Tcl Script Cheatsheet
Tcl (Tool command language) is a high level interpreted language that is commonly used by FPGA development tools. This article covers the basics of using Tcl.
Controlling I2C Devices from U-Boot
The I2C command in U-Boot allows reading and writing to I2C devices connected to an embedded system. This can be very useful for testing devices or quickly reading/writing values stored in I2C EEPROMs.
Using the Raspberry Pi Pico on Ubuntu
Instructions for programming the Raspberry Pi Pico in C/C++ using a Ubuntu development machine.
Cascaded integrator–comb (CIC) filters
CIC filters are computationally efficient implementations of narrowband lowpass filters. They are particularly suited for use as an anti-aliasing filter when decimating or an anti-image filter when interpolating. CIC filters are well suited for implementation in FPGAs and ASICs as they only require addition and subtraction operations and not multiplication.
Cheap LED Torch Repair
Attempting to fix a broken torch... Yes really!
Bluetooth controlled LED flashing Frisbee
A few friends and I decided it would be a good idea to make a light-up Frisbee so we could continue playing with it after it became dark. I decided to take it a step further and add control of the lights by via Bluetooth!
Using an HD44780 alphanumeric LCD screen
The Hitachi HD44780 is an LCD screen controller used to control small alphanumeric LCD displays. This post details how to control these displays.