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  1. FuZZ1L0G1C

    powering 36 DSLR cameras from a single powersupply

    As for measuring the (idle) load of a DSLR, I came up with this idea to test my camera (a Pentax K2000 SR) load: (Presuming your 400d's also use AA cells). Cut a piece of paper or thin card / plastic to the size diameter of one cell - cell 'bridgepiece' which should be on lid. Cut 2 lengths of...
  2. FuZZ1L0G1C

    Electrical stove on DC?

    What about this? (depending on your budget of course).. Solar panel charges lead acid battery(s). Battery supplies power to power inverter of 110VAC with sufficient current rating (1KW or more).
  3. FuZZ1L0G1C

    MOV blown on NiMH 4xAA cell charger - cause?

    Hi. My NiMH 4xAA cell charger is manufactured by "Duracell", the rechargeable batteries I bought are "Energizer recharge" 2300mAh each, ACCU NH15 1.2V NiMH - HR6. I have started using rechargeable cells with this recently bought charger as my power-hungry DSLR Pentax eats alkalines at an...
  4. FuZZ1L0G1C

    Opto or IR sensor, what type?

    That I did do so. That's the PDF I downloaded to my 'pee-see'. :D Thanks for the link. ..Interesting to see the last two characters are date of production (I didn't know). Year, month: so I guess 9F is 2009 and February. Looking at the sensor's specs and the transistor, which is 2N3904 NPN...
  5. FuZZ1L0G1C

    Opto or IR sensor, what type?

    Thank you. I think that's it, as when I re-examined the sensor casing (after cleaning off some epoxy), I found it has a "T" in front, a gap which is probably the worn off P, then S604-9F. ie: T S604 - 9F Basically, I'm trying to get the specs of the circuit & components to see what maximum...
  6. FuZZ1L0G1C

    Opto or IR sensor, what type?

    Hi all. I have dug out a small project built several decades ago. This is basically an opto or IR detector circuit, which originally illuminated a 3mm red LED when input was sensed. I added a jack socket across the LED for connecting to a scope / amp / sound-card input etc for monitoring. Very...
  7. FuZZ1L0G1C

    M87 SMBH, Geodesic & Astrometric VLBI, cross-correlation interest

    :oops::oops:Thank you for that catch.o_O Typed from (somewhat fuzzy) memory.;)
  8. FuZZ1L0G1C

    M87 SMBH, Geodesic & Astrometric VLBI, cross-correlation interest

    Our local newspapers recently published a released image of cluster Galaxy Messier 87's super-massive black hole, obtained through Very-Long Base-Line Interferometry. For those who don't know, this is a correlation of multiple far-flung radio-telescopes located on planet Earth. This creates a...
  9. FuZZ1L0G1C

    Comedy Thread

  10. FuZZ1L0G1C

    questions clean crt

    Electro-Cleaner aka Contact Cleaner or similar fast-drying solvents work well. Not sure if this is chemically 'Isopropyl Alcohol'. Pre-brush / vacuum to remove excess dust. Spray on liberally. Wipe off with a soft cloth. Safe to use, in well ventilated area.
  11. FuZZ1L0G1C

    Wind Detecting Circuit

    Vertical axis turbine, as @duke37 said in #17, then instead of a motor, (which creates drag), drill 8 or more small holes vertically through both faces of the turbine, then use an LED / photo-transistor to detect the modulated beam, frequency dependant on wind velocity. However, this may be...
  12. FuZZ1L0G1C

    Problem and question TV CRT

    You may have a dry joint, possibly around the (HT) fly-back circuitry of TV. A trace (copper track) or board may have a crack. Or it could be arcing from dust particles. The interface connection (e.g. composite video) may be suspect. I guess that you have opened the chassis cover, from your...
  13. FuZZ1L0G1C

    For Sale: Sangean ATS-909 SSB CW Portable Radio

    Nice. :) If closer, we'd talk business. Too far... :(
  14. FuZZ1L0G1C

    40 Floppy disks for...

    I threw out most of my old floppies long ago, but kept a few of the dark brown cellophane disks as photographic filters.
  15. FuZZ1L0G1C

    My Vacation

    Great pics. Looking at how the 'balancing rock' #5 is still perched on the apex of its weather-worn base, I gather Utah does not experience many earthquakes / tremors. "Delicate Arch" (AR) #6 is similar to one of the 'Rock Scapes' photos of a CDR-based Corel photo database which I've had for...
  16. FuZZ1L0G1C

    Something small and loud needed.

    Depending on how deep your pipe is buried, you may need to use a low frequency transmitter, such as those used in cave exploration communications. Somewhere in my pile of old hobbyist magazines, there is such a circuit....
  17. FuZZ1L0G1C

    How this forum came to be

    Now that you mention it, I dug out an old handbook "The Internet and WWW", which lists their selection of newsgroups to visit for specific subjects / topics of interest - "Electronics" not in index. However, I remember using Gopher etc to search, link to and download or print (ASCII-based)...
  18. FuZZ1L0G1C

    What do you reckon the most produced component is?

    Given that most electronics today are digital, IC gate packages would probably be up there. Thinking 78*** and 4*** families for a start.
  19. FuZZ1L0G1C

    Bloody cats!

    We originally had two B&W bi-color American Shorthairs aka "Tuxedo Cats". Older once passed a few years ago due to age. His younger, boisterous half- "brother", Blackbeard or just "BB", now runs the house (ragged). 3AM: Deep sleep.. dreaming of .. thunder??.. Vrooom!! Cat tears across bed and...
  20. FuZZ1L0G1C

    How an electromagnet can calculate kilogram

    Mass is density per displaced volume, or "lb/ft.sq \ kg/m.sq", and has inertia. Weight is the gravitational attractive force between two masses. A mass of "x" would weigh eg 67 kg on terra firma, but only ±23 kg on the lunar surface, and weigh much more on Neptune. Gravitational force on Earth...
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