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  1. KJ6EAD

    Double Potentiometer Joystick

    http://www.suzohapp.com/
  2. KJ6EAD

    basic electronics (or is it?) --> carnival project

    You may be looking for a "reaction speed test" type of circuit.
  3. KJ6EAD

    Halloween Project Help!

    One of the easiest solutions is to use a sound-to-light control such as the Velleman MK186 and use an appropriate sound effect source to trigger it.
  4. KJ6EAD

    Help on Idea

    What you're describing is a typical sound-to-light circuit. Here's one version available as a kit: http://www.vellemanusa.com/products/view/?id=350678
  5. KJ6EAD

    Death of a yellow jacket

    http://en.m.wikipedia.org/wiki/Yellow_jacket
  6. KJ6EAD

    Electronic scanner info help please

    Here's another twist. Have the device detected by the VIP's security team while they're sweeping a room for bugs with a non-linear junction detector, then follow up with the X-ray to determine the composition of the device.
  7. KJ6EAD

    Looking for easy Breadboard projects

    The logical next circuit might be controlling the LED of the previous circuit with a transistor, then latching it on as a third step.
  8. KJ6EAD

    Help required with 555 timer project

    You seem to be laboring under the impression that all circuits consist of a single path for all current flow. This would be true only for the simplest series circuits. If you'll download a block diagram of the 555 usually included with the datasheet but available from many other sources, you'll...
  9. KJ6EAD

    Geeky rulers

    I already have a laser-etched black anodized aluminum ruler (trade show swag from the 90's). It has inch and metric scales and an image of a QFP package etched on it so no thanks to paying for one of David Jones' leftovers.
  10. KJ6EAD

    What is this?

    The acronym IRED (infrared emitting diode) is in limited use while the redundant and less accurate term 'infrared LED' is more common. Such are the vagaries of language. On second thought, your junk device may be an RF remote. It may have been for a car, a toy, a ceiling fan, an alarm system or...
  11. KJ6EAD

    What is this?

    You didn't show the front which presumably has at least one pushbutton. It's a key fob remote control, missing it's back cover and possibly it's IRED. The single battery modification was probably done in manufacturing.
  12. KJ6EAD

    Problem Tinnning Very Small Stranded Wire

    The wire you're trying to use is called litz wire. As you suspected, each strand is coated with a layer of insulation. There are methods of stripping that include high temperature solder pots, abrasives and strong chemicals such as hot lye solution. You'd probably be better off using some type...
  13. KJ6EAD

    Help with power supply for pinball machine

    Excess voltage will damage things. Inadequate current capacity will cause dimming and damage or destroy the power supply or transformer. Extra current capacity will do no harm to circuit components and will increase the life of the power supply or transformer.
  14. KJ6EAD

    Help with power supply for pinball machine

    You can use a 6.3V 10A power transformer to drive the bulbs with AC. This is cheaper than an AC to DC supply and better for bulb life (DC notches the bulb filaments). I recommend fusing the secondary (output) at 10A (you should be using 7.5 normally) and the primary (input) at 500mA...
  15. KJ6EAD

    what is it and what dose it do

    Thick film resistor network, 680Ω isolated, not bussed. http://www.bitechnologies.com/pdfs/l.pdf
  16. KJ6EAD

    Identifying 3 unkown components

    Ferrites, electrolytic capacitors and axial leaded fuses or precision resistors?
  17. KJ6EAD

    How to address a moderator

    That should be "Please, sir moderator, may I see it also?" It wouldn't hurt to add some superfluous compliments such as "You're so kind and generous with your vast knowledge" and grovel a bit as well. ;)
  18. KJ6EAD

    Requires 70 Volts AC

    Hammond makes a 2A (167L70) and a 4A (167N70). http://www.hammondmfg.com/167.htm http://www.hammondmfg.com/pdf/Hammond_Sec_Volt_Sel.pdf
  19. KJ6EAD

    this bugs me / noob question`

    The current specifications for LEDs are governed by thermodynamics, the ability of the die to dissipate heat in a given packaging and environment. For an unknown LED, precise thermal measurements would be necessary to characterize it's performance and as Bob humorously suggested, destructive...
  20. KJ6EAD

    Emergency Vehicle Lights

    I think it's likely that any emergency lighting would be required to be approved by the state or federal government which would preclude any DIY solution.
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