Or Serial Data Register. Even though it may be not very well known, it was meant to provide fast disk drive access on the Commodore 64 and Commodore 128. But for classical Commodore reasons, we were stuck with the old and slow bitbanging IEC...
It would be so cool to test immediatly with real hardware, but sometimes simulation can also show a lot. The use of weaver for SDR CW demodulation should be very simple, but let see:Created in no time, SDR simulation with Delphi and Mitov Signal Lab....
This SDR could be used as general purpose SDR as well, but I am designing as ARDF 80m direction finding receiver. Concept for SDR Base: 2 Channel ADC, 16bit, 20+MSPSZynq 7010-CLG225 with SPI Boot FlashThats basically it - well it has also be lowest power,...
As I continue to search for a SDR software that is capable, light on processing, and easy to customize, I came across this excellent work by Paul. Paul has built ESP32 based controllers, and built custom software for SDR, with nice GUI. Paul's...
It's been a long time I put something here and my promise for this year is to be more active. I have been working quietly on the Chips4Makers low-volume manufacturer flow. My most recent success is to have replaced the proprietary Verific plugin for...
I decided to add an ESP32 to take input from the keypad, 5 buttons and the 2 rotary knobs. It would also control the single color OLED in the top of the case as well as a planned external color LCD (currently not installed). The idea is to allow the...
I had some great feedback with Hackaday members. There was recommendation for GNU Radio. So, I wanted to do a further detailed analysis on what are the options, and pros and cons of using the software options. GNU Radio Companion (GRC) Pros:Extremely...
The goal of this task is to actually make the digital implementation work. Forget Mr. Fields So, I had a go at the why the previous circuit was not working, and I found out it was just messed up in so many dimensions it's hard to name them. In the end,...
So, we established that the PMBT2369 is the fastest saturation-switching transistor available today and that it achieves a minimum propagation delay of 3.5 ns at a bias current level of 10 mA. How can we go further from there? Obviously, more brute forcing...
How to calibrate your SDR aka what’s my frequency? Note: Merry Christmas 2020, everyone! This is a mini how-to that will evolve during the holiday season. Have fun, come back, leave me a comment or tweet. The calibrated SDRs… tl;dr: If...
I've been making some progress in re-building what I am now calling the Junk Box SDR. As I mentioned the other day, I have built a small 5v power supply. I have since added another zener diode on the 5v side to protect that side of the supply (from what...
Still struggling with this cell phone signal booster project. In theory the LimeSDR should now work, but my phone does not respond. It's hard to know what's going on without a second LimeSDR to use as a spectrometer :( I'll be working more on the hardware...
I am building a custom controller using a Raspberry Pi Pico paired with an ADS1115 analog-to-digital converter. In this guide, I will walk you through the process of connecting three linear potentiometers, a potentiometer with an on/off switch,...
To get started, I purchased an RTL-SDR dongle and antenna kit from Amazon. This came with the dongle, an antenna, and some equipment for connecting the two. The kit came in a couple of business days. More information about the dongle can be found on...