para
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« Reply #15 on: September 11, 2007, 01:10:21 PM » |
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hey i fucked up the original layout and shit so you need to use the updated version or you will not be happy. sorry but i just vomited it up from memory yesterday, then checked it today and got it wrong.
sorry if i wasted any ones time
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caress
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« Reply #16 on: September 11, 2007, 01:22:41 PM » |
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"9 times out of 10 I will change most values in a circuit I see elsewhere. " me too, but people bitch if you don’t do the work for them. and no i’m not talking about you caress
steven thanks... :dead: ) anyways, i appreciate the simplicity of the design and much thanks for the skeleton! |
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caress
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« Reply #17 on: September 11, 2007, 01:25:59 PM » |
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hey caress i posted this somewhere else, maybe it will help---
set yourself some easy limits to allow you to experiment with the more important values. like the input DC cap should be around 104 or whatever you like to use, the first resistor to ground can be 100k, the two cutoff pots can be temporarily replaced with 100k resistors so you don’t have to worry about matching two separate pots for now if you don't have a dual, and the res pot can be like a 100k or whatever until you get the last resistor and cap values decided. then once they are set you figure out your final pot values and test the caps for range and your finished.
UPDATED for stupidity !!!
steven stupidity! ha!  |
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para
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« Reply #18 on: September 11, 2007, 01:34:25 PM » |
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i make stupid mistakes all the time its just lame that i share them with everyone. sorry about that
a warehouse in brooklyn. my fucking dream house. i'm envious of everything but the harsh ass winters. i can’t take the cold anymore, but i would never be able to afford to live in ny anyway. good luck with it
steven
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caress
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« Reply #19 on: September 11, 2007, 02:31:45 PM » |
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you could probably afford it (it's actually not too difficult...my rent is pretty damn cheap because it's a shared place and my gf and i split a room), but then again, you might not have enough time for circuit experimenting...there are pros, there are cons.
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caress
phpBB Junior Member
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« Reply #20 on: September 11, 2007, 02:47:26 PM » |
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steven, i'm curious about the mimeo, another gem i might add...
two questions:
1 is the opamp connected to +/- supply?
2 are the neg/pos squares used like a polarized cap in a circuit?
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para
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« Reply #21 on: September 11, 2007, 02:51:58 PM » |
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yes and yes
i thought you had the whole warehouse. i can't stand roommates or neighbors anymore. this is why i said dream house and unaffordable
steven
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caress
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« Reply #22 on: September 11, 2007, 02:54:59 PM » |
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i've got really great, inspiring roommates, no neighbors and my gf and i have a rehearsal room/nerd den, so i'm pretty happy...
and thanks!
the whole place alone........hmmmmm way too much money!
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expanoncolin
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« Reply #23 on: September 11, 2007, 06:50:59 PM » |
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you just have the tabs slid over the edge of the board? interesting. how’s it working out for you? that never even crossed my mind to do that. nice! so now you can use pcb mounted switches and leds and stuff too and still not have to pay like $3 a pot. but are all of your passives and semi’s on the other side of the board? i may have to steal that. but i'm pretty happy with the other idea i stole from you of having a little pcb just for the pots and then a ribbon to the board that is jack mounted. it worked out fantastically well. but i need to start using IDC's for the ribbons, trimming and soldering those bitches takes longer then the passives. no joke. next batch IDC heres the new DG  steven I use a separate PCB like you, with IDC connectors on either end. You just do right angles. Voodoo labs, prophecysound both do pots parallel. -Colin |
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expanoncolin
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« Reply #25 on: September 11, 2007, 10:05:01 PM » |
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Closest is mouser 31vq... but personally I don't like the single circuit board approach because it makes pot placement sort of a pain. Not that having an IDC connector makes it much easier. -Colin |
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para
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« Reply #26 on: September 11, 2007, 10:53:16 PM » |
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right but the extra board can cost more if you're not smart about it. and the single pot approach isn't bad on the design side when doing big things like say a board thats 8 by 6 or something. then you almost have to just to keep from going insane. except the cost for that can go up very quickly. the 90 degree pots that i can find are expensive and have solid shafts so you need to buy set screw knobs or something and the price keeps going up, so the larger the layout the more the cost in that respect as well.
the only way to win is to give up and not do it at all i guess.
oh and i still have no idea what you are talking about with your new pot layout. i'll just have to wait and see it. you lost in saying perp- and para- and 90 and everything like a 100 times. i can wait...
steven
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expanoncolin
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« Reply #27 on: September 12, 2007, 01:15:46 AM » |
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right but the extra board can cost more if you're not smart about it. and the single pot approach isn't bad on the design side when doing big things like say a board thats 8 by 6 or something. then you almost have to just to keep from going insane. except the cost for that can go up very quickly. the 90 degree pots that i can find are expensive and have solid shafts so you need to buy set screw knobs or something and the price keeps going up, so the larger the layout the more the cost in that respect as well.
the only way to win is to give up and not do it at all i guess.
oh and i still have no idea what you are talking about with your new pot layout. i'll just have to wait and see it. you lost in saying perp- and para- and 90 and everything like a 100 times. i can wait...
steven The pot boards I have cost next to nothing, and the board in the STC is covered with enough ICs I don't think right angle ots would fit. I do see your point about being economical though. In the end, the IDC setup works well for me. Here is a rough diagram of how my pots are mounted:
{ }
{ }
{ }
===
|///////|
|\\\\\\\|--_______
The {} is the shaft, = is the bushing, then you see the body \\//, and the lines -- that come off of it are mounted onto the board _____ See, the legs are flat against the board, they don't poke through. -Colin |
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para
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« Reply #28 on: September 12, 2007, 02:04:04 AM » |
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see thats what i though but then i guess i second guessed myself. and that is what i thought was a good idea. the way i did my extra board was to mix it in with the main board and have generic traces run to it and then just used my table top scroll saw to cut them off, so i was just charged for one board - shhhhhhhh - but cutting solder masked boards sucks!
steven
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expanoncolin
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« Reply #29 on: September 12, 2007, 09:39:06 AM » |
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see thats what i though but then i guess i second guessed myself. and that is what i thought was a good idea. the way i did my extra board was to mix it in with the main board and have generic traces run to it and then just used my table top scroll saw to cut them off, so i was just charged for one board - shhhhhhhh - but cutting solder masked boards sucks!
steven Ezpcb encourages paneling boards like that... the way a lot of people do it is by making a line of holes then just snapping it off. Most companies don't mind at all, expresspcb is I think the only company that doesn't want their customers to do it. -Colin |
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