April 22, 2013 in Uncategorized
Bears on Patrol provides teddy bears and stuffed animals for police to give to children in traumatic situations.
We have provided bears for the MBTA Transit Police in the past. As you know, they have been involved in the hunt for the bombing suspects and one of their officers was seriously wounded. Please remember them and donate if you can, and share this post if you can’t.
You can donate on the MBTA Transit Police donation page, or on the main Bears on Patrol page.
April 2, 2013 in Uncategorized
I have created a Facebook page for this blog. It will most likely just post links to the new blog posts here, but we’ll see what happens. I think it’s a good way to get more visibility. You can find the new page here.
This post is also to test the plugin that should automatically post the link on Facebook.
March 23, 2013 in High Altitude Balloons
I am excitedly, and somewhat impatiently, waiting for the jet stream to calm down so we can launch our next high altitude balloon. That’s because we will have lots of new electronics and sensors on board, and I am eager to see how they perform. Here’s a look at what we have.
- Arduino Uno - Quite literally, this will be the “brains behind the operation”. This little microcontroller has so many potential uses and applications on our flights. It will be controlling the data logger, sensor, and the other module described below. (product link)
- MAX31855 Thermocouple Amplifier (and thermocouple braid) - Capable of measuring temperatures as cold as -200º C (-328º F), this is perfect for a trip to the stratosphere. The temperature data will be logged using the data logger described later. (product link)
- ADXL326 Triple-axis Accelerometer (+-16g) - This will also be controlled by the Arduino and logged by the data logger. It will be interesting to see the tilt angles during the flight and the G forces after the balloon bursts. (product link)
- Emic 2 Text-to-Speech module - This module converts a stream of digital text into speech. It will be fed our balloon’s altitude and GPS location and will then speak that information over our amateur radio simplex repeater. (product link)
- GPS Logger Shield - This module will log temperature, accelerometer, and GPS data to an SD card. This will allow us to get detailed and interesting information about the temperature and how the capsule was moving all through the flight. (product link)
- T3-301 5-Watt VHF Transceiver with Integrated Tracker3 - The T3-301 from Argent Data Systems is an APRS tracker with an integrated 5 watt radio. It helps us save on weight, and includes features like profile switching for various altitudes and a scripting engine. (product link)
- ADS-SR1 Simplex Repeater - This simplex repeater from Argent Data Systems records incoming transmissions and plays them back on the same frequency. This will allow our recovery team to talk to each other through the balloon as we drive to chase and recover it. (product link)
- SRB MX145 Transmitter - This will be a lightweight and low power option to connect to the simplex repeater. (product link)
February 24, 2013 in Uncategorized
Welcome to the new community I just set up on this site. This is for anyone who is interested in any aspects of amateur radio or technology.
February 20, 2013 in Uncategorized
Just adding a quick post here after I’ve reinstalled the blog. Both of my websites have been hacked and now fixed, and I’m trying to convince Google to stop listing us as a harmful website.