. Audio... use DTMF. Very long range capable. Ultrasonic... should work fine with proper transducers. ---->...
  3. Externet

    10v -14v input to 12v regulator circuit high current

    To charge your batteries, 14V is what you need, not 12V. You did not expect a higher voltage at night, right ?
  4. Externet

    Need on/off switch

    Look here ----> https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=switch+for+rockwell+model+12+saw&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=rockwell+model+12+saw+switch&LH_TitleDesc=0 And here ----> https://www.ebay.com/bhp/rockwell-switch
  5. Externet

    Resistor for motor to slow speed..

    Or connect in series a 12V light bulb, choose its watts to suit the desired speed. Connecting diodes in series will drop each 0.7V to the supplied voltage to slow down to desired speed. But mind that if you are sensing it as 'bit strong' when dry, you need to check it pumping fluid to the...
  6. Externet

    Kenwood oscilloscopes?

    Very tempting ! Approved for medical use too. With its service manual on hand, can be a wonderful scope.
  7. Externet

    Unknown electronic symbol

    Can be the lower right connected as counterparalleled, A1 to K1. When 'circled' can mean LEDs :
  8. Externet

    Learning Project Help - Converting a full sized solar panel

    It would be simple to use the panel output fed to a 5V DC duck converter and connect many USB jacks as needed. No need to cut or alter the panel risking it. Just a separate box housing the wiring, DC converter and jacks will yield only the panel wiring as input, and a bunch of jacks flush on...
  9. Externet

    How do I amplify a low Amp signal (12 v, 100 mA) to 12 v 3.0 Amps?

    A 12VDC powered automotive subwoofer power amplifier has a built-in voltage booster to be capable of delivering the output sought. For extra, most are 2 channel bridgeable.
  10. Externet

    Kenwood oscilloscopes?

    I have used multiple Kenwood amateur radio equipment 40 years with no complaints. Their oscilloscopes have been around for at least 30 years and they should be even better built than their other equipment lines. But I have repaired at least a dozen of 'brand name' Tektronix scopes whose power...
  11. Externet

    Car GPS (in case car is stolen)

    Maaany years ago someone developed the application "WIMP" - 'Where is my phone?' - It may be still available. You hide a phone in the vehicle, permanently powered, and can report location on request. Edited... found it in my bookmarks. Now called 'Trackme' ---->...
  12. Externet

    Organic LEDs...

    OLEDs in 'discrete' trough hole 3mm... do they exist ?
  13. Externet

    Home automatic watering system

    Welcome. Is it for a home or is it for irrigation ? You mention both. Is there a raised cistern ? Is there a reservoir ? Or the pump intake is a mains pipe ? You can use two float switches in series. One in the reservoir and one in the raised cistern. 120V-------------------./...
  14. Externet

    Stuck detecting 'engine running' from alternator 'W' signal

    If you do not like implementing an additional oil pressure sensor with a simple T fitting, attaching a microphone to the block is an alternative. They are also cheap, abundant, called automotive knock sensors. A circuit to amplify and handle time-to-response will give the desired delay to...
  15. Externet

    Stuck detecting 'engine running' from alternator 'W' signal

    Or, erase the blackboard about using the alternator and implement an oil pressure switch that will ground when there is no oil pressure. That warns the engine is not running.
  16. Externet

    Humidifier power button bypass

    Try shorting or disconnecting the humidity sensor that tells it the humidity preset has been reached.
  17. Externet

    What are those components?

    Manufacturers print anything on their parts so they can identify their production batches in-house. Next day, same part production may have a completely different markings. The correct part number appears only at the reel or bulk packaging labels. (As told by a manufacturer)
  18. Externet

    Please excuse total noob query regards seeking storm bad signal effect on sat TV

    Wouldn't such block DC ? The attenuating path should be for RF without affecting DC.
  19. Externet

    What connector type is this on aerobic septic system control board?

    Try : ----> https://www.waytekwire.com/item/38700/2-Pin-Receptacle-Mini-Fit-JR/?gclid=EAIaIQobChMIqL7e7Iro3AIVhbXACh3_LwbzEAQYAyABEgLYd_D_BwE (Hit the 360 icon on picture, female terminals shown at its right) ---->...
  20. Externet

    Please excuse total noob query regards seeking storm bad signal effect on sat TV

    Not intended as a joke. If a plastic pulley can be installed once on the roof antenna with no danger of falling, the foil can be positioned pulling the string. A wrong attenuator may also attenuate the voltage supply for the LNBA, and errors/shorts can kill the power supply in the receiver
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