Turning a dial can change CPU speeds on the fly - Throttle Blaster uses Raspberry Pi Pico to adjust frequency on classic chips down to the megahertz
by mc@matthewconnatser.net (Matthew Connatser) from Latest from Tom's Hardware on (#6K18E)
The Throttle Blaster upgrades the turbo button on old PCs to a turbo knob, allowing for granular clock speed control.