Direct-to-Cell: cellphone communication through satellites
The first commercial brain implant
DART spacecraft changes an asteroid’s orbit
Non-invasive current sensor (2nd edition)
Meet the 4093 (2nd edition)
Remote control vehicle
Shift register
Meet the integrated circuit 4017
Multivibrators with 2 transistors: astable, monostable and bistable
Digital counters
Flip-flops
Karnaugh map
The robot show in China