Search results

  1. FuZZ1L0G1C

    Looking for an underwater ranging device

    Another idea: As sensing the swimmer's position via shadow / ultrasonic / resistance may be hit and miss, the robotic camera should ideally be controlled manually, either directly (get out that scuba gear), or remotely via long interface cable & small poolside monitor. I'm thinking along the...
  2. FuZZ1L0G1C

    Kenwood KR-865G Burnt Resistor

    Resistor body coloring: AFAIK beige is carbon film and pale blue is metal film. Older carbon resistors were mostly dark brown bodies. Not sure if wire-wound (usually for high power resistors) has a specific body color code. The ones 10 W>25 W I've used in the past have been rectangular white...
  3. FuZZ1L0G1C

    Looking for an underwater ranging device

    If you can get away with a long, thin, clear-insulated flexible wire, almost invisible under water, maybe you could use one probe on the swimmer, the other on the camera housing. As tap water has a DC resistance of about 400K-600KΩ/m, 'poolarised' water may be slighty lower due to salts and...
  4. FuZZ1L0G1C

    What should I get for beginning electronics?

    Theory first, including basic electrical concepts, component identification and function. Once you have the basic knowledge, start out with simple, basic circuits to lay the groundwork. Books and knowledgeable mentors/forums can guide you to higher levels of electronic nirvana.
  5. FuZZ1L0G1C

    Connecting and insulating wires in high temp environments

    Electrical Heat-Resistant tape, sold at many hardware stores. Being adhesive-backed, and the woven glass fiber incredibly strong, you can either tightly wrap the ends of a glass fiber sleeve which sits over the ferrule, or tape-wrap the entire connection. The tape is white, with a woven cloth...
  6. FuZZ1L0G1C

    Very basic resistor replacement question

    Yul - The power dissipation rating is the maximum power in watts that the resistor can handle. It won't in any way affect the power dissipated by the circuit, which will be the same as before.
  7. FuZZ1L0G1C

    Connecting and insulating wires in high temp environments

    If you have an electrical component store near you, the type that stock heating elements, thermostats, etc they should sell fiberglass sleeving per meter, used for insulating wires. As this sleeve is soft and flexible, simply slide it over the un-crimped conductor, cutting it slightly longer...
  8. FuZZ1L0G1C

    Can this PCB section be salvaged? Beginner struggling...thanks

    Generally, an iron of 30-60W should be suitable for most medium work, 25W for light work, and 100W for heavy duty. I have various sizes to suit whatever project I am busy with. The 100 Watt monster was used to strip old components from an obsolete motherboard. As long as you solder / de-solder...
  9. FuZZ1L0G1C

    Entering square bracket in text

    Browsing through EP's list of BB codes, the PLAIN tag may also work. As in this online test.. Then enter inline[i]
  10. FuZZ1L0G1C

    Kenwood KR-865G Burnt Resistor

    First two bands Red and Violet make it 27..... Third (multiplier) band unreadable. Fourth (Gold) band makes it 5% tolerance. The blue body means it's a metal film resistor, not wire-wound. The film is visible where multiplier band used to be. Comparing your needle-nose against resistor body...
  11. FuZZ1L0G1C

    Slayer Exciter with arcs?

    The music is frequency modulated, carrier wave modulated, or Pulse-width modulated. One method used is to simply "chop" the HF signal in sync with the negative peaks of the audio, on the primary. This is CW modulation. AM wouldn't really work, as when the primary falls below a certain threshold...
  12. FuZZ1L0G1C

    Switch Identification

    Ring it out & press a few times to confirm.
  13. FuZZ1L0G1C

    Comedy Thread

    Why F.E. don't do astronomy.......
  14. FuZZ1L0G1C

    Can’t find trace to DC jack

    Thanks, yes, only after shutting PC down early this morning (our time), then rebooting today and logging back on, did your 8:16 AM post appear - last night it didn't. Guess the new posts only appear on my browser when I exit then re-logon to the site, or something. Before logging off this...
  15. FuZZ1L0G1C

    Can’t find trace to DC jack

    Nope. Multi-layered PCB's are resin-epoxied under heat and pressure. Test resistance / capacitance across visible ground and VCC. Measure between common ground plane (ADP_GND1 /ADP_GND2 / PANEL_GND) and ADP_VCC1. No reading means a missing track is buried. Some reading means maybe, possibly...
  16. FuZZ1L0G1C

    Crt tv image over sized

    It could be a PAL>NTSC incompatibility, or the resolutions differ between units. Not sure if your specific model KV27S42 has H/V geometry and size adjustment pots (knobs) at the rear, as some models do, otherwise go into on-screen service menu and adjust H SIZE and V SIZE to lower values. If you...
  17. FuZZ1L0G1C

    Multi Meter usage

    Seems strange that the shower-radio uses a 3.5 mm stereo socket for DC and not a DC socket. AC / DC wall-wart voltage being fed to earphone output, maybe? If this is a modified setup where mini-plug is used as a DC source, put meter range on 50 volts DC (just past two o' clock), then place black...
  18. FuZZ1L0G1C

    Get your tin foil hats out....

    For those wanting to (try) block cell-phone RF, this thread on MyBB has hints. https://mybroadband.co.za/news/security/246357-putting-a-smartphone-in-a-tinfoil-shoebox.html
  19. FuZZ1L0G1C

    Get your tin foil hats out....

    A friend who used to live near us was gifted a fancy Samsung dual-camera phone for Christmas. At first, she was thrilled with its functions, but then became paranoid about the front video-call / selfie camera, as anybody could 'spy on her', so she stuck a square of black insulation tape over the...
  20. FuZZ1L0G1C

    Will you become a ghoul from climbing a radio tower?

    A long time ago, there was an article in a rag-mag about an RF technician who developed skin cancer, then sued his employers for compensation, as he worked for long periods near live commercial VHF transmitters. In another case, a guy allegedly received second-degree burns on exposed skin areas...
Top