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  1. hevans1944

    Relay question

    You need to specify a charging current to calculate a charging delay for a capacitor. Depending on the source resistance and logic power supply voltage, your capacitor may never reach the logic-one level switching threshold. In any event, whatever delay is created only occurs if the switch (you...
  2. hevans1944

    Relay question

    Okay, @twister, WTF is the rest of the circuit that behaves the way the OP wants it to behave? Your so-called timer requires the resistor to be in series, charging the capacitor, NOT in parallel discharging it. Your post is no help at all, and you obviously do not understand what the OP wants to...
  3. hevans1944

    Dsc1616 with pk5500

    So as an HVAC professional who installs their equipment, what is preventing you from opening an account?
  4. hevans1944

    Woo-Woo DC circuit for electrolysis

    Your final circuit looks okay. Does momentarily pressing the switch connected to IN1 cause the relay to actuate (reversing the polarity of the output) and the timer to reset and start again? My wife and I get our supply of colloidal silver from silver-plated flatware obtained from estate sales...
  5. hevans1944

    Need help with Arduino Code for coil winder

    At Electronics Point we try to help those who help themselves. Seldom will anyone here help solve a whole project design while you do nothing. This is a hobbyist web site and as a hobbyist you are expected to actively participate. So, go back and read what @Harald Kapp asked you to do in post...
  6. hevans1944

    Dsc1616 with pk5500

    Have you tried talking to anyone at this website?
  7. hevans1944

    building a noise activated sensor to record the noise and duration the noise is made

    @tblane2omconnolly: Did you even READ response #3? A "noise sensor" won't just trigger your computer to record a barking dog. It will trigger the recording on ANY arbitrary noise that meets the triggering requirements. In Ohio, at one time feral cats were considered "fair game" and could be...
  8. hevans1944

    Load cell + hx711 = drifting value

    Without seeing your experimental setup, I would first suspect the plastic holder of your fiber. The metal components, such as the spring, do not appear to be a factor, nor does the load cell since there are situations, such as adding and removing weights by hand, where it performs to...
  9. hevans1944

    Relay question

    Thank you, @Alec_t. I reckon i'm just lazy because I should have been able to find those myself. I agree that having to reverse the magnetic field (and initially apply it in the correct direction to latch the output!) is not in the best interest of the OP. I recall that it is possible to use a...
  10. hevans1944

    Relay question

    I thought that was they whole idea behind using a Microchip PIC. You do some house-keeping to debounce the switch input (if necessary), check the state transition clock to see if a 5 second delay (or more) has expired since the last switch state-change was sensed and acted upon, and then change...
  11. hevans1944

    Hand on the loading coil

    Sure, your hand acts as one plate of a capacitor, grounded to earth through your body. The wire of the coil acts as the other plate, also eventually referenced to earth ground but also part of resonant tuned circuit. So changing any of the physical parameters, such as the position of your hand...
  12. hevans1944

    Relay question

    Replacing the relay with a switching transistor might be difficult if several sets of contacts are required. The OP didn't specify what relay is to be controlled, how much current and voltage it switches, whether the relay switches AC or DC, what sort of coil the relay has. Lots of missing...
  13. hevans1944

    Hand on the loading coil

    Yep, those touring events can attract huge crowds and the band needs a lot of volume to heard over the crowd noise. I used to stand next to a set a speakers on a small stage, listening to music played by a local house band in a nightclub in the late 1960s. Wonderful feeling to actually feel the...
  14. hevans1944

    Hand on the loading coil

    Thank you for the kind remarks. I LOVE telling stories, and hope it helps those coming up to discover where this wonderful industry came from. Back in the day, when I was in high school, none of my fellow students had ever heard of Nikola Tesla. This upset me a lot because I knew that Tesla...
  15. hevans1944

    I think I'm starting a collection

    Some of your box collection appear to be quite well-made. The boxes would pro'ly be worth big bux if you removed the antique electronics stuff and cleaned and polished them.:eek: You need to include the part number in the Google string. When you do that, it leads to this page of useful...
  16. hevans1944

    Hand on the loading coil

    Thanks for the reply @aurelZ. I did see an example of your programming on your blog, but as I said elsewhere I am not a programmer... maybe a program hacker could describe what I can do if sufficiently motivated, but I've long ago turned to others (such as yourself) if any serious programming...
  17. hevans1944

    Hand on the loading coil

    It's really unfortunate that the circuit diagram you just uploaded is not the same circuit as the one you posted earlier. I guess those "monkey see, monkey do" details don't matter much to you. Did you try to copy your circuit from this blog post? Or maybe it was this one? I am quite familiar...
  18. hevans1944

    Hand on the loading coil

    To which you posted the schematic image below of a "one transistor superhet." Your link points to another EP thread that you started. The thread has a link to a Japanese article claiming to offer a toroid-wound transformer to use with an "improved" FM ratio detector. Which is supposed to mean...
  19. hevans1944

    Sequencing output based on Power Cycling

    If it works for you, it ain't stupid. Simple is also good; simple and inexpensive is even better! Glad you found a solution to your irrigation problem. Most folks who hang out here apparently are not as strapped for time as you are. Electronics may have been a significant part of our working...
  20. hevans1944

    Questions lithium polymer battery

    @gamer87: this thread is now at 106 posts, since your original post on January 10, 2020. You have received excellent advice which you have apparently decided to ignore. Instead you have been re-posting the same questions repeatedly. What more, exactly, do you expect to learn here? Are you aware...
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