Help identifying components on a 70's schematic

The A1 (Hex inverter) is a 7404 chip. the B2 (quad 2 INPUT nor gate), chip is a 7402 B1 is a (dual 4 input nor gate), chip is a 7425 Those caps that aren't labeled. could be 1 uf each electrolytic. etc..

P.S. This circuit can be replaced by something more modern and fewer parts. But if you're trying to keep the originality of the circuit, have fun.

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B1 is 7425 B2 is 7402

Oddly, B1 pin 3 is connected; but not pin 11; however, 7400 series TTL inputs float high.

The circut could be simplified and power consumption reduced using modern components.

For starters, I'd use a 3-terminal monolithic regulator I'd use 74LS, 74HC or 4000-series logic I might replace the TIP3055 with a MOSFET I might use a push-pull output

Since A2 is a 7493, I'd assume that B1 and B2 are also TTL parts. B2 then is a 7402 quad 2 input OR gate. B1 appears to be a 7425 dual 4 input NOR gate with strobe - but it should also have pin 11 connected to +5V. (pins 3 and 11 are the strobe inputs.)

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Peter Bennett, VE7CEI  
peterbb4 (at) interchange.ubc.ca  
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

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B1 is a 7420 and B2 is a 7402.

shit, sorry it came accross as that mate, i was waiting for it to turn up on the usenet replayer, and it just has (says token timer in the bottom reight corner) i assumed your circuit was a 555 based one, hence i mentioned them in my last post.

i was going to build both circuits when i get the breadboard and components, i haddnt seen yours yet, but most definately had not dismissed it,

i really appreciate it, it looks pretty simple and does all i want,

so now i know what components i need, i'm going to get them ordered and build it, getting some 555's as well as i want to play with them... be nice to compare both compleated circuits, the 555 based one and the 40103 one.

i'm not fussed about my email addy really, i get tons of spam to it anyway, just i seem to loose a few genuine emails too, so was waiting for the schematic to be online rather than fart about having it sent to me, then it not turning up and all that. it's gazz AT kampenwagen DOT co DOT uk. by the way, but i regulary go over my host servers disk space allowance, and loose mails, then when it goes over the bandwith allowance i get nowt for the rest of the month... but at least when that heppens they bounce the mails, over disk space it just deletes them.

Ahh right, think i just about understand that, the tone board is totaly missing from my machine, just got the painted wire designations left on the wooden base where it would have gone,

i've just been up and looked at the base board of the machine, heres what is written where the tone board would go...

8 dots representing the inputs, from left to right.... 0, 28, (under those two is written '28V AC') next 2 are speaker output, then D, A, C, B, and under them 'Sound'

The machine runs all it's coils, target contacts etc on 28 volts, (can change the tap for the flippers and bumpers between 28, 30 or 32 volts)

the lights run on 7 volts AC,

it has a bridge rectifier in the machine, but that's used to run the solenoid coils for the flippers and pop bumpers to make them quicker and stronger than if they were run on AC apparantly.

this photo

may help a little or may not, bottom left of the base, that's the sound board, i can see some big (sand?) resisters, few largish capacitors, 3 ic's etc, also can see only 3 inputs are used for the tones even though the board can make 4, coresponds to the 3 input wires i have in my machine, 4th score tone is a large gong bell.

excelent, sorry for just assuming it was positive inputs to trigger the tones,

i've just taken some voltage readings on the wires, there's 30.1 volts AC between the 28 and 0 volt input, connecting the negative lead of my multimeter to the 0 volt wire, and the positive lead to one of the trigger wires, hitting the relevent score target results in a 30.1 volt AC pulse on that wire, it's the same on all 3 of the trigger wires, an AC pulse to trigger the relevent tone.

that seems to throw a spanner in the works :( or does it, the +28 volts goes to earth in the board, so could i have been reading a negative signal from the input wires by using the black 0 volt wire to complete the circuit? or have i just complicated thing even more by not doing the measurments right.

