TAP No. 62 - Milo Fonebill's Automatic Blue Box Explained

Milo Fonebill's Automatic Blue Box Explained by Lavoisier Advantages of Milo's Box 1. Can hold 5 10 digit numbers. 2. Each number is outpulsed et the proper rate at the touch of a single key. 3. The current drain is very low. When not pulsing the battery drain is only 40 microamps. A single 9 V alkaline battery will power it for a year of on time, unlike Peter Piper's crogrammable box (TAP # 56) which takes two 9V batteries and pulls 2lma in standby Disadvantages of Milo's Box 1. The box is complex. 2. Because of its complexity it is bulkier than the usual manual box. The enclosed schematic is of a working Milo Fonebill BB. It took one hell of a lot of study to figure it out from Milo's drewings. I'll describe how it works in 3 sections: 1, Number entry; 2, Playing back the numbers, or RUN; 3, Clearing the Box. 1. Number entry. Assume the box has been cleared and a lis in all 64 bits of each register. I'll get to the reason for this later. The ewitch enabling the keyboard is closed. Now assume that the KP key is vressedthen lines 1100 and 1700 go low. A "O" (0 is low, 1 is high)is placed on pin 15 (Data In) of IC 9 & 12 but the data is not entered yet. At the same timepin 4 of IC5A and pin 13 of Tekcgo low which drives pin 11 of IC14C low. This in turn mekes pin 10 of all the shift registers low through ICKA and IC16B. This puts the shift registers in data entry mode. Meanwhile charge is leaking off C3 through R14 and after about SmsQD goes high and KD'goes low. This delay ia to allow for contact bounce in the keyboard switches. QD high drives pin 2 (clock input) of all the shift registers high. ‘The data present st pin 15 of all the shift registers is now entered. Ko" went low after 9ms which, through IC6A, IC17A-F, and IC21E &F turns on the output amplifier (LM386) giving an audible click and lights the pulsing gate indi- cator LED. The LED stays lit as long es eny key is depressed. let me repeat, a O is entered into the 1100 end 1700 shift registers end a 1 is entered in the 700, 900, 1300, and 1500 shift registers when KP is pressed on the key- board. The Schmitt triggers (IC1SE&F) revlace the 4047 used in Milo's box.I could not get the 4047 to work in this application. Hesides the 74Cl4 Schmitt trigger is cheaper. Note also thet the P gate indicator driver should be a non-inverting buffer and not an inverting buffer as Milo hows it. The 4031 shift register, unlike other CMOS ICs, has a large clock input capacitence (pin 2) so I play safe and drive them with 3 inverting buffers rather than 1 1s Milo does. The 4031 is clocked by the positive edge of the clock end not just a high level so the clock input needs a sharply rising wave form to clock it. 2, RUN Mode. Assume that 2 ten digit numbers each with & prefix of KP and a suffix of $ have been entered into the shift registers. Before going on I will describe the 1 of 2 data selector composed of the 3 NAND gates IC3B, C, & D and the inverting buffer IC16C. Two clock rates are used: 1280 Hz supplied by the oscillator 1023; 10Hz at the output (pin 3) of thedivide by 128 counter (1020). The 1280Hz clock joes to one input of the data selector(pin 9, I03D) and the 10Hz clock goes to the other input(pin 12, 103C). The control signal appears at pin 4 of the NOR gate 10158. when this control voltage is low then the output of the data selector (pin 4, 103B) follows the sigh speed clock. When this pin is high then the output of the data selector follows the low speed clock. Now, let's press the RUN key. Imrediately pin 4 of I04B goes high and stays high for 50ms (I'll explain the reason for the 5Oms later) and the output of the NOR latch composed of I013¢ & D (pin 10, IC13D) goes high which sends pin 3 of IC14A low. After 50ms this turns on the clock oscillator (pin 4, IC23) and drives pin 1 of IC6A high which turns on the output amplifier and the P gate indicator. Which clock will be used by the data selector? A total of 24 digits have been entered into the shift registers. Since these are 64 bit shift registers the date is 40 bits away from apvearing at the output. The 2 NAND gates IC5B and ICKD see all "1s" at the Q output (pin 6) of the shift registers. This through IC159 end £015B selects the high speed clock. So, at a rate of 1260Hz data is stepped through the shift registers. MAR-APR 1980 NO. 62 After 40 clock cycles two things hanpen, either of wrich will reset the RUN latch and turn off the clock. The "End of Register" (ZOR) counter (IC19) has reached a count of 64 (it