Using only an ultra-bright white LED, red blinking LED, PNP transistor, and a diode, the circuit gives a strong visual indication of current consumption by blinking brighter and more frequently as ...

The test circuit used 17 "slave" LEDs plus the flashing LED. Peak collector current measured 155 mA using the 3-V rail. A final version of the circuit incorporated a surface-mount transistor and ...

I would like to note that since the 68000 has 68,000 transistors, it’s still possible I’m using fewer transistors to blink a LED than I would with an Arduino.