This circuit doesn't have any provision for ringing - i.e., it will make beeps and boops. You might be better off starting off from scratch - are you any good with micros? Otherwise, you'd have to come up with some damped oscillators.

Good Luck! Rich

ahh right, cheers for that,

i might have a go at building the board just for the fun and experiance of it, providing i can get all the parts,

im not really any good with much electronics stuff, can solder, make pcb's, and make a circuit up from a diagram, but never programmed any chips or owt like that, tho i am interested in learning how to, as there are a few little projects that use pics that i'd like to make.

would really like a ding dang dong sounding circuit, i could just track down a set of electro mechanical chimes, but i like the idea of the electronic sounds, not least because the volume can be adjusted for night time playing,

put RC low pass filters on the output of the binary counter so you get

4 triangle waves

swap the quad OR gate for a quad comparitor. scale the voltages from the input capacitors so they peak at the mid-point of the triangle wave and dip to just below the low point of the triange wave.

replace the quad and gate with a quad comparitor.

It probably won't sound pretty but the volume will decrease sort-of exponentially a bit like a gong.

simulating it in lt-spice it produces a wav sounds kind of like 'electric piano'

here's the asc. When run in ltspice it'll produce a file called pinball.wav which you should be able to listen to by clicking it.

Version 4 SHEET 1 1588 680 WIRE 784 -416 768 -416 WIRE 800 -416 784 -416 WIRE 704 -400 640 -400 WIRE 704 -384 704 -400 WIRE 784 -384 784 -416 WIRE 784 -384 704 -384 WIRE 832 -384 784 -384 WIRE 640 -368 640 -400 WIRE 832 -320 832 -384 WIRE 704 -304 704 -384 WIRE 704 -304 688 -304 WIRE 640 -256 640 -288 WIRE 688 -224 688 -304 WIRE -672 -160 -1424 -160 WIRE 80 -160 -672 -160 WIRE 832 -160 832 -240 WIRE 832 -160 80 -160 WIRE 944 -160 832 -160 WIRE 1584 -160 944 -160 WIRE -1296 -96 -1376 -96 WIRE -1136 -96 -1216 -96 WIRE -944 -96 -1136 -96 WIRE -544 -96 -624 -96 WIRE -384 -96 -464 -96 WIRE -192 -96 -384 -96 WIRE 208 -64 128 -64 WIRE 368 -64 288 -64 WIRE 560 -64 368 -64 WIRE 960 -64 880 -64 WIRE 1120 -64 1040 -64 WIRE 1312 -64 1120 -64 WIRE -1376 -48 -1376 -96 WIRE -1136 -48 -1136 -96 WIRE -624 -48 -624 -96 WIRE -384 -48 -384 -96 WIRE 128 -16 128 -64 WIRE 368 -16 368 -64 WIRE 880 -16 880 -64 WIRE 1120 -16 1120 -64 WIRE -816 48 -832 48 WIRE -800 48 -816 48 WIRE -64 48 -80 48 WIRE -48 48 -64 48 WIRE -1376 64 -1376 32 WIRE -1136 64 -1136 16 WIRE -624 64 -624 32 WIRE -384 64 -384 16 WIRE 688 80 672 80 WIRE 704 80 688 80 WIRE 1440 80 1424 80 WIRE 1456 80 1440 80 WIRE -816 96 -816 48 WIRE -64 96 -64 48 WIRE 128 96 128 64 WIRE 368 96 368 48 WIRE 880 96 880 64 WIRE 1120 96 1120 48 WIRE -848 112 -912 112 WIRE -96 112 -160 112 WIRE -1296 128 -1312 128 WIRE -1136 128 -1136 112 WIRE -1136 128 -1216 128 WIRE -1008 128 -1136 128 WIRE -672 128 -672 -160 WIRE -672 128 -784 128 WIRE -544 128 -560 128 WIRE -384 128 -384 112 WIRE -384 128 -464 128 WIRE -256 128 -384 128 WIRE 80 128 80 -160 WIRE 80 128 -32 128 WIRE 688 128 688 80 WIRE 1440 128 1440 80 WIRE -944 144 -944 -96 WIRE -848 144 -944 144 WIRE -192 144 -192 -96 WIRE -96 144 -192 144 WIRE 656 144 592 144 WIRE 1408 144 1344 144 WIRE -1008 160 -1008 128 WIRE -256 160 -256 128 WIRE 208 160 192 160 WIRE 368 160 368 144 WIRE 368 160 288 160 WIRE 496 160 368 160 WIRE 832 160 832 -160 WIRE 832 160 720 160 WIRE 960 160 944 160 WIRE 1120 160 1120 144 WIRE 1120 160 1040 160 WIRE 1248 160 1120 160 WIRE 1584 160 1584 -160 WIRE 1584 160 1472 160 WIRE -1376 176 -1376 128 WIRE -1136 176 -1136 128 WIRE -624 176 -624 128 WIRE -384 176 -384 128 WIRE 560 176 560 -64 WIRE 656 176 560 176 WIRE 1312 176 1312 -64 WIRE 1408 176 1312 176 WIRE 496 192 496 160 WIRE 1248 192 1248 160 WIRE 128 208 128 160 WIRE 368 208 368 160 WIRE 880 208 880 160 WIRE 1120 208 1120 160 WIRE -1008 256 -1008 240 WIRE -912 256 -912 112 WIRE -912 256 -1008 256 WIRE -256 256 -256 240 WIRE -160 256 -160 112 WIRE -160 256 -256 256 WIRE 496 288 496 272 WIRE 592 288 592 144 WIRE 592 288 496 288 WIRE 1248 288 1248 272 WIRE 1344 288 1344 144 WIRE 1344 288 1248 288 WIRE -1008 432 -1008 336 WIRE -256 432 -256 336 WIRE 496 464 496 368 WIRE 1248 464 1248 368 WIRE -1136 560 -1136 240 WIRE -1008 560 -1008 512 WIRE -1008 560 -1136 560 WIRE -816 560 -816 160 WIRE -816 560 -1008 560 WIRE -384 560 -384 240 WIRE -256 560 -256 512 WIRE -256 560 -384 560 WIRE -64 560 -64 160 WIRE -64 560 -256 560 WIRE -1376 576 -1376 256 WIRE -1136 576 -1136 560 WIRE -624 576 -624 256 WIRE -384 576 -384 560 WIRE 368 592 368 272 WIRE 496 592 496 544 WIRE 496 592 368 592 WIRE 688 592 688 192 WIRE 688 592 496 592 WIRE 1120 592 1120 272 WIRE 1248 592 1248 544 WIRE 1248 592 1120 592 WIRE 1440 592 1440 192 WIRE 1440 592 1248 592 WIRE 128 608 128 288 WIRE 368 608 368 592 WIRE 880 608 880 288 WIRE 1120 608 1120 592 FLAG 128 96 0 FLAG 368 96 0 FLAG 128 608 0 FLAG 368 608 0 FLAG 640 -256 0 FLAG 784 -416 vcc FLAG 688 80 vcc FLAG 944 -160 OUT FLAG -624 64 0 FLAG -384 64 0 FLAG -624 576 0 FLAG -384 576 0 FLAG -64 48 vcc FLAG -1376 64 0 FLAG -1136 64 0 FLAG -1376 576 0 FLAG -1136 576 0 FLAG -816 48 vcc FLAG 880 96 0 FLAG 1120 96 0 FLAG 880 608 0 FLAG 1120 608 0 FLAG 1440 80 vcc SYMBOL Misc\\\\signal 128 -32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value PULSE(0 5 0 0 0 .0005 .001) SYMBOL res 304 -80 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R2 SYMATTR Value 860R SYMBOL cap 352 -16 R0 SYMATTR InstName C1 SYMATTR Value 0.5µf SYMBOL Misc\\\\signal 128 192 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value PULSE(0 5 1.2 0 0 .01 1K) SYMBOL res 304 144 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value 300R SYMBOL cap 352 208 R0 SYMATTR InstName C2 SYMATTR Value 2µf SYMBOL diode 128 176 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D1 SYMBOL res 480 176 R0 SYMATTR InstName R3 SYMATTR Value 33K SYMBOL res 480 272 R0 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL Comparators\\\\LTC1841 688 160 R0 SYMATTR InstName U1 SYMBOL Misc\\\\battery 640 -384 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 5 SYMBOL res 816 -336 R0 SYMATTR InstName R5 SYMATTR Value 100K