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  1. CDRIVE

    555 timer reverse polarity circuit

    OK, it's Sat at the watering hole but I wanted to get these plots posted before I head out. Note: C2 Leakage is not plugged into the the plot parameters. Later. Chris
  2. CDRIVE

    555 timer reverse polarity circuit

    D1 and R5 are used to improve 50-50 symmetry. If a get time I'll post some plots with and without D1 & R5. As a side note I chose 400uF over a smaller cap like 100uF because it would force R5 to be about 4Meg; not too common. There's also another issue when very long time constants are...
  3. CDRIVE

    Problems substituting a relay

    Agreed but it would still be nice to have an RMS option for the Sine wave. It would save the time of having to calculate what your entering. I have done what Kris did but since being burned I don't forget to enter peak values any longer. I just don't want too. ;)
  4. CDRIVE

    Thinking about making a blender?

    Flea markets, consignment shops, Good Will, etc. The average newlyweds are given more blenders than four couples can use. They end up in the previously mentioned outlets. Bride: "Thanks Aunt Gertrude! How did you know that's what we needed? .. "Oh Bob, look what Aunt Gertrude gave us!". ...
  5. CDRIVE

    Thinking about making a blender?

    Yes, that's the bearing.
  6. CDRIVE

    Crystal testing

    Here's some good stuff.. http://www.axtal.com/data/publ/ukw1979_e.pdf
  7. CDRIVE

    Crystal testing

    Does this mean he doesn't need an oscillator? ... Just a psu, socket and scope? :rolleyes: Sorry, I have no self control. I just couldn't restrain myself. Besides, the opportunity was irresistible :D Please forgive me. ;) Chris
  8. CDRIVE

    Problems substituting a relay

    Yes, I've questioned why but dismissed it because the Sims are waveform plots which are instantaneous values. .;)
  9. CDRIVE

    Motion sensor alarm system schematic

    Personally, I'd rather have it trigger a web cam and the following recording .. "Don't smile. This is your mug shot and you're now on the Internet".
  10. CDRIVE

    ADE7758 Energy meter calculations help

    That link didn't load.
  11. CDRIVE

    Thinking about making a blender?

    Have you given much thought to the mechanics of this? Keeping liquid from contaminating a high speed bearing isn't trivial.
  12. CDRIVE

    Motor control diy

    You will want limit switches or sensors. Having the belt slip is a bad idea,
  13. CDRIVE

    Thinking about making a blender?

    If you design this around a 120VAC brush motor you'll want to control speed with a Triac.
  14. CDRIVE

    Problems substituting a relay

    Tina has the same conventions. It would be nice to have a lazy people button or check box to select Peak or RMS. This way the user can enter an RMS value and have it automatically converted. Chris
  15. CDRIVE

    12VDC Sp rocker can I use it on 24v circuit.

    Nice bit of sleuthing CC. Chris
  16. CDRIVE

    12VDC Sp rocker can I use it on 24v circuit.

    A 330Ω resistor in series with the lamp pin should do it. Chris
  17. CDRIVE

    Thinking about making a blender?

    The electronics won't be a big deal but making a good frozen Daiquiri takes skill.:D
  18. CDRIVE

    12VDC Sp rocker can I use it on 24v circuit.

    It's rated at 10ADC. EDIT: It doesn't state if it's 10ADC or AC. It should though!
  19. CDRIVE

    12VDC Sp rocker can I use it on 24v circuit.

    This appears to be a single pole switch with three pins, so I think it's wired like one of these but more likely to be the incandescent. Measure the lamp current @ 12V and we can go from there. Chris
  20. CDRIVE

    Could anyone just take a look?

    Well, can you think of any legitimate use for a 40W Broadcast Band FM Transmitter being built from a schematic found on the Internet? As Judge Judy says "Hey! I was born at night... but not last night". ;) Regarding your Radio Telephone license.. The FCC didn't downgrade your license. What...
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