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choochoo_baloo

Members
  • Content Count

    280
  • Joined

  • Last visited

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42 Excellent

About choochoo_baloo

  • Rank
    Star Forming

Profile Information

  • Gender
    Male
  • Interests
    O gauge railway modelling
    Astronomy
    Model engineering
  • Location
    Somerset
  1. Thanks for the reply. I'm happy to meet with a few others during the autumn to do our own star party thing one night or so. I will miss a semi-rural location! The Cardiff society looks pretty established?
  2. Having read up that link you helpfully gave, it seems they're INDI based, and with that very limited support of beginner friendly programs I'd us elike Backyard EOS or Sequence Generator Pro. So I'll rule out the Asiair. Exactly Sven: *only* hardware control. I plan to subsequent processing on another beefy desktop. As I've put above, I think it has to be ASCOM for foreseeable future and therefore by extension Win 10. Can you therefore make any recommendations?
  3. After a failing laptop and wanting to take a step closer to remote operation, I've decided to buy a mini PC to attach to and thus ride around with the scopes themselves. What models do others use. My thoughts so far: 1) For build quality and stability INtel NUCs 2) Small size: Intel compute stick 2) Bang for buck inc. a beefy WiFi antenna: Minix Neo Any suggestions appreciated.
  4. Hello all, I'm about to move to Newport for a new career. I've been slowly learning astrophotography over the past few years, and would like to continue learning with fellow amateur astronomers. Do you all meet semi-regularly, or are there established societies you can recommend? Thanks in advance.
  5. I'm starting to transition into mono CCD imaging. I'm after CCD grade LRGB (and narrowband budget permitting) 36mm or 2" filters set (from the leading brands: Astronomik, Baader, Astrodon etc). PM if you're looking to sell.
  6. This made me smile, typical Norwegian good manners - like the Trafalgar Square Christmas tree.
  7. I'll phone StarTech in the slim hope they can send me a circuit diagram... In the meantime, can anyone tell me how I can tell what spec' the aforementioned Zener diode is? I can then replace it with a new one, to see if that fixes it. Thanks for your help.
  8. I should have said at outset: I am a physicist by training, not an electrical engineer, so although I know the fundamentals, but will need clarification with the jargon and methods The plot thickens. tested the lone capacitor, it is ~1M Ohm and outside range in the 2 directions -> can assume it is fine after all. BUT It was covering the circled Zener diode. As the picture shows, it measures 0.3V (diode test mode) *both* directions. It also appears cracked on the outer tube. I measured a neighbouring Zener as shown for comparison. Is this the culprit?!
  9. @pete_l@symmetal Thanks chaps for your input. After some reading up on remedial DC testing, I have confirmed that that diode seems fine, as with a nearby diode. *However* the left most electrolytic capacitor in photo 2, is showing 0.3V in both directions - showing a short? I'll now remove it to confirm this. Assuming this is the fault, can either of you confirm whether I need a special brand (other than obviously matching capcitance and Volt rating)?
  10. I would strongly suggest reading through an A Level Pure maths book, to get a decent grasp of both calculus (mainly differentiation). complex numbers (in short why we have to create another layer of maths above "real" numbers to deal with sqrt(-1)... to then read first few chapters of "Introduction to Quantum Mechanics" by David Griffiths, 2nd Ed. This book is oustanding - it made second year quantum mechanics actually enjoyable...! My summary of QM: classical mechanics can describe any speed/weight/size car driving around a bend. Whereas when zooing into the atomic level, "Quantum mechanics" dictates that the scaled down car can only exist in certain lanes of said bend, travelling at correspodingly discrete speeds. "Quantum" literally means quantised mechanics (think UK shoe sizes; there is no size 10.368247586 shoe, only discrete values). Only quantum mechanics can explain why an electron can exist in stable atoms, by possessing quantised amounts of energye. Also how semiconductors behave - why certain dopants added to silicon make a CCD camera more sensitive for a certain wavelength. This stuff is counter-inutitive with our macroscopic pre-conceptions... and I believe this gives it is this (undeserved) mysterious reputation. Be persistent, this stuff is 'hard' for a reason, and interest is the only prerequisite!
  11. I was happily using a 4 USB to ethernet adapter at my astrophotography rig for a while. Until one night, for no apparent reason, the adapter would not power on upon plugging in. The symptoms: 1) I was using a cheap 12->5V buck converter to power it. After plugging in, the buck makes a very faint whine. I’ve been told this means its inductor has failed (change in resonant frequency). 2) Having replaced the buck with a better and higher rated one, I notice its supply voltage change from 5.1 to 1.6V (according to built in voltage display) when plugged in. Must be a fault with the adapter... 3) whilst inspecting tye PCB while plugged, the back gets noticeably hot within few seconds. See photos circled red. NB. smaller PCB sandwiches above larger PCB via the 10 header pins. That black chip thing circled would appear to be the source of the heat. for the sake of a burnt component or so, I’m loath to throw out a £100 device! Any help in diagnosis will be much appreciated. Edit: I don't know where to start in identifying the faulty PCB component with multimeter etc.
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