The 74HC165 is an 8-bit parallel-load shift register. We can have this as an option for reading many switches kinda like for mechanical keyboard builds. You can chain many 74HC165. I just used the native SPI of the XIAO nRF52840 (Sense) to clock-in the read data. The 74HC165 is not a native SPI device but…
This is just a rough documentation for this project of mine. Schematic: Not found on the schematic and picture but the latest one has 100nF and 10uF on the 5v pin. Board: D16 – SW1 (Use internal pull-up)D17 – SW2 (Use internal pull-up)D21 – SW3 (Use internal pull-up)D22 – SW4 (Use internal pull-up)D23 – SW5…
This is just a quick entry to my project for additional information. Underneath this green board, there is the header for the built-in Arduino Leonardo of the Lattepanda Alpha. This board is for the fans and fingerprint sensor. I made a simple Python script to communicate with the Arduino Leonardo using pySerial to adjust the…
Do you need more keys in a keypad for your projects? You can use an Xbox chatpad. It is sort of a complete keyboard. I actually got the idea from The Ben Heck show(It is now called element14 presents): His chatpad has a PIC microcontroller on it that could be reprogrammed if you got a…
So what’s a Pmod? Basically these are modules that you will just plug that follows the Pmod interface specifications. You can browse Pmods by Digilent here. You could plug these into microcontroller boards or FPGA boards that supports the standard. What I followed is the Pmod Interface Type 1A which utilizes all the GPIO on…
I want to talk about a CPU that I designed way back in 2016. I implemented it in C as a VM. A friend of mine, Bjørn is the one who made an assembler for it which is written in F#. Periwinkle is an OISC as opposed to RISC and CISC. It also has no…
