Our latest Tech Night became a Tech Day this past weekend. We got together on Saturday afternoon to build another kit – the DSO138 Oscilloscope. We had a great turnout with over 15 kit builders and helpers present.
Brian, AB1ZO choose this really cool kit for us to build. Here are some specifications for the finished DSO138 Oscilloscope kit:
Analog bandwidth: 0 – 200KHz
Sampling rate: 1Msps max
Sensitivity: 10mV/Div – 5V/Div
Sensitivity error: < 5%
Vertical resolution: 12-bit
Timebase: 10us/Div – 50s/Div
Record length: 1024 points
Built-in 1KHz/3.3V test signal
Waveform frozen (HOLD) function available
The kit came with all Surface Mount parts pre-installed.
The kit included a very nice case to finish off the project. This was a pretty big project to complete in a single afternoon but quite a few of our builders completed their kits and got them working!
The gallery below contains more pictures from our kit build. Everyone was very focused on the building process as we all wanted to get our kits to work in the time we had together.
I wanted to share some tips to follow for our 18 Feb Kit Build from 1-4pm. As I already built my own kit, I wanted to share some advice.
I know not all of you can attend, but for those of you who can, please read below. I’ll also post on website along with some pics.
Make sure you bring a magnifying glass AND a multimeter. Also might help to bring an LC meter too (though I didn’t have one at the time) The color bands on the resistors are particularly impossible to see, so I had to measure the resistance of every one. I even did it 2-3 times to make sure I was right.
To test your kit at the end of the night, you need to supply it with power. You can do this 2 different ways. The first is bringing a 9V battery along with 9V battery leads terminating at the end of a female port as shown below. The second, is grabbing a power adapter rated for no higher than 12 V again terminating on a female port with pic show below.
You might want to bring a small Phillips head screwdriver (for eye glasses) in order to perform probe calibration.
If you want, bring your laptop so you can download some signal generators (using your sound card) in order to play with the oscilloscope. In order to do this, I ended up using a BNC to audio adaptor which I purchased off of Amazon Prime. I’ll bring mine in case you don’t have one
If you have a standalone signal generator, please bring it, along with BNC wire connections for the oscope.
In order to do some testing, we are going to want to use either signal generators that club members graciously bring in, or you can use your laptop’s sound card. To that end, Mike (K1WVO) suggested a really nice link to do this.
On Saturday, January 28th the Nashua Area Radio Club (Nashua ARC) will be hosting a special event for Interested kids, parents, and friends in the community about the joy of amateur radio at MakeIt Labs in Nashua from 9:00 am – 3:00 pm. You may drop in at any time and stay as long as you like to participate! Among our activities, you can:
Get-On-The-Air Station (GOTA)
This is amateur radio at its best and what it’s known for! We invite you to get on the air and make a contact (we call them QSO’s — pronounced: cue-so) somewhere in the world! You might be able to make a new friend in Germany or even Japan! Making contacts sits at the heart of amateur radio and is an activity that brings people together. So don’t be shy, step up, and hit the push-to-talk button!
Satellite Station Display
The Radio Amateur Satellite Corporation (AMSAT) began in 1969 to foster amateur radio participation in space research and communication. Currently, AMSAT groups help advance the state of the art in space science, space education, and space technology. Come learn about what components go into constructing a station capable of contacting a satellite and what antennas, and smart phone apps, operators use to keep a pulse on the satellite location.
Digital Amateur Television (DATV)
Not only are amateur radio operators granted privileges to transmit speech, but we also can send fast-scan data such as TV signals! Many operators have experimented with how to homebrew their own fast-scan TV stations, and our club president Fred (AB1OC) and our member Skip (K1NKR) have chosen to use construct a station which uses a Raspberry Pi (RPi) with an Arduino shield to sit at the heart of the transceiver. The RPi is the brains of the TV which runs Linux and among other things is responsible for sequencing, transmit / receive control, automatic VSWR monitoring, and a touch-screen controlling interface to configure and operate the system. Learn about what it takes to build and operate one of these stations. We may even be able to make a contact! More information can be found at https://stationproject.wordpress.com/category/amateur-television/.
Kit Building with Nashua ARC
The Nashua ARC holds kit-building nights where both inexperienced and experienced members homebrew in a relaxed, learning environment. In the past we have built Pixie QRP (low-wattage) kits transmitting Morse Code on the 40m amateur band. But, on February 18 from 1 – 5pm, First Church in Nashua, Nauss Hall, we will build the digital oscilloscope kit DSO138 (shown to left). This kit comes with a clear acrylic case to protect it, build instructions, and among its specs has a 1 Msps sampling rate, 12 bit accuracy, 200 kHz bandwidth (good for audio signals), capable of freezing the waveform display, and comes with a 1Hz / 3.3V test source. We invite you to join us and will bring some kits with us. More info can be found on our website at http://n1fd.org/2016/03/27/inexpensive-diy-digital-oscilloscope-kit/.
We hope you will join us for our event! Please bring friends, family, but most importantly we want you to have fun and enjoy this hobby with us!!
Our club has accomplished a great deal in the last year. We have grown to over 130 members. We have introduced many new people to Amateur Radio, helped them to earn their Licenses and worked with them to get on the air and develop their knowledge and operating skills. We’ve also worked hard to provide opportunities to enjoy and learn about Amateur Radio for members of our club and for the Amateur Radio community which we are a part of.
Much of the credit for our club’s success this past year belongs to you, our members. We very much appreciate all that you have done to contribute to our success and the fun that we have all had as part of what we have done together. Your enthusiasm and support provides great encouragement and inspiration to the many new members who have joined us as well as to all of us who are part of our club’s Leadership Team.
We, as your club’s Executive Committee, have been working on a set of goals and plans to continue on this path during 2017 – to provide even better opportunities for our members to learn more about and to enjoy Amateur Radio, to continue to encourage people to join the Amateur Radio Service, and to provide opportunities for STEM learning for young people.
Our goals and focus for 2017 centers around continued success in and focus on the following areas to benefit both our members and our community as a whole:
To do these things and to be successful as a growing club, we are also pursuing status as a 501(c)(3) non-profit. This will enable our club to more effectively secure support from other groups to further our work towards these goals.
Each of us has taken ownership for creating a focus on meeting different aspects of our goals for this year. We are planning to share more about our plans for 2017 at our February Club Meeting.
We are asking that each of you, as members, to consider how you can get the most from all of these and the other opportunities that our club provides. We are working hard to try to create something for everyone that can provide enjoyable opportunities to have fun, to contribute, and to expand the value that we all create and derive by being part of the Amateur Radio Service. We are also asking each of you, our members, to consider helping us with these initiatives in 2017.