FAR Circuits is now making available an assembled and tested board for the Bluetooth Digital Setting Circles project. The board includes a preprogrammed PIC16F628A chip as well as a fully-configured RN-42 Bluetooth module. You’ll still need to solder a connector for your power source of choice, and you’ll need to obtain your own rotary encoders and connect them through the RJ-45 port included on the board.
If you’ve been geeking out for a couple decades, chances are you at least saw the Radio Shack ProbeScope at some point in time.
I bought one back in the late ’90s and found it to be fairly handy for a number of things. Its sampling rate, as I recall, was 4MHz, meaning you could use it to at least detect the presence of RF in a circuit. I also used it to help me debug the code I wrote to emulate serial communications in the microcontroller for my Digital Setting Circles project.
The ProbeScope included a floppy disk with software on it for both DOS and Windows that allowed you to view the waveforms on your PC by connecting the ProbeScope to the PC’s serial port. Alas, the software was written back in the 16-bit days and won’t run on the 64-bit operating systems on most modern PCs. Plus, who has a floppy drive to read that disk anymore? But if you’ve read any of my other blog posts, you know I have a habit of finding ways to revive old but still useful technology that’s long since been left behind.
This is a little tidbit I stumbled across while reading KE7X’s “The Elecraft KX3 – Portable” manual. I was interested in adding a PTT switch of some sort to go with the lightweight computer headset I intended to use for portable operation with my Elecraft KX3. It’s possible to use the XMIT button on the front panel for PTT, but I wanted something a little more convenient.
A KX3 menu setting, a simple momentary SPST pushbutton switch, and a repurposed ballpoint pen housing ended up doing the trick. I think the picture below is worth a thousand words:
Thanks to some help and testing from Pete Eschman, I’ve been able to restore support for Orion telescopes to my ASCOM Driver for Digital Setting Circles. Specifically, Orion Sky Wizard 2 and 3 and Orion Intelliscope platforms should now be working. Please let me know if you have problems using the driver with these platforms.
Orion itself gets no credit for this–they repeatedly ignored my requests for technical support on this issue, despite the fact that the ASCOM driver they published was a slightly-modified version of one of my earlier drivers.
Here’s an image I took with my NexStar 6SE and Canon EOS Digital Rebel XT DSLR of the total lunar eclipse on the evening of 27 Sept 2015, just after the eclipse reached totality. The image was taken with the DSLR mounted at the prime focus of the NexStar 6SE. This is a 1500-mm f/10 setup, with the camera set at ISO 400, 15-sec exposure. Unfortunately, with the long focal length I couldn’t quite fit the entire moon in the frame.
So, you probably saw the post I put up a day or two ago about having just gotten a Celestron NexStar 6SE telescope. I’ve been having a ball with it so far. My plan last night was to try using my digital camera to take some video of Jupiter and then run it through Registax software to see what came out of it. I followed the instructions posted on this page at Stargazer’s Lounge. I can’t claim to have done anything original here–just followed the cookbook.
Who among the backpacking crowd hasn’t wished for a more manageable way to carry a decent camera on the trail? I carried a little pocket digital camera for many years but was never really happy with the pictures I was getting. I really longed for a better quality camera–one with decent optics, versatile optical zoom, capable of taking pictures under various lighting conditions, etc. But it’s a challenge to carry anything bigger than a pocket-sized camera on the trail. Where do you put it so it’s not either always in your hands or bouncing against you at the end of its strap? Continue reading →