This was a simple project I finished a while ago, but never wrote anything about.
The lack of this device was discovered while debugging my 6502 computer (which I will cover later). I needed to debug the address bus while stepping through a simple program in ROM. Due to the lack of a advanced oscilloscope, I wanted a solid device I could hook up to anything with a 16 bits wide bus or less.
This is the final layout. The address bus is segmented in 4 bits, each passing through a MC14495, which happens to be a CMOS 4-bit parallel to 7-segment driver. All I did was to connect the dots and add a few rails for the power, and etch the bugger.
Yes, it is a simple device, but it has proved to be extremely functional and useful.
hi, what country are you from? Such golden MC14495 ic is not available in my country. damn! Also, as far as I know, motorola stopped manufacturing the hex to 7segment driver decades ago.
Hi Glenn. I bought the MC14495 lot on eBay a while back, and they are great to work with. It's a real shame they are obsolete now, because my stock is running low. When the digits 0-9 are required, I'm using 74LS47 instead.