Meet Sparky

Quick project last night to upgrade a skull with flickering red eyes. Steph had properly themed bouncy balls to go in the eye sockets.  I added some red LEDs and an ATTiny13. I borrowed two different code snippets to make it blink with a nicer look. Hackaday Link for project 1 (used the LCG formula) Zenlogic’s PWM code (modified to use only two outputs) Click to view video.

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New Oscilliscope Part 3 – Screen Capture

With the TDS544A up and running, I decided to take a crack at getting data off of it. The scope has a floppy drive (but my laptop doesn’t), a GPIB port, and a printer card with both parallel and serial interfaces. The hardcopy menu has around 18 options for filetypes, and is capable of sending the screenshot to any of the ports or the floppy drive. Of the options available, I decided to try sending a windows BMP file over the serial port. I used a F-F null modem cable and a USB to Serial converter. On the program side, I started with this autohotkey script which spews data from your serial port into notepad. With a little bit of munging (removing anything to do with sending data, and removing some of the ASCII conversion logic), I was able to get and write BMP files. A full 640×480 color bitmap […]

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