also counts when the numbers are entered) placing a high level cn pin 6 of IC14B. Also the K+ Ko detector composed of the 3 NAND gates IC2C & D and IC3A has detected KP, at the Q output (T= not Q) output (pin 7) of the 1100 and 1700 shift registers. This places a high level at the other input (pin 5) of the NOR gate IC14B. The negative going pulse at pin 6 of the reset generator (IC22) triggers @ 2ms output pulse et pin 10. This resots the RUN latch, the EOR counter (1019), the divide by 126 counter (1020), end turns off the clock. All this happened in €1.25ms, 50ms delay before the clock turned on plus 31.25ms to shift 40 bits at 1280Hz. But we still haven't olayed our numbers back. The next press of the RUN key gets the first number. KP of the first number is at the output of the 1100 & 1700 shift registors. The output of the K+ K> detector is high making the trigger input (oin 6) of the reset generator low but this doesn't do anything. The reset generator is negative edge triggered. Let's press RUN egain. Again we get the 50zs delay before the clock turns on. The "No Data Detect" gates sce data present at the shift registers so the data selector selects the low speed clock. Pin 13 of the NOR gate IC15C goes low and pin 12 of the same IC is also low because it takes 64 clock cycles before pin 5 of IC20 will go high. ICSC then drives ore input of all the output NAND gates high (ICIA, B, ©, D, IC2A & B).Pins 7 of snift registers IC9 and ICl2 are also high so the output of NAND gates ICIC (1100) and I¢2B (1700) go low which turns on the 1100 and 1700 tone generators. The output amplifier and the P gate indicator are also on so we have 100ms of KP as per Milo's specs. KP is 100ms because of the 50ms delay before the clock sterts running. This is the reason for the 50ms delay. Therefore R2 and C2 should be chosen to give a 50ms deley. Pin 3 of 1020 goes high 100ms after RUN is keyed. This turns off the tone generators and clocks the shift registers to the next number. After 50ms of silence pin 3 of IC20 goes low for 50ms and we get 50s of tones for what ever number is after KP end so on for each number until KP of the next number is reached. Then the Kj + Ko detector ‘output, which went low after KP of the first number was shifted past, again goes high trigzering the reset generator which stops the clock and resets everything. A second vress of the RUN key plays the second number in the same way. After the second number is played there are 40 bits of no data so the "No Data Detect" selects the high speed clock which rapidly (31.25ms) recirculates KP of the first number to the output of the shift registers and everything stops. The box is now ready to replay the first number. 3, CLEAR. When the CLEAR key is pressed pin 1 of ICI3A goes high. This is one input of the NOR latch composed of IC13A and B. This drives pin 3 of ICI3A low which, through IC4A end IC16B drives low pin 10 of all the shift registers. This changes the shift registers from the recirculate mode to the date entry mode. At the same time the other output of the NOR latch (pint, IC13B) goes high. This through IC15B causes the data selector to select the high speed clock. The shift registers ere now clocked at 1280Hz with their inputs (pin 15) all high. This loads a "1" in all 64 locations of all the shift registers. Since the complement outout (@) is used the shift registers are cleared. After 64 counts the EOR counter goes high (pin 5, 1019) and resets the CLEAR NOR latch. The box in now ready to accept new numbers The Tone Generator Board The 4017s are the oscillators and are operated at 10 FRONT PANEL times the desired output frequency. The output of each oscillator is fed into a digital sine wave generator (see ‘Don Lencaster's "CMOS Cookbook") which gives a 10 step approximation of a sine wave at 1/10 the input frequency. rt? 700 Unlike a square wave whose first harmonic is the 3rd at ty 1/5 the power of the fundamental, the first harmonic of a 10 step sine generator is the 9th at only 1/9 the power of the fundamental. Thus nonsof Milo's elaborate filter network is requi lately I've learned (TAP of course) that squere waves work as well as sine waves so the board could be simplified by operating the oscillators at the correct frequency and eliminating the digital sine wave generators. The output amplifier (LMG86) is very convenient and a easy to use. Its output voltage is automatically biased at ¢ the supply voltage. Its output impedance is 6 ohms to watch the most common speakers. It is designed for battery operation