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  1. hevans1944

    Touch switch for heating element

    At that price, it's worth a try. It probably does NOT delay the turn-on until the zero-crossing of the AC line, instead just applying an "on" voltage to the gate of an internal TRIAC when the DC control input is at a high enough voltage. If it does use a TRIAC, commutation will occur...
  2. hevans1944

    Running high current electric solenoid using a H-bridge

    The Kliktronic dual-coil solenoid is the only thing you need to purchase from Kliktronic. They had someone engineer the two coils and the actuator armature (the part that interacts with the magnetic fields of the coils) to produce the stroke they needed (one inch) at the force and speed they...
  3. hevans1944

    Successive approximation ADC

    Each bit in the digital result has a different voltage "weight" that is the reference voltage divided by the maximum value of the output multiplied by 2^N where N is the bit position. So, for a 12-bit A/D, N = 0, 1, 2, … 11. A 12-bit A/D with a full-scale input of 1.000 volts should result in an...
  4. hevans1944

    adding fans and heatsinks to components

    Well, he did say he was "new to modding" so I wouldn't assume he understands AC from DC, much less where to find the correct DC voltage and how to make connections to it. Hence the suggestion to use a separate wall-wart DC power supply. @dorke expressed my sentiments exactly.
  5. hevans1944

    adding fans and heatsinks to components

    What transformer? These 12 V computer fans operate from DC. Transformers only provide AC. Power your fans from a 12 V DC wall-wart providing an appropriate current capability. With judicious location of the fan(s), you won't need to add any heat sinks. Direct the moving air over the parts...
  6. hevans1944

    Touch switch for heating element

    I should mention that if you are going to use an Arduino, you don't really need the add-on pulser controller. The Arduino is perfectly capable of sending pulses to your SSRs... it can even be programmed for either pulse-width modulation (PWM) of the SSRs, or variable duty-cycle, integral number...
  7. hevans1944

    Running high current electric solenoid using a H-bridge

    And the actuator rod "floats" on the foot-shift mechanism (no spring inside), so as not to interfere with shifting by non-disabled riders, which is a good idea if you share your MC or later want to sell it. The Kliktronic, according to their website, is easy to install and just as easy to...
  8. hevans1944

    How To Annoy Those Helping You Out

    The thing I hate most is folks who post me a PM for a question best addressed in the forum. There are a few here whom I will engage in a PM conversation, but only after seeing and replying to their posts in the forum. You know who you are.
  9. hevans1944

    Heating a steel strip with current? 'hot knife'

    You should use ceramic insulators to separate the hot cutting wire from the "Y" handle, allowing the cutting wire to reach a higher temperature. It is important to use a cutting wire of significantly higher resistance than the copper wire providing its current. You should terminate the cutting...
  10. hevans1944

    Overheat of electronic items

    As C3PO would say, "Ahhh, that is sooo soothing."
  11. hevans1944

    Overheat of electronic items

    I thought my answer was pretty accurate. Size of heat sink and/or fan will vary. How's that for vague and hard-hitting? That's the way I wrote winning proposal, back in the day.:D
  12. hevans1944

    Experts Only: Tesla coil

    This guy is great! Thanks for the link, @dorke!
  13. hevans1944

    Running high current electric solenoid using a H-bridge

    I seriously doubt you want to run a solenoid with an H-Bridge. The H-Bridge is typically used when you need to reverse the polarity applied to a load, as in a reversible motor direction. It is also impossible to control with PWM how far a push/pull solenoid moves unless there is a restoring...
  14. hevans1944

    About robots

    Show us a robot. They come in all sorts of different sizes and personalities. Which robot did you have in mind? Got a manufacturer's name and model number? R2D2? C3PO? An older model, like Robby the Robot perhaps?
  15. hevans1944

    Bartop Arcade Help . Monitor issue

    Thank you for not shouting. And thanks to @Gryd3 for his informed reply to your question.
  16. hevans1944

    How to maintAin electronic items?

    Treat them carefully, and if they break, throw them away and buy the latest, greatest, new replacement.
  17. hevans1944

    Overheat of electronic items

    Add a heat sink and/or cooling fan, or do both.
  18. hevans1944

    Power consumptions of electronic items.

    Unplug them or remove their battery.
  19. hevans1944

    Touch switch for heating element

    I have been told that some of my ancestors (or least neighbors) operated 'stills in the hills of West Virginia in the previous century without benefit of government supervision or permission, which was (and still is) a risky business. They didn't use electricity to heat their boilers however...
  20. hevans1944

    How To Annoy Those Helping You Out

    Better than the alternative of SHOUTING OUT WITH ALL CAPS, BOLD, and COLOR, OR ALL THREE.
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