Schematics

 Display/Optical

ICM7228B IC Driven One to Eight Digit Seven-Segment Display

Externally Controlled One to Eight digit Seven-segment LED display

Ten Cascading LED Circuit

 microcontroller boards

8051 Microcontroller board with 16 I/O and up to 64KB program memory

 eprom/eeprom programmers w/software

eprom programmer (650 kb zip. schematics, PCB, software, documentation) -Andrew J McCubbin

Electromechanical

Motor Reverse With Speed Control