Building a Telescope Tripod dolly (Meade LX-200 12″)

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I built my own Tripod Dolly with casters & Leveling bolts (out of 2×4’s and plywood) for my Meade LX-200 12″ with Giant Field Tripod (the one with the 3″ diameter legs).

I was originally thinking it would be just so I could play around with the telescope (move it in and out of the garage) and get a feel for things until I decided what commercial dolly / truck / cart to buy, but I’ve been so happy with the results that I think I’ll just use it permanently.

Tripod Dolly built from 2x4s and plywood

 

I’ve got a short 5 minute intro video here (which links to a full 40 minute how to build step by step video if you decide to follow along and build your own):

Also of potential interest to people with the Meade Giant Field Tripod is that I modeled the tip of the tripod legs and designed a 3D printed bracket for holding the tripod tips securely in place on the 2×4’s…[Of course, you could just drill a 1″ hole at a 55 degree angle, but if you’ve got a 3D printer everything needs a custom bracket….]

You can find the 3D model & OpenSCAD design file on Thingiverse here: https://www.thingiverse.com/thing:6826864

 

Google Pixel 5A screen flashing “colored snow” – Recovering the photos.

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Pixel 5a phone showing the USB Preferences screenGoogle pixel 5a showing the "colored snow" pattern

My wife’s Google Pixel 5a phone suddenly developed a hardware fault that presents as a “colored snow” screen flashing over the entire phone display. While the “colored snow” pattern is on the screen, the phone does not respond to touch events.

However, when the colored snow pattern is NOT showing, the phone display goes back to showing what it should be showing, and it will accept touch events.

The difficulty is that the speed of flashing is very fast (on the order of 0.5 seconds) so it is difficult to read the screen and push buttons or UI areas effectively to do anything.

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Upgrading the firmware on a Meade LX-200 AutoStar II system

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I recently purchased a used Meade LX-200 telescope, which uses an AutoStar II handbox.  Unlike the  Meade #497 AutoStar controller used on my ETX-125 telescope the LX-200 uses a 6 pin plug for the RS-232 port, and it’s located on the main box, not on the handbox. So if you have a Meade #505 cable (4 pin) it won’t fit correctly. I purchased a Meade #507 cable, which is electrically the same (a RS232 to USB connector) but has the proper 6 pin (larger) plug for the LX200 GPS RS-232 ports.
[Having this cable will also let me control the telescope via software on my computer if I want, so I think it was worth the $20.]


It already had the latest 4.2g (note the lowercase g) firmware from Mead installed (which is good, as Mead is now out of business).  However, I used the starpatch software along with the PatchLX42ggv22.spf and BuildLX4.2g.rom files from the very helpful StarGPS company to patch the 4.2g firmware with a few bug fixes, including the GPS date rollover fix.  [They are very generous in that the trial version of their software will patch all the bugs, although if you want to use it to add in support for a GPS receive to a telescope that doesn’t normally come with it like my LX-200 GPS does, then you have to buy the license key.]


This process took me a full hour of downloading time, because I set the speed to the lowest 9600 baud to give it the best chance of being successful on the first shot. (I ran into issues with my previous firmware upgrade of the #497 handset that was fixed by using 9600 bps.) When it was done, I had the  4.2G (note the uppercase G) firmware installed with patches.  This also enabled the “Smart Mount Technology” option from Meade, which is nice to have available, even if you don’t use it.

Review: FUNCRECOL Light Curing UV Putty

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FUNCRECOL Light Curing Putty comes in a metal tin with a screw top that contains 50 grams (1.76oz) of UV reactive putty. The package also includes a “scraper” tool, useful to pull putty out of the can, or smear it onto objects or cracks.

I used this putty to fill in a crack in a miniature figurine left behind when mating two parts together. The scraper tool was useful to push the putty into the crack, and I used a finger (protected by a vinyl glove) to smooth things out.

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“Bus Nàutic” – Barcelona’s solar powered EV harbor ferry (& inexpensive short harbor tour option)

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Starting July 4th 2024, Barcelona has opened a 10-15 minute long cross harbor catamaran ferry that goes from Moll de les Drassanes (Near the Columbus monument) across the harbor to Moll de Llevant (Near the W hotel).  One way tickets are 1.90 Euro for adults, and open round trip tickets cost 2.85 euro.

From 7am-10am, you can pay for the tickets on-board, as the ticket agent booth at Moll de les Drassanes does not open until 10am. [The Moll de Llevant station on the other side has an automated ticket vending machine and a public restroom, but is not always staffed.]

There are two solar/battery powered catamaran ferries (don’t worry about cloudy days, they have enough on-board battery power to run all day without the sun) that make the trip every 15 to 30 minutes. The smaller (and more colorful) ferry holds 56 passengers, while the larger ferry has rooftop seating and can hold up to 84 passengers.  [Sometimes the larger ferry does not operate if the demand is low.]