SYMBOL Misc\\\\battery 496 448 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V8 SYMATTR Value 1.33v SYMBOL Misc\\\\signal -624 -64 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V4 SYMATTR Value PULSE(0 5 0 0 0 .00025 .0005) SYMBOL res -448 -112 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R6 SYMATTR Value 860R SYMBOL cap -400 -48 R0 SYMATTR InstName C3 SYMATTR Value 0.25µf SYMBOL Misc\\\\signal -624 160 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V5 SYMATTR Value PULSE(0 5 2.2 0 0 .01 1K) SYMBOL res -448 112 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R7 SYMATTR Value 300R SYMBOL cap -400 176 R0 SYMATTR InstName C4 SYMATTR Value 2µf SYMBOL diode -624 144 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D2 SYMBOL res -272 144 R0 SYMATTR InstName R8 SYMATTR Value 33K SYMBOL res -272 240 R0 SYMATTR InstName R9 SYMATTR Value 10K SYMBOL Comparators\\\\LTC1841 -64 128 R0 SYMATTR InstName U2 SYMBOL Misc\\\\battery -256 416 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V6 SYMATTR Value 1.33v SYMBOL Misc\\\\signal -1376 -64 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V7 SYMATTR Value PULSE(0 5 0 0 0 .000125 .00025) SYMBOL res -1200 -112 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R10 SYMATTR Value 860R SYMBOL cap -1152 -48 R0 SYMATTR InstName C5 SYMATTR Value 0.125µf SYMBOL Misc\\\\signal -1376 160 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V9 SYMATTR Value PULSE(0 5 3.2 0 0 .01 1K) SYMBOL res -1200 112 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R11 SYMATTR Value 300R SYMBOL cap -1152 176 R0 SYMATTR InstName C6 SYMATTR Value 2µf SYMBOL diode -1376 144 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D3 SYMBOL res -1024 144 R0 SYMATTR InstName R12 SYMATTR Value 33K SYMBOL res -1024 240 R0 SYMATTR InstName R13 SYMATTR Value 10K SYMBOL Comparators\\\\LTC1841 -816 128 R0 SYMATTR InstName U3 SYMBOL Misc\\\\battery -1008 416 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V10 SYMATTR Value 1.33v SYMBOL Misc\\\\signal 880 -32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V11 SYMATTR Value PULSE(0 5 0 0 0 .001 .002) SYMBOL res 1056 -80 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R14 SYMATTR Value 860R SYMBOL cap 1104 -16 R0 SYMATTR InstName C7 SYMATTR Value 1.0µf SYMBOL Misc\\\\signal 880 192 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V12 SYMATTR Value PULSE(0 5 .2 0 0 .01 1K) SYMBOL res 1056 144 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R15 SYMATTR Value 300R SYMBOL cap 1104 208 R0 SYMATTR InstName C8 SYMATTR Value 2µf SYMBOL diode 880 176 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D4 SYMBOL res 1232 176 R0 SYMATTR InstName R16 SYMATTR Value 33K SYMBOL res 1232 272 R0 SYMATTR InstName R17 SYMATTR Value 10K SYMBOL Comparators\\\\LTC1841 1440 160 R0 SYMATTR InstName U4 SYMBOL Misc\\\\battery 1248 448 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V13 SYMATTR Value 1.33v TEXT 478 -336 Left 0 !.tran 4 TEXT 288 -296 Left 0 !.wave pinball.wav 16 44000 V(out) TEXT 48 -384 Left 0 ;Pinball synthesizer

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Bye.
   Jasen