From the image above you can see the front, the back and the t-scale for my caliper. Bellow I will list a few things I considered while making this design. I chose the STM32F103 used in the blue pill because it is capable, cheap and schematic is...
A story of developing this mod...I was asked to do a latch mod on a Boss pedal, a thing people already did in a different way: by using a latching footswitch, either added to the pedal itself or external. Both ways required drilling of the pedal's enclosure...
Tasks done Downloaded djvu OCR text from archive.org. The original article is okay but the listing is heavily mangled.Downloaded djvu listing scans.Cropped off advertsCut into single columnsOCR with Google Docs. Results are worse than djvu,...
Dr. Dobb’s Journal, December 1986, page 48. A table-driven assembler that can be modified for other processors. Series 32000 Cross-Assembler by Richard Rodman, 1923 Anderson Rd., Falls Church, VA 22043 The 32000 processor features generalized addressing...
I've been busy working on the PCB and routing on the computer, but while I'm getting much quicker and better at it, I've ran myself into a corner. We're gonna need a bigger board... This project is one of odd anachronistic design choices, pulling in...
4-digit display shield build on the Proto board.See Fig.1. Parts List: 1. Arduino Uno R3 2.HiLetgo R3 Proto Shield Proto Expansion Board 3. 4-digit 7-segment LED display module Model: 5641AS , Size: 0.56 x 1.98 inch , Emitting...
Bottom Line Up Front Plug it in, turn it on, Darn it, my coin acceptor does nothing. OK, so what’s this orange (amber) LED all about? TL;DR I got such a deal. So, I saw an auction for a dozen Microcoin QLs, about $100 + shipping. That’s a great...
Bottom Line Up FrontccTalk is an open specification for communication between hosts like vending machines, your PC or perhaps even my pinball machine (someday!) AND coin acceptors and bill validators. Connect a data line between the ccTalk port and your...
Bottom Line Up Front The data-line for ccTalk is on pin 4. The power and ground pins are on pins 1 and 3. Power and ground are identical on both the NRI connector and the ccTalk port. Like no-duh. Well, best not to make assumptions. TL;DR So I need to...
Bottom Line Up Front Falstad is an on-line circuit simulator. It was used to simulate the ccTalk interface. The simulation confirms that the circuit couples and decouples data sent and received on the ccTalk protocol’s single data-line. TL;DR Measure...
Bottom Line Up Front I started with PuTTY; used its serial mode. However, it is not designed to send bytes. I immediately switched to RealTerm. That let me easily send a ccTalk poll command. TL;DR A few Google searches for escape sequences and ways to...
Bottom Line Up Front Send the following bytes: 2 0 1 254 255. This is a ccTalk poll command. Get an acknowledgement back: 1 0 2 00 253. Know that your coin acceptor is communicating with you. Try other ccTalk commands hereafter. TL;DR As my efforts continue,...
This is a familiar situation for many of us. Do I hire someone to do this job or do it myself? Either way, there is a sub-decision about the approach. Let's consider that sub-decision first.Replacing the old tile can be done with either traditional tile...
In this project log entry, I'm recording various measurements so as to have them all in one place instead of the zoo of tiny slips of paper where I have previously recorded them. Some measurements will only be determined after I have done some demolition,...
Strictly speaking, this isn't part of the tile job. Since I was going to be opening up the walls, I planned to replace the tub/shower combo water controls. The current controls were probably the originals from when the house was built 30-40 years...