and has a low quiescent ourrent drain. Milo's schematic did not include it, but the voltage regulator is required. The frequency of the 4047s is some- whet voltege dependent. Do not make any component substitutions in this regulator. It ie designed for CMOS circuits and has a very low power drain but can still supply quite a bit of current when necessary. When the box is outpulsing for instence. You can find more about thie regulator in the National Semiconductor "Linear Applications, Yolume 1", AN71-7 & 8. For the buffers on the logic board do not substitute the 4009 or 4010 for the 4049 or 4050. The latter 2 can supply much more output current than the first mentioned pair. 1500 1700 Two tips for working with CMOS circuits. First, the inputs are static sensitive. Work on a grounded surface and ground yourself through a 1 meg resistor when handling CMOS circuits. Second, the inputs of unused devices must go some where, either to the positive or negative supply, or tied te a functioning input. Inputs cannot be left floating or the device may oscillate which will pull a lot of stendby current. Remember that CMOS circuits theoretically drew no current when they are not switching. I have not shown the positive and negative supply leads on the various gates on the logic board. Just remember, all the gate packages need positive end negative supplies. < TED PGATE INDICATOR Vr 1X CLEAR a as s R RUN Lntinnhy $ 3 Hot oy 8 = S er 3 E a3 <= os 3 =? ‘ee cUy i ul ow a » 4 4X & = = 3 a ° 3 $ a 3 Py ry At $s = a cc) a 2 5 4 a z= 5 s & Ly 2 s 3 s wa $ -i- 3 i g 25 gu oe = & . 8 > rFeE2a2 "ge eg 5 3 ge 28 z 38 8 ¢$ iy eh SR E223 #3 z ~F 8 gucs 5 P85 w we fe He & 2522 2522 vo Ra Fw a #37 S92 882 Sige BR yssgg2 ize y uo9 Sha BaD we z 232. Behe ea des = ae* goa bet aed eyk PER a whe gear 3 beers o-=3o ate wT E REE z° Re PRAgSeESSE “ Fe* 2 Shae Gat | xi a ee ~ wad a WTO S88 we < gw 8 wo Kxewen wg BS L888 ZZRue 3 |Soocoonu Wed pT OST Ee Geli ga B SJocohmic. NAOT KAST OT Z eima2es Matera s 4 seebeeeend } tose BREEBSRERS °° oo 2 8 H88Sssss 8 3s 8ee8 Prsaes FS es See 3 = LOGIC BOARD +P GATE PEATE INT > 2600 GATE g cy ° °° & nig = <8 ari, oF). ate an s 8 ry * oo 3K Yeo iz 8ae < See S sic ov 5 dD) No DATA DETECT Ic4D 1c1s ° are ele fiz aS) oe FS} = RIO cr aie Else @| °C TS pana, ? jae u : By 50m, Ry + mi 4a 3 8 8 = +2 The queet for the perfect "level t ee ofter cee in vein. ‘uch evubetences terd te be 64 it er ex to cbtein, herful to :ind ené nocy, or, ix .ererel, uninpreseive ir corperieor te their lest rere One substance thet hre few if ery crewor (eckeee ) This eesily vapour e bietory es & (th by diethyl ether or just ‘ethylether), rey highly flencable lic h over the past couple of ee interested cen refer to "licit exd recker) ené the "ether jez" have et tines teen quite ler. Ite edvanteges and virtues ere thet it is cher 1, easily eveileble, medicelly sefe, eré, of course, enezing buzz. Keving used ether on end of ver of years, as well es tuming on & signific; of triercs without celeterious effects enc enthus reviews, ether hee the Cz Y. Mancies Leel of Ap sefe enc effective recreationel cruc- ne only real drewback to ether glue-eriffing thet ite use conjures problem since consunpticr ceuses the stron, of ether to pervece the whcle aree, sort of like Yninforned fenily nenbers and friends tend to get quite concerned (ené scnetines quite hoctile) wher they notice it. They inzedietely essure you ere ueesecring your breir cells with elue, you fuckin! degenerete, you. Test essurec however, thet ebher is sefe end unrelated to clue, toluene end other cengerous industriel solvents. Another point to teke cereful note cf is thet all flenes nust be kept away from ether, ite vepour era the whole generel aree. Ether ang ether funes sre extrenely flenmeble. This reens "C snoking et all, ro cendlec, netches, etc. If you choose to forget or disregeré this, remember that erding up in e hospital burn werd,or nore probebly snuffing it in the resulting explosion of cearing flemes ere rost unpleasant weys to come down x 5 Ei 33 4. ote 7 fetes fre |ee a8 I" 88 = s as # 3 ° 5S s ° & & & 22 8 = Z : a c n 3 Ether cen ve purchacec fre: a crug hemicr] y or rippec fro: your locel school chesistry or leb. ither is ubiquitous in the orgenie chenistry or Jab reegent or solvent, ana used to the bio leb. If you tuy ether, yy you need it es e cleen istry expt. or to hncck cut flies geneticr expt. shoule cost bout $7-5C for e aottle or cen which will last quite @ lore tine. Inbibe ether by poring e little or ¢ cloth or kleerex, receping