60 Results for "rtl-sdr"

Identifying the components
Log from Repurposing an old nixie thermometer
So, time to identify what I have to work with. First the nixies. I had forgotten but there are only 5 numeric nixies, the rightmost 5, which are type ZM1000. The leftmost nixie is a symbol nixie ZM1001 which can display X, Y, Z, +, - and the sine wave...

Hack Chat Transcript, Part 2
Log from DIY Radio Telescopes Hack Chat
James Aguirre12:17 PM@0xCoto that's great stuff! Canadian Centre for Experimental Radio Astronomy12:17 PM@Dan Twedt my first paper on SDR radio astronomy was about SETI back in 2004. Dan Twedt12:18 PMThat's awesome! A good magnet to the hobby! 0xCoto12:18...

Exit MIG, Enter LiteDRAM.
Log from BoxLambda
LiteDRAM in the BoxLambda Architecture. Initially, the plan was to use Xilinx’s MIG (Memory Interface Generator) to generate a DDR Memory Controller for Boxlambda. At the time, that was (and maybe still is) the consensus online when I was looking for...

Generalised fault injection
Log from VHDL library for gate-level verification
Christos has modified the original DFF gates to inject faults and evaluate/validate the fault-tolerant memory cells used by the CERN. Meanwhile, I created this library to help with ASIC design, which is a different beast and methodology. I have no bit-flip...

Hack Chat Transcript, Part 2
Log from Keeping Ham Radio Relevant Hack Chat
KI6NAZ Josh12:14 PM@Martin Mortensen There are many texting type of modes in ham radio, both VHF/UHF like we get access as technicians and HF where we can make longer distances contacts. One that comes to mind is APRS. Which can send multiple types...

Hack Chat Transcript, Page 1
Log from DIY Picosatellites Hack Chat
Dan Maloney12:00 PMOK, let's talk satellites! I'm Dan, I'll be modding today along with Dusan for Nathaniel Evry from Quub, Inc as we talk DIY PIcosatellites. Apologies in advance for my wonky keyboard with the stuck spacebar, BTW hkurz12:00 PMhi Dan...

Satellite CyberSecurity / POC Rouge Ground Station (Recon Only Unless Permission Given)
Log from Cyberdeck for 2024 Challenge
So my cyber deck can or will take the form of three different sizes it depends on how I end up actually choosing to make it more or less portable if I make it in the larger one it would have potentially room to carry all the antennas and stuff but that...

Hack Chat Transcript, Part 2
Log from Weird World of Microwaves Hack Chat
James Finch12:34 PMRainbow Photonics AG is who I am thinking of. David Troetschel12:35 PM@James Finch oh, this looks cool! James Finch12:35 PMW-Band is interesting. The Signal Path12:35 PM@David Troetschel (Power Factor (loss Tangent) @15°C: 0.0001...

Digital Transistors
Log from Evaluating Transistors for Bipolar Logic (RTL)
Digital transistors look extremely appealing to build discrete logic: They come with integrated resistors so the bias emitter in an RTL gate can be omitted. Furthermore, they are available from many manufacturers in basically any package type, down to...

CSTroN – Monitor powered by an ancient CSTN screen
Log from CSTroN - CSTN LCD monitor
Introduction Back in the last century, when the CRT was still the most common technology for computer monitors. It was quite common to see such an argument: the LCD will probably evolve and produce better images, but it is never going to replace the...

Generalised fault injection - part deux
Log from VHDL library for gate-level verification
The idea progresses while I gather the necessary ingredients for the new version of the library. At this moment I consider getting rid of all the C and VHPI code because VHDL already contains all the required features, I think. Let's start with the fundamental...

Motivation for an IQ detector in the ultrasonic Fabry-Perot
Log from Standing waves of sound
Reading Ronald Quan's nice book 'Build your own transistor radios' inspired me to improve the detection circuitry on the ultrasonic Fabry-Perot (UFP). My first experiments had diode-detected the amplitude of the transmitted ultrasound signal through...

XOR Gates
Log from LCPU - A CPU in LED-Transistor-Logic (LTL)
As a next step we will look into options to design XOR2 gates in LTL. A straightforward approach is to build a XOR2 gate from 4 NAND gates. This is simple and robust, but results in a propagation delay of three NAND2 equivalent. Not perfect for fast...

Validating Actual Hardware
Log from NE555 Dice Inversion
The PCB in all its glory Validation First step is to test the clock generation. The scope image below shows how the CD4017 generates the nonoverlapping two phase clock (clk and clk_n) from the input clock signal. It appears that the CD4017 is able to...

Hello Debugger!
Log from BoxLambda
Recap Here’s a summary of the current state of BoxLambda. We currently have: A test build consisting of an Ibex RISCV core, a Wishbone shared bus, internal memory, a timer, two GPIO ports, and a UART core.A simple Hello World and LED toggling test program...

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