If you want to fit a zero insertion force (ZIF) socket you might like to consider this strategy.
Most PCB designs do not allow for ZIF sockets to be soldered directly to the PCB. The holes are not usually big enough for the sturdy ZIF socket pins and there are usually other components too close for the ZIF socket’s larger footprint.
By raising the ZIF socket with an intermediate IC socket or two the ZIF socket is raised clear of most other components and the large ZIF socket pins do not need to fit the holes in the PCB or damage the soldered in IC socket. The ZIF socket pins can be jammed into cheap IC sockets but not turned pin sockets. This method has proven convenient and reliable. I guess it would not stand being shaken around but for development and static systems it is fine.
SC130 is an easy to build, low cost, Z180 RomWBW Computer. The kit comes complete with serial adapter, USB cable, and a micro SD card adapter. Just add a micro SD card for storage and a computer running terminal software, and you have a complete system able to run CP/M software.
In part 1 of this series we took a very quick tour through the whole process of designing a product. In part 2 and part 3 we designed the electronics for a digital I/O module. We will now design the circuit board.
In part 1 of this series we took a very quick tour through the whole process of designing a product. We will now begin a much more detailed look at designing a Digital Input/Output interface for a Z80 computer.