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Algorithm bits
Log from Modular Humanoid Robot "MARB"
In this log I will discuss some algorithm ideas I have in mind for MARB. Some are easy, some require higher math. 1. Weather forecast MARB will not be connected to the internet. Call me old-fashioned, but it has nothing to do with AI to get for instance...

Terminal-BASIC programmable calculator
Log from Terminal-BASIC
I think about Terminal-BASIC based programmable calculator, like MK-90 I am planning to use Arduino DUE, TFT screen schield and custom matrix keyboard of40-64 keys.Does anybody know, if this shield is compatible with arduino DUE?Actually, I'v just tried...

FAT32 File Format
Log from OSI SD Card Operating System (OSISDOS)
When you search google for FAT file format you get tons of pages on formatting disks. It's harder to pull out the detailed format of the SD card. Wikipedia to the rescue (Design of the FAT file system). A less technical FAT32 Wikipedia page is File...

SATA, DDR3, Verilog Visualizer and Other Stuff
Log from Nysa: FPGA Development Environment
SATA StatusAfter weeks of painful debugging. I have been able to read and write to the hard drive!I ran into an issue though... the speed at which I can communicate with my FPGA to/from my computer maxes out at about 16MBs and the hard drive reads/writes...

V9958 - Beyond Hello World
Log from rosco_m68k
Development on the V9958 board continues apace, and after a false start due to a silly mistake in the first revision things are back on-track with a revision 1 prototype. The design is now validated and working really well. So far it's baby-steps in...

First video out
Log from Gigatron TTL microcomputer
It seems I have reached the base camp. The el-cheapo 7-inch LCD monitor on the right is connected to the output port of my breadboard TTL computer. The computer is now running at 6.3MHz and runs a software loop that generates a VGA test signal. The colors...

Three Dollar EC - PPM Meter [Arduino]
Log from Hacking the way to growing food
This Blog will Cover How to build a cheap EC meter for your aquaponics/Hydroponics or water quality related projects. We are not going to get into what the ideal value of PPM or EC is, Just cover how to measure and quantify a fluid.We will be using this...

Firmware hacking
Log from Model S BMS hacking
Here is a rough schematic of the isolated bus circuitry. It looks like there is some shared "open collector" style bus on CH4 of the isolator, with D8 and (I assume) a pullup on the BMS controller board. But so far I've only ever measured this line being...

B0 is complete.
Log from 74HCT6526
Board 0, which includes DDRA, DDRB, PORTA, PORTB, and the 65xx bus interface is completed.

The Story So Far-- Explodophone 1.0 Part 2
Log from The Explodophone
Now for the other half. For maximum starting flexibility without taking the cost too high, I opted to go two octaves, using notes found on the white piano keys only, i.e., notes with only letter designations and no sharp or flat symbols. This means I...

Topology (1)
Log from Programmable Precision Resistor
In this post I want to share how I selected a suitable topology for the resistor network that will be the core of the programmable decade resistor. Although I did some online “research”, the following criteria determined my choices: Switch...

Directory Stuff
Log from OSI SD Card Operating System (OSISDOS)
I put a bunch of files on the SD card so the directory spans across multiple blocks. It might be fun to have a directory listing. The front of the first directory block has: 000 42 20 00 49 00 6E 00 66 00 6F 00 0F 00 72 72 00 B .I.n.f.o...rr. 010 6D...

rf24boot: A huge update
Log from rf24boot: The NRF24L01 bootloader
There hasn't been much going with rf24boot for a while, till I was playing with esp8266 and accidentally writing frankenstein firmware for it. Despite being cool and cheap, esp8266 still consumes way more than nrf24l01, so I'm back to rf24boot. This...

B1+B2 completed. Also, facing my first real problems.
Log from 74HCT6526
Finally, B1 and B2 are completed and they.... kinda work... Although I'm going to have to check quite a few things.Remember how B0 performed flawlessly, both when connected via the expansion port, and when replacing CIA#2? Well, that's no longer true....

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