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  1. K

    Power supply

    Well I think this will be a good learning experience. Ken
  2. K

    Power supply

    I think you may be dreaming. Sticking that extension on looks like asking for problems. Even a small difference in shaft and bore diameters is going to create a lot of run out. At high speeds and small diameter cutters, I think you would regret that decision. Machining steel...you are talking a...
  3. K

    Machines' "Parts Lists" (as opposed to a list of parts w/o ref to what machines they work in)?

    "parts lists" for (almost) any given machine."? VW Bug?...iPhone?...Vacuum cleaner? Google the make and model of the "machine" Then look for the parts list or service manual on that site. If all you have is a part, then what (*steve*) said. Ken
  4. K

    Unmarked Antenna Box - What the Heck is This Thing?

    Can you get a shot of the logo in the upper right corner. It looks like it belongs to the Mayo Clinics/Hospitals. If your dad was treated there, it probably belongs to them. Ken
  5. K

    Power supply

    And how are you going to attach milling/router bits to that motor? You will be better off time and money wise by going with something like this:https://www.inventables.com/technologies/quiet-cut-spindle Ken
  6. K

    Switch closing to pulse

    Google: 555 monostable. Ken
  7. K

    New project

    Looks like a module for a reflective IR beam break detector. Ken
  8. K

    Air actuated switches

    Bob, Tiny thermistors can respond in fractions of a second. That said. since the Wheatstone bridge would be quiescent at ambient, sucking in ambient air would do nothing. The bridge would have to be powered to self-heat two of the thermistors, so ambient air would cool them and change the...
  9. K

    LED Christmas lights gone dim

    110VAC. Two prong plug on one end and two prong socket on the other, so several strings can be run in series. Ken
  10. K

    LED Christmas lights gone dim

    All three strings are the same. Ken
  11. K

    LED Christmas lights gone dim

    We have three strings of LED Christmas lights in series around our porch. Last night, my wife noticed that the middle string in the series was out. The two strings on the each end were fine. My grand daughter said "granpa, they're not out, just dim". I brought them in, and she was right. You...
  12. K

    Air actuated switches

    A thermistor Wheatstone bridge with two in the flow and two isolated works, and deals well with ambient. But needs to be powered and amplified. Ken
  13. K

    Air actuated switches

    Berry, Must the switch maintain a closed contact while there is an increased negative pressure/flow or can it be a momentary pulse closure? Ken
  14. K

    Air actuated switches

    "small air actuated switch" How small? What voltage and current switch? Maximum price? Ken
  15. K

    OK To Reverse One of Two Batteries To Prevent Leakage?

    If your camera is like mine (AAx2), the battery compartment has a bar on the door that connects the batteries in series when closed. Place a thin strip on insulating material across the ends of the batteries before closing. Or just on top of one. But you may loose memory settings like...
  16. K

    Anyone know where I can buy one of thes buttons?

    If end activated button is OK, then Google: hand held push button Things like this all over the web: https://vetco.net/products/spst-hand-held-push-button-switch-n-o?gclid=CN-w2-XdztACFQgFaQodU3cIvw Ken
  17. K

    Anyone know where I can buy one of thes buttons?

    How close does it have to match you photo? What switch configuration? Can you add a switch to a commercial enclosure? Maybe you can find something here: Google: handheld enclosures for electronics membrane switches Ken
  18. K

    Circuit Board for Human Touch EMS-12 Massage chair

    But just in case...two photos of the missing part of the PCB. Ken
  19. K

    Circuit Board for Human Touch EMS-12 Massage chair

    Since this outfit are selling "refurbished" EMS-12 Massage chairs, maybe they can help you: http://vitalityweb.com/backstore/EMS-9.htm Ken
  20. K

    Protective grounding

    What is: IT grounding? TN grounding? RCD? Ken
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