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  1. KJ6EAD

    How to maintain constant voltage of 5 volt throughout 14 IC including 555 timer?

    You need a power supply capable of delivering more current. For portable use, maybe 6 or 8 AA batteries in a holder or for stationary use, a surplus 5V cell phone charger bypassing the regulator or a 9V plug in power supply (wall wart) would work. Remember that all those components connected in...
  2. KJ6EAD

    ? on wires to use for headphone repair

    Try searching for litz wire. Many headphones are wired with it and companies that make litz wire also often make other specialty wire such as miniature coax and high flexibility multiconductor cables but good luck buying small quantities.
  3. KJ6EAD

    Can you read Mandarin? ..or maybe you can tell what this is by looking.

    Here's a Panasonic version of your thermal cutoff at Digikey. To be effective, the device must be in close thermal contact with the heat source. http://www.digikey.com/product-detail/en/EYP-2BN124/P10922-ND/295818
  4. KJ6EAD

    Does anyone recognise this symbol?

    It's an obsolete JIS (Japanese Industrial Standards) symbol for a thermistor.
  5. KJ6EAD

    It is designed to run off of 12VDC, I would like it to run off 24VDC

    The value of a kit like that is mostly in the PCB, not the components so why not change the relay to a 24V version. Kris suggested this while I was typing. Velleman sells this one (VR15M241C): http://www.velleman.eu/products/view/?country=be&lang=en&id=17776 It's just the 24V, contact form...
  6. KJ6EAD

    CB whips instead of the standard radio antennae

    Yes, and to muddy the waters further, the thread described (M5 x 0.8) may be an SMA connector.
  7. KJ6EAD

    ID diode help

    That voltage, if accurate, suggests it may be a schottky diode.
  8. KJ6EAD

    what is this Circuit ?

    I think the "circuit" is a mistake. It looks like a filter topology but it's weirdly drawn and has two different R6's. Those factors combined with an unspecified opamp make it look like a school problem. Either there was a transcription error from whatever source it came from or it's an...
  9. KJ6EAD

    italamec FB 333.10 24v 3 amp diode relay - Please help !!

    O.V.R.A. srl, an Italian automotive parts distributor, listed it in their catalog in 2012. They're in Bari, Italy. Your boss should send you there to get the part. I suppose you could call or use their website but that's less fun.
  10. KJ6EAD

    VIP???

    I am mightily relieved! Until now I thought the moderators had seen through my facade and cleverly labeled me with an acronym for vacuous, insufferable pest.
  11. KJ6EAD

    Am I asking the impossible? 12v (input) LED drivers

    It may be easier, cheaper and/or more efficient to get lights that fit your form factor and output requirements that are designed to operate from 12VDC…unless you're committed to the 220VAC panels for some reason.
  12. KJ6EAD

    Before all publications went through the marketing department first...

    They mispelled "planar" too.
  13. KJ6EAD

    Stranded Hookup Wire and Logic Circuits?

    22 gauge solid is ideal for breadboard use so maybe the concern with stranded wire was in regard to it's inappropriateness for solderless breadboards. If the information came from a Radio Shack employee, it can be disregarded with prejudice.
  14. KJ6EAD

    WTF FedEx????

    UPS standard procedure requires any package marked "FRAGILE" be thrown into the delivery truck from a third floor window then delivered to the correct street address in the wrong zip code, usually a vacant lot or crack house. If the sender requests identifcation and a signature, the package will...
  15. KJ6EAD

    List of EDA packages

    Thanks Kris, Olivier and Dan. This is very helpful information and comes at just the right time as I'm looking for a package for hobby use at home and a less costly alternative to Altium for work.
  16. KJ6EAD

    "Has it got the Cobalt?" (story)

    Thanks for sharing that excellent bit of personal work history. You were there participating in a pivotal era in computer development.
  17. KJ6EAD

    "Has it got the Cobalt?" (story)

    I'm sad to say I got the Cobalt/COBOL alliteration without cheating. Bob, the PDP-11 was fancy new stuff when I loaded the bootloader on the Data General Eclipse at my high school...then loaded the language translator via octal paper tape! Wasn't Tracy Kidder's book, "The Soul of a New...
  18. KJ6EAD

    Looking for Higher powered UV LEDs

    http://www.nichia.co.jp/en/product/uvled.html
  19. KJ6EAD

    Blowing a 3A fuse with an AA battery?

    Be careful using your meter to measure high currents. You're likely to blow a fuse in your meter.
  20. KJ6EAD

    Blowing a 3A fuse with an AA battery?

    Two possibilities in order of likelihood: 1. You used a battery that is dead or nearly dead such as the one intentionally shorted in the previous experiment; 2. You have a fuse of a higher rating than specified for the experiment.
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