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  1. CDRIVE

    Auto garage door opener

    I'm going to assume that your existing pushbutton switches are momentary. In this case you're inside panel will have the up & down switches wired in parallel with its corresponding garage switch. Be aware that what your doing is dangerous! It would probably void the liability section in your...
  2. CDRIVE

    Sensor Project for Airplane Product

    I forgot to mention this... If you're going to dabble with you may want to learn the industry terms.... Avionics. Chris
  3. CDRIVE

    Sensor Project for Airplane Product

    Dave is correct when he told you our membership are primarily hobbyists but that doesn't mean that we're devoid of engineers and techs. Over decades I've been approached by many aspiring entrepreneurs that have nothing more than a concept but few skills to compliment same. The propositions...
  4. CDRIVE

    Trotline Finder

    Kyle, this link https://www.electronicspoint.com/rf-project-t260000.html from another thread might interest you. Particularly the Ebay reference by Bob. You may want to search there too. Heck, the OP might be fishing in your pond! :D Chris
  5. CDRIVE

    Battery Powered Power Supply

    I guess my eyes don't make a good benchmark for schematic readability. My eyes are old and tired. Both of those prints look washed out to me. I find the contrast awful. I can barely read the text in the schematic and that's after I've magnified it. After magnifying it I'm back to scrolling it...
  6. CDRIVE

    Glow Baton Repair

    Is there any evidence that it ever got wet? Chris
  7. CDRIVE

    555 astable circuit help

    Oops! I just noticed this. Sucking 100mA off a feeble 9V stack is really milking the cow dry! On the other hand your duty cycle is short so that's a saving grace. ;) Chris
  8. CDRIVE

    Glow Baton Repair

    Not that it has anything to do with your problem but the board appears to have two LEDs wired in parallel, That's usually a no - no. Chris
  9. CDRIVE

    soundfly sd transmitter (which wire goes where?)

    Please post a closeup of the component side of the board. Chris
  10. CDRIVE

    Heater element continuity test with multimeter

    I don't think you need to test the element any further. That test should suffice. It's open. Chris
  11. CDRIVE

    555 astable circuit help

    I didn't run the numbers but it's far more likely that Steve posted 150K because it's the nearest standard value, There's nothing in this application that needs absolute values. Chris
  12. CDRIVE

    Battery Powered Power Supply

    I think you're going to have to eliminate as much white space as you can. It's too difficult to analyze a schematic that has to be scrolled. ;) Chris
  13. CDRIVE

    Battery Powered Power Supply

    Why does this circuit look familiar? Maybe it's just all the white space or is it the RJ45 connector? Chris
  14. CDRIVE

    Electric Gloves

    Edison wasn't an idiot. Though AC as a power source may have been new to him I'm sure he understood the basics of why it was superior. He was between a rock and a hard place with $$$$ invested in DC power transmission. For certain it was a stain on his legacy. Chris
  15. CDRIVE

    High Frequency Preamp

    I don't get T2. It's an NPN. I would think it should be a PNP. Chris
  16. CDRIVE

    Solenoid Alarm Clock in Series -- Voltage Problems –Amplification

    This statement makes me suspicious that the voltage you're measuring is not DC but rather pulsating DC (audio frequency) driving a Piezo. Chris
  17. CDRIVE

    Trotline Finder

    I must say that I enjoyed Mongrel Shark's video but I think Kris' GPS solution is the most practical. Back in the day I used to find my way back to hot lobster holes off the coast using a LORAN and a Chart Recorder. They had nowhere near the resolution of a GPS. Now, getting back to Mongrel...
  18. CDRIVE

    LED on AC Mains

    Since it's not uncommon for a newbie to begin a post with "I found this on Instructables..." maybe we need a early warning system. Chris
  19. CDRIVE

    LED on AC Mains

    I've been wanting to say this for quite some time. That website is a lawsuit looking for a place to happen! Absolutely the worst crap science found on the net! :eek: For the most part it's the place to go to learn how NOT to do something! Chris
  20. CDRIVE

    Electric Gloves

    You wouldn't by any chance be located near Island Lake Illinois or have any relatives there? We have a member that's located there. You two should break bread and have a beer summit. :rolleyes: Chris
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