This 10 minute ferry trip gives you good views and photo opportunities for the America’s cup moorings, superyacht service station, views towards the commercial port and cruse ship berths, and views up to Montjuïc Castle and the overhead cable car line leading to the port cable car station.

The 40 minute “Golondrinas” ferry tour goes quite a bit farther in both directions, and only costs 8 euros, but if you are on a tight budget, have small children who may not want to spend 40 minutes on a ferry, or need to make the crossing from the W hotel to Las Ramblas anyways, the electric ferry is a great option to see a good sampling of what the harbor tour offers.

You can sometimes also see migrating jelly fish in the water, which can potentially be a danger to swimmers along the beaches.

The ferry shuttles run for 12 hours out of the day, so if you stay late at San Sebastià beach you may need to take the TMB V15/V19 bus and walk back along Pg. de Colom (or transfer to the D20) to return to the Colombus monument area.  [There are always a lot of Taxis waiting at the W hotel as well…]

Cable(s) needed to connect a Sony A6300 to a DJI Ronin (4/3/2) stabilizing gimbal

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I connected my DJI Ronin 4 to my Sony A6300 camera using a “generic” USB-C to micro-usb cable.  [This is equivalent to the DJI “Multi-Camera Control Cable (Micro-USB)” cable.]

The generic cable allowed the Ronin to start/stop video recording, and adjust the shutter speed and aperture (BUT NOT trigger the shutter to take photographs, such as in the auto-panoramic mode…)

To control the shutter, I had to use the specialized DJI Sony “Multi” cable (labeled for the Ronin 2, but it worked fine for the Ronin 4). This cable allows you to start/stop video recording, trigger the shutter to take a photo, but NOT control the shutter speed or Aperture. So depending on what is important to you, you may need to buy both cables to use a Sony A6300 with a DJI Ronin.

You can compare and contrast the differences between the two cables here:

https://www.dji.com/support/compatibility/rs-4-pro/a6300

If you are interested in knowing what cable you need for your specific camera, this page is very useful: https://www.dji.com/support/compatibility

 

 

Review: WOWCube Space Invaders Cubed edition

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WOW Cube Diagnostic mode – possibly the coolest screensaver.

This was a pre-order that I paid $249 for on 6/6/2022 [For the WowCube System Starter Pack].

In the two years since, they had shipped some cubes, had some issues, got some feedback, and went to a lot of trade shows.

Now it looks like they have taken delivery of a big batch of cubes and are starting to deliver. They “upgraded” me to the Space Invaders Cubed edition (I suspect this is the only edition they are currently producing, or have stock in.) and I paid my $19.75 shipping fee on March 3rd 2024 and it was delivered on March 8th 2024. (Yep, 21 months later….hey, at least I got it…I’m looking at you Peachy Printer, CST, and Yomee yogurt Kickstarters….)

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Teardown: KUSAYYLA 12v 7 5Ah LiFePO4 replacement battery (Possible fire hazard)

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KUSAYYLA 12v 7 5Ah LiFePO4 replacement battery (Possible fire hazard)

 

underside of the lid showing the battery voltage display with 2x USB-A ports, charging barell connector, and switch to turn off power to terminals and USB module

This “drop in” replacement for a 12v AGM battery has 12x 18650 cells in a 3 series 4 parallel configuration. The cells only had a company logo on them, and no other markings, so they *could* be LiFePO4 chemistry, but I can’t verify that one way or the other.

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Review: FunCreCol Standard White 101 photo-polymer resin for DLP/LCD 3D printing

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The FunCreCol Standard white 101 ($25)  is a low viscosity white photopolymer 3D printing resin. I used it with my Phrozen Sonic Mini 3D printer and after I added one extra second to my layer exposure times it worked beautifully. The output quality and resolution was just as good as my printer achieves with the Phrozen branded aqua ivory resin.

Exposure test print showing good details

The resulting prints were much stronger than the Aqua Ivory resin, but slightly more brittle. I suggest using the “thin” supports setting on your sliding software, as the thin supports bend and do not shatter into shards as much when you are breaking them off.

Showing fine thread detail

A 50mm tabletop gaming base with fine details

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Review: FunCreCol “Tough” 102 gray photo-polymer resin for DLP/LCD 3D printing

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The FunCreCol 102 “tough” (gray) resin produces prints with good resolution that have a little flexibility. They are not “flexible” like TPU, but do have a little “flex” and will generally bend instead of breaking. It is MUCH less brittle than the FunCreCol standard (101 – white) resin (But also costs more, and takes a bit longer to print due to the longer exposure times required).

Edge of a print deformed due to the interaction of flexible resin and thin supports

The only issue posed by the flexibility is when using light/thin supports with certain geometries, it is possible for the support structure or small parts of the print to flex and not fully pull off of the film, which can sometimes lead to distortions or “bad spots” in the print, typically focused near the small islands or near the beginning of the print. You can resolve these issues by using larger (medium/thick) supports or carefully positioning your prints to avoid small areas that would be susceptible to flexing while being pulled off of the film.

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