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Good LED Bad LED
rsbohn
11:33h
I put some LED's on the WOSP circuit board, just to see how they would fit. Unfortuantely one was bad, so I had to pull it off again. I bought more LED's, tested them, and added them to the board. I'm tired of the perfboard already. Next time have to get a circuit board fabbed instead. I want to get at least one state completed so I can connect it to the Arduino and try it out. This is the biggest homebrew project I've ever undertaken and I really am developing some new skills as I go. ... Link
Building the WOSP
rsbohn
13:11h
Started melding solder again last night in an effort to build my way old-school programmer. Mounted the sockets for the buffers for the data and address indicator lamps. Then I started routing the data bus. This is more work than I like... ... Link
Two Mega8 processors for WOSP?
rsbohn
14:20h
My first idea was to use one processor for the Way Old-School Programmer, but I'm not sure I have enough IO pins for all the lights and switches I want on it. I thought of using the Tiny2313, but maybe I'll go ahead with two Mega8's. It would make the programming easier in one specific way: All the IO gets processed by one chip (update the lights, read the switches, over and over again). The second processor runs two SPI channels, one to the IO processor, the other to the chip you want to program. Anyway, I've got the switchbank bolted together and wired up. Bought some perfboard, so I'll start working through that part of it. I plan to mount the LED's on the circuit board and connect the switchbank using a header (leftover from the Arduino protoshield). This is so much fun! ... Link |
8140 days of detection
mod: 12/3/08, 5:42 AM days of detection... PMOG owner
BiographyRandall Bohn lives in Orem, Utah, USA. He works as a Software Quality Engineer. He is a big fan of the AVR line of microcontrollers. He has been in the computer industry since 1989. Randall is married and has three children. rsbohn can be reached via gmail.com. status
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Arduino Starter Kit
MAKE Blog How-to Tuesday posted a challenge: Optimize the sketch code for a pressure sensor bar graph. Here is my second attempt: int gate[] = {10, 20, 50, 100, 200, 32767}; void setup() {DDRB = 0b00111110;} void loop() { int dval = 0; int rval = analogRead(2); for (int x = 0; rval... 12/3/08, 5:42 AM Measuring Supply Voltage
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I also added a battery so I could test components out right on the board. I don't think a small 3V battery will run the whole thing, so I 'll probably add a 7805 5V regulator and some external power lines.
