Another "What can I do with all of these IC's?" thread

[xixiviii]

Hi guys,

A friend of mine that had taken some various electronics classes over the years gifted me a bunch of his stuff.  After sorting through it for hours and pulling out the transistors and IC's that I am familiar with I am left with the following list.  My main interest is stompboxes, however I am not opposed to building something for fun such as electronic dice or any of the Velleman kit type of circuits.

My problem...

I am a bit fried searching these while trying to find practical uses for them within stompboxes and was hoping some might look familiar to you.

Anyone have any thoughts on what I could use any of these for?

I tried to somewhat organize them and offer a light description.

As always...thanks in advance for any info.

NAME         QTY   General Description   Pins
7404            1   hex inverter           14
7420                   1   4 input nand gate   14
7493             1   binary counter           14
2206CP           1   function generator   16
2211D           1   tone decoder           14
7442an           1   decimal decoder           14
74HC4016N   1   quad bilateral switch   14
74LS153PC   1   4 input multiplexer   16
74LS174N           1   flip flop                   16
74LS195APC   1   4 bit shift register   16
BC1025           2                              16
BC1041           2                              16
CA3086           1   npn transistor array   14
cd4071           1   cmos b series gate   14
cd4081           1   cmos b series gate   14
DM74LS125AN   1   quad 3 state buffer   14
DM74LS85N   1   4 bit mag comparator   16
HD74LS138P   1   3 to 8 line decoder   16
HD74LS139P   1   2 to 4 line decoder   16
HD74LS27P   1   3 input nor gate           14
HD74LS30P   2   8 input nand gate   14
HD74LS47P   2   7 seg decoder           16
HD74LS500P   1   balanced modulator   14
HD74LS75P   2   quad bistable latch   16
HD74LS76AP   1   flip flop                   16
HD74LS83AP   2   4 bit binary full adder   16
HD74LS90P   1   decade counter           14
HD74LS93P   2   binary counter           14
HM212AH           1                              28
HM6264P-15   1   8 bit ram                   28
LM311P           1   diff comparator            8
LM318N           1   opamp                    8
LM339N           1   quad comparator   14
LM3900N           1   quad opamp           14
MC1496P           2   analog multiplier           14
MC3418P           2   modulator                   16
MC6821P           1   pia                           40
mh7410          1   3 input nand gate   14
sn7408           1   quad 2 input gate   14
SN74151AN   1   multiplexer           16
SN7421N        1   logic gate                   14
sn7432           1   quad 2 input gate   14
SN7474N           2   flip flop                   14
SN7486N        1   quad two input gate   14
SN7489N           1   64 bit ram                   16
SN74LS191N   1   up down counter   16
SN754410NE   1   quad half h driver   16

[greaser_au]

The majority of these ICs have no "conventional" place in stompboxes as such. some of the ..74xx  series may be able to be used in synthesiser/octave effects or as switching control...

the LM ones are likely most useful to you.

david

[knutolai]

could probably use the function generator for a LFO og oscillator. If its got sine output you could make yourself a test tone box for circuit ..eeh testing

Also you might be able to use the balanced modulator or analog multiplier for a ringmod effect (?)

[Brisance]

I guess the analog multiplier could make a great compressor/distortion

[induction]

The Catalinbread Pareidolia uses an XR2206 function generator, if that's the same thing as 2206CP. Or, yeah, you could use it wherever you want an LFO. Try here for more ideas.

Some folks use multipliers for 'clean' octaves, with varying degrees of ugliness in the result. It's worth playing around with, I think.

[Luke51411]

I think the lm311 is used in madbean's current lover, electric misstres port. That's all I got.

[xixiviii]

Thank you for your inputs so far guys...it's appreciated.

Like I said earlier, I dug out the ones I knew had a place in typical stompbox applications and saved them with my others - the ones above...who knows?

I imagine there are all sorts of random things I could build that aren't stompbox related - maybe that would be a good penalty kill if I get stuck on an effect circuit and need a break.  I have a few inductors and some timing chips in the bin - maybe I should build a metal detector or something.

@induction...good call on the CB Pareidolia with the 2206 - I have a Sabrotone layout of that one that I could try out.

[xixiviii]

I think the lm311 is used in madbean's current lover, electric misstres port. That's all I got.

Dang, you are right.  I got a 324 in the pile from him as well and I already had the 4049, 4013, and the 4558's.

Electric Mistress here we come...

Thanks Luke51411!!!

[induction]

@induction...good call on the CB Pareidolia with the 2206 - I have a Sabrotone layout of that one that I could try out.

Cool. If you build it, there are reports that C10 should be something like 250p rather than the 5n listed. People complain that is sounds thin and trebly with 5n, but sounds like the demos with 250p. I haven't built it, so I can't say. But I thought it was worth mentioning. Check the other forum for more info.

[GibsonGM]

Tone decoder chips can be used in odd tone=generating circuits.  Look for Tim Escobedo's designs around the LM567 tone decoder!

They can also be fun to mess around with, as they'll go high when they 'hear' a tone...lots of uses in the 'lab'.   Some ppl have even recorded scary halloween music with ultra-high tones at certain points (that we can't hear, over 20kHz), and used that to trigger effects to scare the kids!

When I get an 'unknown', sometimes I'll ask a search engine for a project: "HD74LS75P project"  or "HD74LS75P tutorial"  etc.   Mostly you'll find that someone has played with them and put a tutorial or something out there...

[alanp]

The LM3900 is a Norton quad opamp. Don't recall what the difference is, but a lot of Serge circuits use it.

[anotherjim]

The following are probably only of educational value - if you want to learn good old gate logic and don't mind if they get fried.
They're original TTL logic - quite power hungry and 5volt only.
7404            1   hex inverter           14
7420                   1   4 input nand gate   14
7493             1   binary counter           14
7442an           1   decimal decoder           14
mh7410          1   3 input nand gate   14
sn7408           1   quad 2 input gate   14
SN74151AN   1   multiplexer           16
SN7421N        1   logic gate                   14
sn7432           1   quad 2 input gate   14
SN7474N           2   flip flop                   14
SN7486N        1   quad two input gate   14
The ones you have with 74LS in the number are also TTL logic, but lower power, still 5volt only. Useful in sequencers.
HM212AH           1                              28
HM6264P-15   1   8 bit ram                   28
Static RAM useful in sequencers or repair of early digital instruments and digital delays.
MC6821P           1   pia                           40
8 bit Microprocessor i/o port - may be found in early digital instruments.




SN7489N           1   64 bit ram                   16

[Mark Hammer]

The PAiA site has schematics for synth modules and such that use the 3900 and 1496 chips.

[nocentelli]

CA3086           1   npn transistor array   

Five npn bjt transistors, make a nice muff, tonebender, superfuzz etc

[induction]

CA3086           1   npn transistor array   

Five npn bjt transistors, make a nice muff, tonebender, superfuzz etc

True. I made a mkii tonebender with one of those. There's plenty of layouts available. Look for Retro Channel - The Fuzz.