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  1. CDRIVE

    Newbie leds for blinker lights

    Option (A): A timer circuit that begins timing when it senses that your turn signal has been turned on. At the end of the timed period it outputs a single 1 second pulse. This pulse current can drive a piezo that incorporates an integral tone oscillator. Soooo... After timeout you will hear a...
  2. CDRIVE

    Newbie leds for blinker lights

    Sounds like what you need is a timed single shot Piezo circuit. Chris
  3. CDRIVE

    Serial communication problem.

    There's quite a few versions of this Component Tester. For the price they're worth their weight in gold. Chris
  4. CDRIVE

    Increase In Output Pulse As Supply Increases In 555 Timer, Why?

    Thanks for explaining that. Chris
  5. CDRIVE

    Increase In Output Pulse As Supply Increases In 555 Timer, Why?

    I see a puny 9V battery in your video. With that in mind I don't understand any of this quote. o_O Chris
  6. CDRIVE

    Serial communication problem.

    Now there's a surprise. I had no idea there is a European version. Personally, I like EBC. Chris
  7. CDRIVE

    Testing capacitors

    I believe the Heathkit IT-11 termed it Power Factor because that measurement was intended for electro's only. It was a measurement of combined ESR and leakage that manifests itself as real power dissipated by the cap, which also reduced it's effective capacitance. I still have mine but it needs...
  8. CDRIVE

    Serial communication problem.

    I believe that reducing those values to 1KΩ will reduce switching time. Chris
  9. CDRIVE

    Static

    Stuffy is just slang for haughty, aloof, elitist, etc. I don't think that any of our members fit that description. This is despite the fact that EP is a repository of enormous brain power. o_O Chris
  10. CDRIVE

    Serial communication problem.

    Thanks for the good wishes mates. They're appreciated very much. Constantine, I don't have an answer for you. I would think that a 2N2222A would handle your baud rate. Perhaps someone else has a clue? What values are your Collector and Base resistors? Chris
  11. CDRIVE

    Static

    Sarcasm, in my opinion, is an art form in itself.:D EP is a tech forum with an impressive cadre of friendly electron and physics heads. One thing it "ain't" is stuffy! ;) Cheers, Chris
  12. CDRIVE

    Serial communication problem.

    2N2222 (fT) = 250MHz. 2N2222A (fT)= 300MHz BC547 (fT)= 300MHz Are you sure you had the pinout correct? Chris BTW: Irma left but not before it uprooted one of my large Ficus trees. It's now laying across my house and shop that's attached to my screen room and the back of my house. I tell...
  13. CDRIVE

    Static

    Darren, I hope that I didn't offend you. I did try to convey humor but I may have failed. I may have also given the impression that I have no appreciation for art, which is not the case at all. I just feel that somewhere along the historic tracks of art it was derailed by individuals that appear...
  14. CDRIVE

    Transceiver Circuit

    As a personal preference I would rather see the PTT switch shown in the RX position. A simple note "Switch shown in RX position" will suffice. Shown as is it can be interpreted as a center off switch. Chris
  15. CDRIVE

    Static

    This is a double header for me. First Kelly reinforces my point and you follow it with indignation of chimp exploitation? You must have trouble sleeping nights knowing that chimps are being held at gunpoint while being forced to paint well enough to be critiqued by ... uh ...experts. Chris
  16. CDRIVE

    Transceiver Circuit

    The arrows "indicate" the 4 common pins. Ty, you really should spend some time reading our basic electronics section. Chris
  17. CDRIVE

    Voltage regulation

    Yes, you can use multiple controllers Like This. The 12V - 40V rating is the input voltage range of the controller. It doesn't mean 12V in 40V out. PWM does not boost or reduce voltage to the load. They function by rapidly switching the load ON - OFF. It's called Pulse Width Modulation...
  18. CDRIVE

    Transceiver Circuit

    Yes, that's correct. This [ and this ] are inside the switch. I tried to find an animated slide switch on the net but didn't get any hits. The visual would help you understand. Chris
  19. CDRIVE

    OP-amp help

    Bob, thanks for the enlightenment. Chris
  20. CDRIVE

    Voltage regulation

    This approach tweaked me so I started drawing a switch over scheme from series to parallel. Damn it gets messy! :) Chris
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