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  1. CDRIVE

    OP-amp help

    The problem with this topic is it's treading on very thin ice. Don't be surprised if the Mods (officially) step in here. The odd thing about it is what the ISS has to do with smog? Doesn't your State use instruments to measure your emissions? Chris
  2. CDRIVE

    Voltage regulation

    You didn't mention if any of this is to be automated. In other words what determines fan RPM? The PWM Controller that Harald linked to can be controlled by means other than the on board POT; ie Thermistor control. Chris
  3. CDRIVE

    Delay off delay circuit

    A 555 Timer will trigger on the negative going edge and provides enough drive current to drive a small relay coil. However, before you go through the work of brewing your own check out Ebay under "Delay Timers". The Chinese can sell you a complete timer with 'on board relay' for less than you...
  4. CDRIVE

    Transceiver Circuit

    No! What AG drew are not jumper wires or copper traces. They're movable bars internal to the switch. He's indicating which contacts are closed (shorted) in the switch positions indicated. Chris
  5. CDRIVE

    OP-amp help

    Buying from Horror Freight (ODB2)is a crap shoot. The up side is that their return/refund policy will be satisfied with a simple ... "It's a piece of crap!" at the register. Chris
  6. CDRIVE

    OP-amp help

    It would seem unlikely that the sensor is buried within the transmission. It's more likely that it screws into the transmission outer casing. Can you give us a part number and or photo of it? You should be able to test it with a DMM set to the 10VAC scale. Chris
  7. CDRIVE

    Switching output amplifier

    I'm curious why no one replied to you. That said, are you aware that you're circuit employs an Emitter Follower? While the output logic will not be inverted it won't swing up to 5V either. Your output voltage will be closer to 4.3V. Are you OK with that? If so, a 2N2222 will do the job. The Base...
  8. CDRIVE

    Static

    As far as Darren's question is concerned: Artists are the very last people I would look to for answers about anything other than art. That would include anything social, political, religious or otherwise. Most definitely not Science! I think Leonardo Da Vinci would be the only exception. Chris
  9. CDRIVE

    Transceiver Circuit

    I believe the pins I've marked "C" are the common pins for the 4 groups of SPDT contacts. The pins directly above and below each common are the two poles for each SPDT switch. Because they're packaged as a single switch package this switch is classified as a 4PDT slide switch. Chris
  10. CDRIVE

    Static

    Here's a feel good animated movie. In "Team America World Police" you get to see a bunch of the usual DC and Hollywood pin heads literally explode! http://www.imdb.com/title/tt0372588/ Chris
  11. CDRIVE

    Turn on device when car speaker signal detected

    Ha, I'll have to take a rain check on that. The wife and I watched a Norwegian produced film this past year. It was filmed entirely on location. By the time it was over I was suffering with snow blindness and frostbite! :D Good luck, Chris
  12. CDRIVE

    Trying to detect wake/sleep from USB port

    Glad to read you've PIC'd your way through this. Though I'm surprised that the TV polls the mouse. Seems logically backward. Good luck, Chris
  13. CDRIVE

    Trouble getting enough power to LED strip

    You were fortunate to find EP. While Automation Direct is undoubtedly the most popular manufacturer of HSM VFD's, I doubt that their forum is geared for the level of electronics knowledge found here. If I ever get the bug to replace the original motor in my SB Heavy10 with a Baldor 3PH it will...
  14. CDRIVE

    Turn on device when car speaker signal detected

    I edited your schematic over my morning gallon of coffee. I didn't remember what this thread was about and didn't sift back through the thread until after my morning dose of medications. I see now that I didn't answer any of your queries. Offhand I don't see anything glaringly wrong there...
  15. CDRIVE

    Need Help

    Yeah, I could think of more dangerous uses for it but that one would rank up near the top too! :eek: Chris
  16. CDRIVE

    Turn on device when car speaker signal detected

    Paint is your friend. If you're ever in town you owe me a beer. Chris
  17. CDRIVE

    BPSK Waveform

    Actually, I knew you meant "two outputs" but I couldn't resist! :) Chris
  18. CDRIVE

    BPSK Waveform

    Bob, I searched through my PIC datasheets I have in stock but I can't find any with two or even one utputd. Sending this stuff on your smartphone? You need smaller thumbs!:p Chris
  19. CDRIVE

    No Email Alerts

    Ian that fixed it. Thanks bunches, Chris
  20. CDRIVE

    No Email Alerts

    Ian, my spam folder was bulging at the seams with EP. I guess I should have checked it first before bothering you. I rarely navigate to my Yahoo mail because I hate it. That's why I use a client. I set up a filter to pass EP. Let's hope it works. At least now I know where the problem is...
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