a1k0n.net

In addition to the VGA donut, I submitted two other entries in the Tiny Tapeout 8 demo competition, where you submit a "tiny" ASIC design (room for about 4000 logic gates) that outputs 2-bit RGB to a VGA port and 1-bit audio to a speaker.

[Update 12/19/2025: I got the chip, and it works!

My DIYRobocars autonomous RC car has come a long way since my last post on the subject.

My little donut.c has been making the rounds again, after being featured in a couple YouTube videos (e.g., Lex Fridman and Joma Tech).

Since February 2016, I have been participating in DIYRobocars meetups here in the SF Bay Area, wherein a bunch of amateur roboticists compete in autonomous time trials with RC cars.

The Arduboy is a cute little credit-card sized Arduino-compatible with a 128x64 black and white OLED screen.

Play Load What is this thing?

[Update 1/13/2021: I wrote a follow-up with some optimizations. ] There has been a sudden resurgence of interest in my "donut" code from 2006, and I've had a couple requests to explain this one.

[Update 10/21/2015: Changed the title from "six lines of C" to "462 bytes of C" to avoid endless arguments about what constitutes a line of C code.]

[Update 8/2/2011: you can play against a dumbed-down Javascript version of the bot here.]

b[2080];main(j){for(;;){printf("\x1b[H");for(j=1;j<2080;j++)b[j]=j< 2000?

_,x,y,o ,N;char b[1840] ;p(n,c) {for(;n --;x++) c==10?

(compile with gcc -o donut donut.c -lm, and it needs ANSI- or VT100-like emulation) How it works k;double sin() ,cos();main(){float A= 0,B=0,i,j,z[1760];char b[ 1760];printf("\x1b[2J");for(;; ){memset(b,32,1760);memset(…