This circuit is from an April 1991 Radio Electronics magazine. The circuit uses power MOSFETs and an integrated circuit from that time.
This article is old, from 1994. But, for those who have an old PC and want to use a joystick from...
The passage of an object in front of the LDR, producing a shadow or even turning off the ambient...
The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and...