I’ve converted a 1.8m fixed dish to have elevation and azimuth control for use mainly on 10GHz EME (Earth-Moon-Earth, aka Moonbounce) Amateur Radio. The drive motors are SDD3 from https://sub-lunar.com Many thanks to Paul W2HRO for pre- and post- sales support. Inspiration to attempt the project was definitely helped by watching @VE6BGT and using info […]
Minimal ADALM-Pluto 10GHz Transceiver
Taking advantage of the 3rd harmonic output of the ADALM-Pluto, and a Ku-band LNB, a very simple full duplex 10GHz transceiver can be constructed. ADALM-Pluto https://www.analog.com/en/resources/e… Bullseye LNB https://othernet.is/products/bullseye… VHF-7150+ https://www.minicircuits.com/WebStore… Generic Bias-Tee https://www.amazon.com/10MHz-6GHz-Bro… SDRangel https://www.sdrangel.org Amphenol connector (aka my stub antenna…) https://www.mouser.com/ProductDetail/…
LoRa 10GHz Ham Radio
Bench experiment using LoRa transceivers on the 70cm ham band (~433 MHz) as IF radios, up and down converting to/from the 3cm (~10GHz) ham band. Inspired by work being done at Open Research Institute (https://www.openresearch.institute/) It could be really interesting to have some LoRa APRS iGate stations/beacons on at 10GHz to promote experimentation. (https://github.com/lora-aprs/LoRa_APRS_iGate)
10GHz Downconverter with Mini-Circuits blocks
The primary goal is to be able to roughly calibrate some signal sources in the 8.4GHz to 10GHz range with known calibrated equipment at lower frequencies. I have a Tektronix RSA306B Spectrum Analyzer, but a receiver with the appropriate coverage would work. Signal paths (really need a diagram!) Uncalibrated 10.5 GHz Source : 30dB Attenuator […]
Driving Straight and Turning with the MPU-6050
Make your robot drive straight (ok, well, straighter) using the MPU-6050 6-Degrees-of-Freedom accelerometer/gyro. This is another presentation given to the Nashua Robot Builders. Here’s the Arduino code: _2020Bot_MUP6050.ino.zip Please note… the Arduino code isn’t up to my usual standards, but it will show you a few things. Pay attention to the required libraries (links […]
Intel Euclid Presentation
Euclid presentation for the Nashua Robot Builders. Sorry, this is definitely one of those “you had to be there” type presentations… The feature list slides might be the only decipherable section.
Twenty 2020 Bots – Bay Area Maker Faire 2017
Phew! That was amazing! I had a blast at Bay Area Maker Faire building 2020 Bots all day Saturday and Sunday. Once an hour, a couple attendees got a chance to build their own 2020 Bot and take it home with them.
2020 Bot Motor Control Examples
I just updated the 2020 Bot Arduino Library to include a couple motor control examples: https://github.com/robojay/_2020Bot_Library One uses the delay() function between motions. This is great for ease of understanding, but not so great to use in practice. The delay() function blocks the robot from doing most other tasks until the time expires. The second example […]
IR Proximity Sensing
When you build a robot, it’s nice to have layers of sensors. You can think of the layers either top down (maybe starting with a 3D laser scanner), or from the bottom up (are my motors stalled?). Proximity sensing sits on one of the lower layers, and generally is used as “Hey, there’s something near […]
Programming the 2020 Bot
Once you’ve built your 2020 Bot and played around with it a bit, the next step is writing your own programs. The 2020 Bot uses an Arduino Nano micro controller. A simple web search will turn up plenty of references. Here’s a good link to get you started: Official Nano Getting Started guide from Arduino: https://www.arduino.cc/en/Guide/ArduinoNano