Open Source Telescope Control

board

Telescope mounts connected to computers and stepper motors have been available to the amateur astronomer for a long time, and for good reason, too. With just the press of a button, any telescope can pan over to the outer planets, nebula, or comets. Even if a goto command isn’t your thing, a simple clock drive is a wonderful thing to have. As with any piece of professional equipment, hackers will want to make their own version, and thus the openDrive project was born. It’s a project to make an open source telescope controller.

Right now, the project is modular, with power supply boards, a display board, motor driver, an IO board (for dew heaters and the like), and a hand-held controller. There’s an openDrive forum that’s fairly active covering both hardware and software. If you’re looking for a project to help you peer into the heavens, this is the one for you. If telescope upgrades aren’t enough to quench your astronomical thirst you could go full out with a backyard observatory build.

Danke [Håken] for the tip.

DIY PC to telescope interface cable

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If you’re serious about astronomy these days, you want to have a computer controlled telescope. Although you can easily purchase a pre-made cable that connects the two devices, where’s the fun in that? [Charles], being an avid Maker, has created a nice step by step guide so you can build your own.

This is a great weekend project, and one that even a novice electronics hobbyist should be able to tackle. It’s straight forward, rather quick, and very easy. Strip some insulation off both ends of the cable, then cut off the unneeded wires. (You’ll only be working with three of them.) Prep everything with heat shrink tubing. Crimp one end of the wires into an RJ10 plug, then solder the other end of the wires into a DB9 connector. Secure the heat shrink tubing in place, attach the housings, and you can call it finished!

[Charles] said the whole procedure only took him around 15 minutes. Total cost? Less than $17 in parts.

Print your own adjustable lenses

3d-printed-eyeglass-lenses[Christopher] is really going the distance with his liquid-filled 3D printed lens project. The idea is to create a bladder out of two pieces of clear plastic. It can then be filled with liquid at a variable level of pressure to curve the plastic and create an adjustable lens. He was inspired by the TED talk (which we swear we already covered but couldn’t find the post) given by [Josh Silver] on adjustable eyeglass lenses.

Don’t miss the video after the break. [Christopher] shows off the assembly process for one lens. Two 3D printed frames are pressure fit together to hold one piece of plastic wrap. Two of those assemblies are then joined with JB weld and some 3D printed clips that help to hold it. A piece of shrink tubing is used as a hose to connect a syringe to the bladder. By filling the lens assembly with water he’s able to adjust how it refracts light.

[Read more...]

Simple iPhone telescope mount

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This cheap and easy hack will let you use your old smart phone to take pictures and videos of the view through a telescope. [Xobmo] built the connector for just 55 cents. Apart from our concerns about scratching the lens when inserting the phone in the bracket we love the idea.

He was given the Celestron Powerseeker 70AZ as a gift from his wife last Christmas. He looked around the Internet and saw that there are already some solutions for recording video using an iPhone 3GS. This design on Thingiverse would be perfect, but he doesn’t have access to a 3D printer and ordering it form a service would cost almost $50. But when he got to thinking about it, all he needed was a ring to fit on the telescope and a way to connected the iPhone to it. He headed down to the hardware store and picked up a PVC coupler. After working with a hack saw and drill he ended up with a slot with two wings on it. Just slip the phone in and slide the ring on the eyepiece. You can see some action shots, and get a look at the mount itself, in the clip after the break.

[Read more...]

Another great backyard observatory build

With a little help from their friends [Jeff Fisher] and his dad built this observatory in their back yard. Their use of simple building materials and techniques show that you can create a respectable home observatory without breaking the bank.

It starts with a footing for the telescope mount. This is completely separated from the building that surrounds it so there will be no issue with vibrations affecting the images it is capturing. From there a foundation made of cinder blocks was laid before placing joists and installing a sub floor. It was during this process that they trenched and placed conduit to run power to the building. With the floor in place the walls were stick built and a carefully crafted dome was assembled and hefted in place by this septet of gentlemen.

Four months was all it took to get to this point, but [Jeff] and his dad are still working on a deck to go around the observatory. They’re using a very nice telescope that they purchased, but it is also possible to build one of those yourself.

[via Reddit]

Father/son team goes big with backyard observatory

Oh that? It’s just the backyard observatory we built last summer. You know, for fun. This is a conversation we image [Kakon24] and his dad are having quite often these days. They’re astronomy interests just got a big equipment upgrade when they built a huge observatory on their homestead. Now we don’t proclaim to know a lot about observatory quality, but this is head and shoulders above what most people manage to acquire.

It isn’t a simple build either. It’s a full-fledged building of its own, starting with a poured foundation, then stick framing which was covered in stone work. The images tell the story of the build, but for information on the hardware you’ll want to read through the comments over on the Reddit Astronomy thread. Sounds like the scope itself cost over 100 grand so having a proper building to protect it is a must.

Building a radio telescope for a school science project

The image above is a picture of  Hydrogen emissions from our galaxy. The cool thing about this picture is it wasn’t taken with millions of dollars worth of equipment; instead, only a few hundred dollars worth of ham radio gear was needed to get a picture of the Milky Way. [Shanni Prutchi], with the help of her dad [David] built this radio telescope in 5th grade, and even gave a presentation on this build at the National Radio Astronomy Observatory.

Instead of a gigantic satellite dish, [Shanni] used a loop yagi antenna to collect radio signals in the 1420 MHz band. These signals are amplified, filtered, and sent to an ICOM IC R-7000 receiver specially modified by [Shanni]‘s dad for radio astronomy.

After her telescope saw first light, [Shanni] and [David] decided to use their brand new toy to detect the passage of the sun. At around 10:00 am they pointed the telescope at where the sun would be at 1:30 pm. For the next few hours, the telescope gathered and integrated radio signals to make an awesome graph. Yep, [Shanni]‘s scope can detect radio waves coming directly from the sun.

Like a lot of us, [Shanni] was very much influenced by the movie Contact, something we brought up last week in a post on software-defined radio telescopes. This telescope was built in 2005, meaning [Shanni] couldn’t take advantage of any of the new advances in cheap software radios. We’re still waiting for someone to throw a Realtek SDR telescope together, so if you’ve got one send it in