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derek

About Me

Missing Mr. Wizard and Patrick McGoohan.....

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My Blog

pin change interrupts and debounced switches

if (circuit == switch -> hardware RC debounce -> weakly pulled-up uC pin + interrupt on pin change enabled) {wait for the pin to settle before enabling interrupts otherwise ISR will be called on...
Posted by on Sat, 21 Feb 2009 14:42:00 GMT

KR9600PRO output

Nine bit output from KR-9600 PRO keyboard decoder in Apple IIcpins(pins 6-14, [6=bit9][14=bit1])0 0 00011110 0x01e1 1 00000110 0x1062 0 10000110 0x0863 1 10000110 0x1864 0 01000110 0x0465 0 11000110 ...
Posted by on Fri, 28 Dec 2007 23:09:00 GMT

avr -> ntsc -> light pen -> location

undefined avr ntsc video light pen location Add to My Profile | More VideosThe first part of the video includes a delay for clarification and the second speed is maximum.So I finally just ...
Posted by on Thu, 27 Dec 2007 18:08:00 GMT

avr -> ntsc -> freakout -> light pen

This is why I have not been sleeping.undefined avr ntsc video freakout light pen Add to My Profile | More VideosIt's just a television and a light pen that I couldn't wait to construct thi...
Posted by on Thu, 13 Dec 2007 15:49:00 GMT

NTSC composite timing sequence

; field 0 == 262.5 horizontal lines;; vertical sync pattern for field 0; 6 pre-equalizing pulses each 31.75uS, SYNC level for 2.35uS then BLANK for 29.4uS; 6 inverted vertical sync pulses, SYNC level ...
Posted by on Tue, 11 Dec 2007 08:44:00 GMT

Arduino board -> Processing, serial data

I don't have a website right now, so this stuff goes here. It's really only here to serve as a record for me.I have recently achieved success in sending serial data from an Arduino clone board to Proc...
Posted by on Thu, 06 Dec 2007 11:11:00 GMT