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  1. CDRIVE

    Simple Phototransistor switch circuit

    If they're red LEDs and your VCC >= 6V you can wire the LEDs like this. Chris Correction: You can change "can" to "should"! ;)
  2. CDRIVE

    Project using a strong 12 volt motor

    That's not the only load on that fuse. I would fully expect your wiper motor to pull about 5 to 7 Amps loaded or at start. Chris
  3. CDRIVE

    Simple Phototransistor switch circuit

    This is a DC Transfer Characteristic Analysis with Hysteresis included. Hysteresis (if any) is analyzed by the following.... VF2 sweeps from 9V to 0V. VF2 then sweeps from 0V to 9V. So, the VF1 plot you see reflects U1's output going High when the Trigger pin voltage (VF2) falls below 3V...
  4. CDRIVE

    Can You Find Funny Statement?

    I watch quite a few machinist vids on youtube. This gentleman (Halligan) makes some of the better ones, along with Mr.Pete (Tublacain) and Keith Fenner who's one "Can do kind of guy"! Anyway, this Halligan vid is about magnetizing and demagnetizing tools. There's nothing about this video...
  5. CDRIVE

    Test Rig, Need Advice

    Those are probably in house Motorola numbers. You may not find any info on them. You also may want to familiarize yourself with CAN_BUS architecture. http://www.youtube.com/watch?feature=player_detailpage&v=fTWp6bFIt0s http://en.wikipedia.org/wiki/CAN_bus...
  6. CDRIVE

    Flashing 5watt led?

    The LEDs flashing. Chris
  7. CDRIVE

    Flashing 5watt led?

    Yes, I'd appreciate that. Chris
  8. CDRIVE

    Project using a strong 12 volt motor

    Good idea Steve but he'd be wise to not rely on merely probe/touch contact to measure it. Chris
  9. CDRIVE

    Test Rig, Need Advice

    Have you Googled the data type? This is just an educated guess but I would think it's Serial Data. Chris
  10. CDRIVE

    Flashing 5watt led?

    Hey, thanks for the vid! Yeah, a DVM can't respond accurately to pulses that short. Too bad you didn't keep the cam on the LEDs longer. Since everything I post here is simulated I never get to see the final (real thing) circuit actually working. :) Chris
  11. CDRIVE

    Simple Phototransistor switch circuit

    Here's some curves for you. Chris
  12. CDRIVE

    Simple Phototransistor switch circuit

    Why would a feedback resistor be needed? The trigger pin needs <=1/3 Vcc to trigger the output high. After that event occures it requires >=2/3VCC to trigger it low again. That's plenty of hysteresis. ;) Chris. Edit: I think I have at least two errors in my statement. I'm working it out...
  13. CDRIVE

    Project using a strong 12 volt motor

    That implies that the manufacturer shouldn't bother listing it on the data plate because it varies with the load. :) The ebay (10A) PWM model that I posted the link to should be fine because I doubt your motor will pull >10A. Chris
  14. CDRIVE

    hall sensor - quiscent voltage

    OK, sorry about that. It should be close to zero then. Once again... bad sensor, wired wrong? Not much options left. Chris
  15. CDRIVE

    Simple Phototransistor switch circuit

    A 555 makes a decent Schmitt trigger Chris
  16. CDRIVE

    hall sensor - quiscent voltage

    Initially I was betting that a 47R was mistaken for a 4.7K but the Data Sheet specs Zo = 2R min - 5R max. So even a 47R wouldn't load it this much. What does the output measure with no load? Second thought... The A1301 is Kaput. Chris
  17. CDRIVE

    Help! Signal Inverter

    Passively? No, I can't think of a thing. Chris
  18. CDRIVE

    Project using a strong 12 volt motor

    I would think that your motor draws less than 5A. Do you know what it draws? Chris
  19. CDRIVE

    Flashing 5watt led?

    Sounds good. Put it up on youtube. Chris
  20. CDRIVE

    Flashing 5watt led?

    I'm not even going to try to understand that statement but I'll take your word for it. :) Chris
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