3 ms·
The heatsink cools the LM7805 power regulator, not the CPU. In the original 48k Spectrum, the heatsink was internal.
by bewilderbeast 3y ago
The heatsink cools the LM7805 power regulator, not the CPU. In the original 48k Spectrum, the heatsink was internal.
- nickt 3y agoAnd if you use a modern switch-mode replacement, you don’t need a heat sink at all. I know some folks like to put small heat sinks on the ULA though.
- SomeoneFromCA 3y agoSoviet clones had ULAs built from individual 74xx ics. No need for heatsinks!
- nickt 3y agoExcellent! I need to mess around with them at some point.