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  1. (*steve*)

    [BASIC] How to interpret this circuit (including diodes), need detail explanation

    Do you understand what a voltage divider does?
  2. (*steve*)

    Transistor pair to switch between Voltages

    Resistor from gate to source. Source connected to +12V. NPN transistor with emitter grounded, collector to gate, and base via a resistor to the microcontroller. When the output is high, the MOSFET will be on. Some of the other gobbledygook was autocorrect nonsense.
  3. (*steve*)

    Help with a stepper motor IC

    Do you have the MODE and CWD pins connected and have you set them correctly?
  4. (*steve*)

    Help with a stepper motor IC

    It sounds like you have it right. It might be worth swapping the connections to one winding around.
  5. (*steve*)

    Help with a stepper motor IC

    You'll also need to use the MODE and CWD pins. Clearly the stepper motor also need to be connected correctly The 6 wire interface will have a pair of windings with centre taps. Have you determined which wire's are what? It looks like that controller switches to ground. It may be...
  6. (*steve*)

    Help with a stepper motor IC

    I recommend you read some more about driving stepper motors. Typically you need to manipulate more than one on on the microcontroller, mostly because you're controlling several windings. Also, an Arduino can't drive a stepper motor directly, so you'll need either some sort of driver chip or...
  7. (*steve*)

    Looking for a part

    @Alphabet_Soup, you've probably made the classic mistake of posting a question in terms of how you think your actual problem will be solved. Unfortunately this often obscures what the actual problem is. For example, your problem might be that you want to connect a USB stick simultaneously to...
  8. (*steve*)

    Looking for a part

    Well, at least you got a response. I didn't respond because I have exactly zero idea what you want to do.
  9. (*steve*)

    LT1528 voltage drops too much

    The dataset recommends components for a reason. It is possible that the regulator will oscillate with the incorrect type or value components. This MAY be a reason why the output suddenly changed (in this case because it may have stopped oscillating).
  10. (*steve*)

    [BASIC] How to interpret this circuit (including diodes), need detail explanation

    Assume the diodes are perfect. Remove D1 from the circuit and write a formula to describe Vout in terms of Vin for a positive Vin. Next consider the effect of a perfect D1. Lastly, what happens for a negative Vin?
  11. (*steve*)

    Woo Hoo HP5316A

    And he is a small battery powered meter I was given. It's a little dodgy, but better than I feared. The input is the GPS. Edit: looks like about 5ppm out, or an order of magnitude better than my rule of thumb for a crystal oscillator (0.005℅, 50ppm). I guess that's either lucky or it has...
  12. (*steve*)

    Woo Hoo HP5316A

    At 2*10^-8 this morning with an ambient temperature around 20°C
  13. (*steve*)

    Transistor pair to switch between Voltages

    No, you want the gate to be high UNLESS the output is high. With the gate high the MOSFET is off. You have drawn the MOSFET upside down.
  14. (*steve*)

    Woo Hoo HP5316A

    The 5334b doesn't have an oven, but if I was particularly interested I could probably fit one. However I have both a GPS and a rubidium standard, so I could just use them as external references. But the 5316 is pretty darn good on its own. I found that after 24 hours the difference between...
  15. (*steve*)

    Hiring somebody to draw a stereo headphone amplifier circuit

    You've left out one important detail, do you want the microphones to be at all directional? Also, what are you thinking of paying? Does something in the range of a couple of hundred dollars seem like what you're expecting? Are you expecting a PCB design? Your going to get pretty ordinary...
  16. (*steve*)

    Making It High Impedance

    Without using an external transistor, writing a 1 to the port will make the output go high.
  17. (*steve*)

    Hey, anyone want something they can take into space?

    Are you still technically a USA customer if you arrange delivery to the ISS? What would return postage cost? I'm pretty sure it would be tracked, so eBay would approve. It would just be really cool to have one of these. Although I'm not sure it's quite with what they are asking just for the...
  18. (*steve*)

    Woo Hoo HP5316A

    And of course it's an OCXO not a TCXO. Given that the accuracy of these is around +/-2*10^-8 over a 24 hour period, it makes more sense. The long term accuracy is only +/-4*10^-7, it seems lucky, but the labeling on the unit suggests it was regularly calibrated and my understanding is that...
  19. (*steve*)

    Woo Hoo HP5316A

    This is the sort of thing I expect to see. When I compare the TCXO output to the GPS I see a slow drift between them. I'm beginning to doubt my understanding of the math function on the counter as the drift is much faster than I would expect from 1 part in 10^9. It looks more like 0.25Hz...
  20. (*steve*)

    Replacement relays?

    Digikey typically has a link to the data sheet. Is it absent on these pages?
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