Labels:text | black and white | font OCR: See Fig. 1 for the basic tone generator circuit. THE GREEN BOX & THE BROWN BOX For each of the 40103's, the output frequency ix given by Freq = 1000000/(8"(N+1)) where N is the -- BY Ted Vail & Nick Haflinger base 10 value of the 8-bit word applied to the It seems like there are so many colored boxes 40103 's input. All of the @ bit words and the around today, so here is a short summary of the resulting freqs are listed in Table I known types . A code of 10110001 (177) yields an output BLUE - Gives the user the power of a long distance frequency of 1000000/(8*178). or 702. 24719 H2. operator, for free. Very powerful. which is close enough to 700 Hz. For a given freq. RED - Imitates the "coin deposited" tones at a pay the code can be found by solving for N. phone, thus reducing toll charges ...
