Gigatron Hackers

I had spare Pluggy McPlugface for ROM v5 (from tindie) and for just spending my time I decided to solder it togeather. For my total suprise it seemed to work with SN74HC595. Probably this fully assembled version Pluggy McPlugface needs 74HCT595 - this does not. Keyboard and everything works fine. Al...

I found this searching to what is different sn74hc595n and 74hct595: ”The 74HC595 operates in a voltage range of 2-6V, while the 74HCT595 operates within a narrower range of 4.5-5.5V. Although the 74HC595 can operate in a wider voltage range, it has a dramatically higher propagation delay than the 7...

I had to try to make a DIY kit from budgetronics. Lack of skills probably didn't get it all working so ended up using it as spare. I ordered second one "Fully Assembled Gigatron TTL" from ebay and got it at reasonable price. When it arrived it was missing U39 serial input IC and another ma...