I’m interested in building a Raspberry Pi based radio astronomy telescope. I’m not too set on any particular science objectives, but rather just want to get some experience with the full system, learn some about radio waves, and have some fun tinkering.
I see some various guides online such as:
But most of these guides are somewhat outdated or using relatively expensive hardware. I’m hoping to either use an old dish TV antenna or build my own from affordable components and then have an RTLSDR and Raspberry Pi form the main electronics parts of the system.
Any thoughts would be much appreciated!
Well, I think the home made cheapie radio astronomy telescopes described in the articles you referred are the cheapest toys you can find. What Rpi can help is at the final output stage, doing the ADC and DigiPot jobs as shown in the following picture:
You can find dirt cheap 10/12/16/24 bit low noise ADC and POT modules from AliExpress or Amazon. What Rpi can do more is time stamped data logging, stored in files for real time offline data analysis or AI pattern recognition and talking to aliens in the Galaxy/Universe, …
For a feasibility, you don’t need 9 bit accuracy, I would recommend the US$1 cheap guy – 8 bit PCF8591 ADC/DAC module which can do both ADC and POT. There is even on board a Sun light sensitive resistor to emulate the Sun!