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  1. CDRIVE

    Who Is This?

    Kris, I see your face and it looks NAKED!! :D
  2. CDRIVE

    Photography Laser Trigger

    I'm going to be heading out to the watering hole. You, on the other hand, can grab a Goldie from the frig and enjoy the read..:p https://www.electronicspoint.com/bipolar-junction-transistors-f141.html Chris
  3. CDRIVE

    Can opamp provide low voltage output?

    Did you see any in my plot? After moving the feedback node, as Kris suggested, It's a straight line. Chris
  4. CDRIVE

    Photography Laser Trigger

    How I answer this depends on how you answer this.. Do you understand basic BJT theory of operation? Chris
  5. CDRIVE

    Motorcycle Flasher Issue

    There's no Vcc decoupling there and there's probably none on the input to your converter either. It's also not a bad idea to precede the input to the converter with a low value resistor followed by a 9V Zener with anode connected to Gnd. Are you really using a 2N3055 power transistor? This...
  6. CDRIVE

    Photography Laser Trigger

    No, light striking the photo sensitive base forward biases the Base Emitter junction causing conduction between the Collector - Emitter junction. This, in turn, causes current to flow through the Collector resistor supplied by the Vcc supply. Chris
  7. CDRIVE

    Basic Electrical Work

    What's the purpose of the Diode connected to the GND terminal of the 5V regulator? If you're intent is to get 5.7V from the output pin of the regulator you have it wired wrong. The polarity of the Diode is backward and your USB negative (GND) pin is not connected to circuit ground. I assume...
  8. CDRIVE

    Photography Laser Trigger

    Photo Transistor is a linear device. Just like saturating a transistor they can be operated as a switch, IE in digital environments too. Chris
  9. CDRIVE

    Help in identifying the schematic symbol

    Now that's an RF enclosure! Very mil spec-esc. ;) Chris
  10. CDRIVE

    Inductive Voltage Spike in Relay

    This would be a close contest against the 1N4001. I don't think I'd hesitate to use either. ;) Chris
  11. CDRIVE

    Inductive Voltage Spike in Relay

    Which is probably why the ULN200X series drivers incorporate a reversed biased diode across the Ce junction as well as a common terminal that places another reverse biased diode across the coil load. Chris
  12. CDRIVE

    Motorcycle Flasher Issue

    Posting your schematic would be best. This way we can better assess where noise decoupling and surge protection will be most effective. Chris
  13. CDRIVE

    differential input buffer for PIC

    Have you considered an OptoIsolator? Chris
  14. CDRIVE

    Who Is This?

    If we start a betting pool please put me down for administrative knockout no later than 3 sentences into his third post. :p Chris
  15. CDRIVE

    Can opamp provide low voltage output?

    Kris, that's a very good point and an brain fart oversight on my part. I moved the feedback node to the cathode of the diode. Here's the new plot results. No knee!!! ;) Chris
  16. CDRIVE

    Who Is This?

    The mods may want to keep tabs on his avatar. He changed it and he's probably capable of changing it again to something very offensive. Chris
  17. CDRIVE

    Who Is This?

    Oh OK, the chronology of events are coming back to me now. Damn, they did a major rebuild on your ticker. Did they lap the valves and check for a stretched timing belt while they were in there? :eek: By the way, it's hard to trust a beardless man. I mean you always have that nagging feeling...
  18. CDRIVE

    Help with thermal switches

    Sorry about that. I didn't know or I missed your size requirements. Chris
  19. CDRIVE

    Can opamp provide low voltage output?

    I read the HV9910B data sheet and I see what you're referring to. You want to use the LD (Linear Dimming) input pin that's spec'd at 0 to 250mV. If you're going to stick with the LM358 you may want to consider doing something like this. The Diode in the output should provide the zero or near...
  20. CDRIVE

    1 Mhz oscillator needed

    I can't think of any solution easier than this with the exception of a kit. Chris
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