Olduino/Z Current Draw With CMOS Chips
When I first tested the Z80 Membership Card I found current draw well over 100ma. I’ve since replaced the Z80 CPU, the ROM, and the SRAM all with CMOS parts. I tested the power draw today and found it down in the 25ma range. The processor was the most dramatic difference so for less than $5, it’s a worthwhile upgrade.
These are 40 pin chips so you have to be judicious about inserting them. I was as careful as I’ve ever been but i still had two pins bend and they felt particularly fragile. It was a new chip from digikey so i doubt it was a pull but I hope i don’t have to change it again. The only other 40 pin chips I’ve dealt with lately are 1802s and they have been much more rugged.