Next step in building the radio is to prepare to interface with the ADC (LTC2314-14) which is sending the samples in serial stream very much like SPI but has timing requirements in order to trigger the conversion and give sufficient time to complete the conversion. The datasheet is showing three timing diagrams two are pushing the timing to the limits and the third is more relaxed and easier to implement. The whole conversion cycle is taking 20 clk cycles, 16 cycles to transf

In order to make experiments we need to be able to hear the audio and I found a PMOD module in one of my boxes which fits perfectly my FPGA board. The module is question is pictured below PMOD AMP3 link to the manual https://digilent.com/reference/pmod/pmodamp3/reference-manual This module is using a I2S digital interface and master clock (MCLK) from the FPGA and can be used with i2C control or standalone (jumpers) I'm using without I2C for the time being in default settings

USB Keyboard I got some spare time and I mapped the USB keyboard keys to map correctly* to the C64, you can write programs in BASIC like...

Last year I made a Sinclair Spectrum from scratch on the S7 Retro Board (actually was on a Zed Board which is out of reach for many hobby...

Below is a full project and Youtube video on how to design a shift register and display the state of the bits on the 8 LEDs on the board....

This article is about the first and very rough at the edges implementation of the Sinclair Spectrum on the Retro Board that I built. This...

This video is about how I started the Sinclair Spectrum one FPGA and is describing the project creation how I added the files and quick...

This is video where I'm describing how to use the DDS (Direct Digital Synthesis) as a frequency modulator by changing the phase...

In this video is presented an idea on how to visualize in frequency domain and real time a signal from inside of the FPGA on an external...

As a perfect beginner is a big challenge to take on this one without having a minimum set of skills and must haves. I'm enumerating them...