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  1. UhClem replied to the thread Launch Controller Using Raspberry Pi?.

    1) They aren't isolating anything since Vcc and ground are identical on both sides. It would work better if you drove the BJT coil...

    Feb 25, 2020 at 6:00 PM
  2. UhClem replied to the thread Launch Controller Using Raspberry Pi?.

    No. Prior to 2012 onboard systems weren't mentioned at all. See the 2012 Report on Proposals and Report on Comments.

    Feb 25, 2020 at 12:08 AM
  3. UhClem replied to the thread Launch Controller Using Raspberry Pi?.

    Comments: It wasn't at all clear which schematic capture program you are using. I took a chance and it turned out to be gschem so I...

    Feb 24, 2020 at 9:07 PM
  4. UhClem posted a new thread.

    Alternate site dimension rule

    For quite a while now I have been attempting to resolve a problem. NFPA 1122 has an alternate site dimension requirement of half the...

    Forum: Low Power Rocketry (LPR)

    Feb 23, 2020 at 8:55 PM
  5. UhClem replied to the thread Launch Controller Using Raspberry Pi?.

    Use one DPDT per pad so that each user has control of their pad. Disconnects igniter from the firing circuit and presents it with a short.

    Feb 22, 2020 at 7:10 PM
  6. UhClem replied to the thread Launch Controller Using Raspberry Pi?.

    The momentary requirement is on the button pushing side. As is the requirement for a removable safety interlock in series with that...

    Feb 22, 2020 at 5:20 PM
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