Joey's Electronics Projects

In the last two weeks I have made a lot of progress on my Pocket Calculator. Normally, I like to breadboard everything and have it working...

For this calculator, I am working on a more sophisticated stack system than I had for my RPN Scientific Calculator. Instead of stack item...

Recently I got interested in building a very small calculator I can carry around with me. The other calculator projects I worked on are n...

12345.6789 + 9999.99999 packed BCD on 8051 A few years ago I decided to revisit the microcontroller comparison I had done to see how m...

In preparation for the 6502-based calculator I am planning on building, I started thinking about the best way to do BCD multiplication. On...

For the 6502 graphing calculator I started working on two years ago I wanted to use an ATF1508 CPLD to do the address decoding. In another...

After about two years away from electronics, I have some time for my projects now that I am almost finished with my degree. Lately, I...