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  1. Externet

    Any 433/315MHz receiver hacker around ?

    Thanks, Edd. Yes. Products capable of much wider performance than the data sheet or applications mention. Because nobody thinks/is after the 'unusual uses' should not forbid from new applications, ISM or not. If my operation license allows me to do it in another band, why do I have to hit a...
  2. Externet

    Any 433/315MHz receiver hacker around ?

    Hi. Those cheap general purpose modules meant to receive 433MHz signals... how to make them work at ~140 MHz, or 150 MHz, or 100 to 200 MHz ? I assume other inductors/capacitors should work shifting tuning, if the chip is capable... Know any links to someone doing it ? How would you do it ...
  3. Externet

    building a noise activated sensor to record the noise and duration the noise is made

    No need for a noise detector, vox, tape recorder... just a loud stereo with the speakers on the window aiming to the intended direction and playing endlessly ----> While you go to the beach for the weekend.
  4. Externet

    Next Smoke Detector Millionaire or Not?

    Like 25 years ago, a builder asked me to implement a smoke detecting system in like a dozen+ rooms in a Ripoffornia building -ooops- California-, were the then new 'code' was just being mandated and wired sensors were sustantially more expensive. Wired 9V ones them all to a trickle-charged...
  5. Externet

    Use for old scanner?

    It would be very nice to tap the reception chip and feed the signal to a digital decoder like P25? : ----> https://wiki.radioreference.com/index.php/APCO_Project_25 There has to be a chip that does it, perhaps from ----> https://www.cmlmicro.com/wp-content/uploads/2017/06/CMX981-Innovation.pdf...
  6. Externet

    Sciaky model C.R.O.I. what is it?

    C.R.O.I ----guessing ?----> Cathode ray oscilloscope interface ?
  7. Externet

    Sky Boxes.

    Those 'boxes' contain very interesting modern components; tuning modules, power supply, sometimes hard drive, and in a cabinet useful for many projects.
  8. Externet

    Digital to Analogue

    Find a ATSC digital to analog TV signal converter; typically around $30, or at a pawn/thrifty shop. Receives modern digital television signals from any antenna and converts such to analog signal to be fed to the older TV antenna terminal. They were very common by the year of transition to ATSC...
  9. Externet

    Have a little fun...

    ---->
  10. Externet

    Identifying LCD Display - VDO Logic Combi

    I have many types of displays available if you are in USA. Is there a picture of your needs or some image of the exact VDO item on the web ?
  11. Externet

    Do I understand what this does ?

    Thanks, gentlemen. I was unsure of understanding chinoisish... If I could manage to delay the output pin by some RC components and feed it back to the trigger pin; these could be used as high current - low voltage blinkers, could they ? Time to scratch my head...
  12. Externet

    Do I understand what this does ?

    Hi. Hitting the 'trigger' momentary switch, the load is energized. Hitting it again, load de-energizes. From 2 to 4 Amperes load, from 3 to 6 V supply. ---->...
  13. Externet

    How to add an AUX port to a portable player

    Hello. What is the intended meaning of the triangles symbols inside IC7 at first image on post #2 , for L1/R1, L/R2, L3/R3, L4/R4 ?
  14. Externet

    A cb radio not working after being sent in for modification

    What could be the purpose of increasing the power output of a CB radio ?
  15. Externet

    Light bulbs as dummy load for Stereo ?

    An automotive 12V 55W head lamp can fake a ~5 ohm load.
  16. Externet

    Wanted: Wanted: Ramsey AR2 receiver, kit or assembled.

    Thank you, Ken. The AR2 display is highly convenient to have and be able to tune accurately instead of a guessy dial. I will look at the AR1 you mention to see if could be used by adding a frequency display without much complications. Another reason for the AR2 unit is that would be good to...
  17. Externet

    What is the series-parallel configuration ?

    Hello all. Three backlight strips from inside an Emerson-Funai TV model LF501EM5F (50") Wired by three pairs of connections to its supply board. How to find out the supply; or the series parallel configuration of the emitters ?) Strips are 23 emitters each, but cannot see its...
  18. Externet

    Name of "through PCB IC socket rows"

    There is also a cousin of the sockets, called ZFI -zero force insertion- that may be of your interest some day :
  19. Externet

    8-pole connectors

    :) ----> https://www.amazon.com/BIN-BON-connector-waterproof-female/dp/B07RWHHJ26/ref=sr_1_3?keywords=db9+waterproof+connectors&qid=1566509597&s=gateway&sr=8-3
  20. Externet

    8-pole connectors

    Water and weather are not the same. Will it be immersed ? For what wire gauge ? One picked at random ----> https://www.mouser.com/datasheet/2/276/0194180001_CRIMP_HOUSINGS-227736.pdf for $6 at Mouser Good chance of picking them for $0 at a car wrecker, with a length of wire to it. Or work a...
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