ona putt (or pessine cn) the conteiner, holeing the cloth our ncee cr south ené inheling ceeply the vapours. It smells pretty raunchy, but this diseppears ef The initiel high wears cff very cuickly, therefore the bottle rust be pessed eroura continuovsly with e group (sclitery snorting ie bed for both eesthetic and sefet) reasons). "“scgarting" the ottle is considered poor forn. Hther being en ereesthetic cecessionelly e reel fiend will pase out end Lee] over, This is nothing to get excited ebout. cen either be slepped up or left to he's etill breathing every now and then if you're worried. The ether high is truly incredible. Cne cer ettein # relly intereeting, super-stoned, psychedelic ctate that is truly out of this world. You cen see tine stop, or the secrets of the universe urfold. As ether-head H.D. Thoreau reportec, "You go beyond the furthest ster." Hunter Thorpson's eccurate descréption of etheronenia in his excellent "Pear & Loathing in Las Vegas" is elso worth checking out. Lestly, the sriell of ether stays on your breeth for a while innediately efter use end it is hard to disguise and explein, so stay awey from straights if possible. Use drugs wisely end in moderation and they will improve your existance. Heppy stoning end remember what the dormouse said... Lolo eb, @ very cc cut flies exo rets in eskeo © etreight exc rt, or for e ch The over-inculger cresus. hake sure Everything you always wanted to know about 1034 uz tones but were afraid to ask by the 4agician As aany of you know, there is a fouctn tone used in the Touca Jone aatrix that is not ancluaed on standard Touch sone phones. This tone is 1033 siz and can be obtained in three ways. You can try to locate a ailitary 16 button puone, but this is usually very dizficult. the other choices are to buy a vo button oucn Tone encoder usea by uaa railo operators or tu modify a veil Touch Tone pnone by adding an adaitionai switch to the unutidazed tap on tne toroid transfurser. Now that you know ways to generate 1634 Hz, you mignt “onder wnat it is used tur. ‘the main use of this rcequency is tor control sagnaliing in AUIUVUN = (madatacy ana LOL AvTumatic Voice Network). [he Duttons in the extra coausu are aesignateu Flash Override (1t33 + 097 Hz), Plasa (1033 + 770 Hz), Intermediate (1033 + 652 Hz), and Priority (1033 * 941 uz), top to buttow. — Eac’ button supercedes the one below at, with flash Uverciue reservei for the President an the event or a “national emergency". The other use of Wess b2 as an ea sell control signalling. It can be used to setup toii-tree loup-arounds, "ass conterence Calis, and even lets YUU become the Intormation vuperator. When you place a call for ion distance information, you are outed through an acy (Autowatic Call Distcabutor). In about >¥% or the area codes in the US, 1t 4s possible to access Acb internals via Jb33 Hz (e.g. urea code 4U> is always pnun!). Yo gain access to Acb, Call the information operator as usual (14505-555-3212). AS the cais goes tarough, keep the rriority button pressed; tae moment the operator answers, you are thrown into ACY and you widi ceceave a dial tone pulsed abuut once per Secund. dhe functions now available to you througn ACD are documented in the Ma 5eil book "Notes on Distance Wialing' as the "100 series test Loaes* dust use the last digit of the code (e.g. 10Z would be executed Ly pressing Z and wiil provide a 1000 liz tone). The codes of interest to us are 0 and 7. Code 6 enters you into one sige of a loop-around and Since tae anfoLaation number is Kon-supervising, the caal is toli-tree Have your partner in crime access ACD ana use coae 7 to access the otner side of the loop-around (sore area codes are getting Smart and passing only 1000 Hz). If the code 6 person hangs up ang tue code 7 person hangs on, acb will sometaaes aaltuuction and route all information caiis to the code 7 person instead of.the real ainrormation operator. Now that you are the information operator, cave those folks Some REAL information 1ike the audress to subscribe to IAP. This same tecnnigue provides for mass conferencing since ail caliers to that anformation nuaber are connected togetner!!! ACD 2S heat and poun to experasent wath as long as you don't stay on tov Long. I*a not sure now iegal at as to aess with ACD sance you're not aefrauding T2LCO of ats lawful charves, but as Soun as you con’ct to another person, you might qualify for arrest under wire traud statutes (boy, aren't you lucky?!) Please feei tree to send questions, comments, etc. to Ine dagician, c/o TAP. Cariada & Mexico reign $8, t Class $7, cu ones Courses B- AC Basics, C - Phone Basics, D "AP Mugs - $4, 59, “AP with white TAP logo. TAP "Cracked Bell" Button - o¢ each, ammit, Miss Campbell, our world- wide computer - gwitched satellite communications and display net- work was not installed for you to issue invitations to a Thank God t's Friday party." elephone, # Boe © artist t Class in plain sealed envelope 37. ts - $4.50, Specify size and color : Small, Medium, Large, Extra Large, Black or red T-sbirt TAP Cassetie Tape - $3.50. Hear Capt Crunch, Al Bell, Yoe Engressia, and Bell Security Chief John Doherty. ealment included, Mother" Pate - $1. UPDATE ON MANUFACTURING SEALS by Agent MDA RE: TAP Issue #50.8 (May-June '78). This method of manufacturing seals for birth certificates and other official documents uses a clay called "FIMO" that is made in Germany and may be difficult to purchase locally. An acceptable substitute called "“Repla-Cotta" can be purchased from American Handi- crafts stores. (Stock #049-3021.) block costs five dollars, amount to make at least a hundred seals. is no American Handicrafts store nearby, pany can be contacted by writing: crafts, Division of Tandycrafts, Texas, 76107. Also, retail prices for tools have A two pound and it is a sufficient skyrocketed, and the price of a set of 3/32" re- verse letter punches is now twice the thirty three dollars quoted in TAP #50 -~ $66.0 A novel and easy method of obtaining seals has been published by Eden Press, tain Valley, CA, 92708, formerly called The New Paper Trip, and the seal section has been revised, too.) Basically, the Paper Trip II method uses two or more seals -- which can be purchased at seal and rubber stamp stores -- and by cutting and filing away the un- wanted parts of each seal, effected by embossing them in succession, one over to make the seal of fugg, Maine", order a seal that says something like "Moose Club -- Bumfugg, Maine" and have an engrav- ing put in-the center portion of the seal. the raised lettering that says "Moose Club" is fil- ed off the seal, only the center engraving, town & state name, and the border will be embossed. the other. For example, the seal desired can be other seal is still needed to be purchased; for this one, just have "Vital Statistics" on the top and “Moose Club" ci the bottom. ed letters of the "Moose Club" and the seal will only emboss "Vital Statistics" and the border. border will have to be removed from one of the seals, of course, but after the second seal is embossed over the first seal, it will read "Vital Statistics, Bumfugg, Maine" with a neat engraving in the center portion which will be good enough to fool almost any bureaucrat. In comparison to the TAP #50 method, the PT II method has two noteworthy advantages: First, it is less work because it is more of a method of getting a seal rather than a method of making a seal; a passable seal can be obtained the first time around. Second, the initial outlay of cash for one seal may be a few dollars less; on the other hand, the TAP #50 method is less expensive for a large quantity of seals. Therefore, if one needs only a seal or two, and his desire to spend hours modeling clay and plastic is low, the Paper Trip II method is ideal. Hitchhiker Picks the Wrong Car Milpitas, Calif, (AP) — The free- dom of the open road was brief for escaped convict Roy Dean, 29. He hitehed a ride that took him straight back to jail, Lt. Pat’ Ruch of the Santa Clara Couniy sheriff's office said she usual- 62 TAP, Room 603, 147 W. 42 St., NY 10036 x Robert Heinlein. ors TANT! Include mailing label or Xerox copy ing to TAP about your subscription, SOP each, A ~ DC Basics, Amplifier: “Taxes are not levied for the benefit of the taxed.” T-eed off ly does not pick up hitchhikers, but Dean was irresistible. His pants were stenciled “County Jail.” She said Dean, in jail since Au- gust for burglary, offered no resist- ance. “He just looked very disap- pointed,” she said, WC. FIELOS 1000-1900 ASHEBORO, N.C. (UPI) — Service station attend- ant Orlando Meintosh had no doubt what to do when a ‘The shirt said handgun, Interstate 8, ‘man walked into his station Sunday night. He followed the instructions printed on the man’s T-shirt “stick em up.” which MeIntosh did, ‘handing over $454 to the bandit who carried a .22 caliber ‘The robber was last seen fleeing toward nearby If there the com- American Handi- Inc., Ft. Worth, P.O. Box 8410, Foun- in The Paper Trip II, Edition, pages 88-89, price $14.95. 1979 (This book was “Bum- When An- File off the rais-