Labels:text | font | black and white | white | paper | ink | document OCR: MILO FONEBILL ISSUE TAP AUTO-COMBO RED-BLUE BOXES As Milo said in his letter, the box is made up of three sec- tions : front panel with keyboard, memory and logic board, and oscillator/amplifier. The front panel is pretty explani- tory. The only comment I have is that the diodes be silicon. In order to conserve space try using dual diodes (Motorola HEP R9002). The other two boards use digital logic. The first thing you should remember is that the pin connections for power are not shown in the schematic. On most 14 pin JULY 1978 NO. 51 chips pin 7 is ground (-) and pin 14 is positive (+). On most 16 pin chips pin 8 is ground (-) and pin 16 is positive (+). The following chips are used for external logic : 4012 By now all of our subscribers should have received their Quad. NAND gate : copy o ...
