Author Topic: Circuit build help (Read 7645 times)

SixtyninNaMoose · « **on:** July 13, 2011, 12:59:06 PM »

I have pcb circuit that runs a motor operated by a rotary switch. I removed the switch 4 remounting, but messed the pcb and it doesn't work anymore. I need to build a new circuit, but am confused as to what all the parts are can you help?

frenulem - No.5417 · « **Reply #1 on:** July 13, 2011, 01:06:38 PM »

Here ya go, lemme find that cap name

SixtyninNaMoose · « **Reply #2 on:** July 13, 2011, 01:12:07 PM »

thnx, do know how that circuit is layed out? not quit sure how it works.

frenulem - No.5417 · « **Reply #3 on:** July 13, 2011, 01:15:41 PM »

unfortunately i cant do that, a little complex for me lol

SixtyninNaMoose · « **Reply #4 on:** July 13, 2011, 01:23:56 PM »

ok, thanks for the help. I'll try removing the parts to get a better look at the board, maybe see all the paths. do you what size the transistors and what not are, so i can buy back ups?

frenulem - No.5417 · « **Reply #5 on:** July 13, 2011, 01:39:01 PM »

they have part numbers on them, so if you google them that would lead you in the right direction

SixtyninNaMoose · « **Reply #6 on:** July 13, 2011, 01:40:00 PM »

ok, I'll check that out thanks.

SixtyninNaMoose · « **Reply #7 on:** July 13, 2011, 02:11:20 PM »

rodent,

the switch has 5-pins and the motor has 3 speeds, its a 6v system.
You a cicuit layout that will replace my broken pcb? I can make it myself just dont know how its all connected.

Rodent · « **Reply #8 on:** July 13, 2011, 02:22:37 PM »

sorry dont have a clue, got a pic of what you want to fix? wish i could help just not that experianced with this that much learning very very slowly. all new to me.

SixtyninNaMoose · « **Reply #9 on:** July 13, 2011, 08:43:07 PM »

You know of anybody on acidmods who could possibly help?

Rodent · « **Reply #10 on:** July 13, 2011, 09:01:07 PM »

FOOKZ or HYPER999 maybe they are good at what they do,

FOOKz™ · « **Reply #11 on:** July 13, 2011, 10:12:26 PM »

What exactly does the circuit belong to?

im guessing that since the switch has 3 speeds and theres 5 pins to the switch theres only 1 unused pin... the switch has a common and 3 pins that goes to 3 separate resistors which controls the power transistor (big one with the hole).

just 1 thing i can't really make out is the part number of that big transistor... i am unsure of what that could be.

SixtyninNaMoose · « **Reply #12 on:** July 13, 2011, 10:29:43 PM »

a dc motor that moves an back n forth for a back massager.
I'm quite sure sure what most of it is. Do know of a good layout that can do the same thing.
oh and also it runs on 4 c batteries but want to replace it with a dc power supply.

FOOKz™ · « **Reply #13 on:** July 13, 2011, 10:32:04 PM »

ok this is a circuit i found on google images and I modified it to what you need it to do.

right now im procrastinating i have work to do LOL. i hope i helped a bit man.

1TONpete · « **Reply #14 on:** July 16, 2011, 05:15:16 AM »

I get the circuit, do you need more help w this moose, I seen you had some questions in the shout last night.

SixtyninNaMoose · « **Reply #15 on:** July 16, 2011, 12:36:10 PM »

No I figured out a new circuit, I'n going to try it today. I'll tell if it works. You figure anything out with using the trackball for aiming?
Thnx Denali.

1TONpete · « **Reply #16 on:** July 16, 2011, 03:50:27 PM »

Not yet on trackball, just got a quick successful test on dpad. I got some of the best guys on it tho.
I picked up a breadboard for your stuff and am working on your toe stuff now.

SixtyninNaMoose · « **Reply #17 on:** July 16, 2011, 08:56:59 PM »

Drew this last night

1TONpete · « **Reply #18 on:** July 16, 2011, 09:27:09 PM »

maybe uncertain on the resistor needed..

FOOKz™ · « **Reply #19 on:** July 17, 2011, 06:27:01 AM »

Guys, wait. What kind of motor is this?

IF you're running resistors with that high of a value in series with a low resistance motor I believe that you will drop most of the voltage across the resistors therefore the motor won't get enough voltage to run.

I just measured a motor i had in a box of parts and most of them were around 15 to 30 Ohms of resistance.
Take this into consideration: 32K Ohms is the same as 32,000 and compare that to 30.... 32,000 to 30 ratio... which one will drop the most voltage... the 32K resistor. So i dont think that the motor is gonna spin at all but its worth a shot. All as i'm saying is maybe lower the resistance for each and i think you'll be ok.

1TONpete · « **Reply #20 on:** July 17, 2011, 06:30:40 AM »

The circuit he drew up , he said , he got full power w those resistors , so I am thinking he needs more resistance?
Moose you recycled the switch correct, did you verify the switch is functioning correctly?

SixtyninNaMoose · « **Reply #21 on:** July 18, 2011, 10:30:51 PM »

I took the resistor off of the messed up circuit ran in-line from 2nd pin to motor. I ran pos on 1st pin and pos from 5th pin to motor. when turned on the 5th worked on full current but 2nd pin had no resistance at all. I think we fried the resistor with soldering iron. I'll check my motors ratings with my multiometer when I get my parts, sometime this week. ordered a variety of resistors to just in case. I'll let you guys know.

Thnx

stan4 · « **Reply #22 on:** July 19, 2011, 12:07:36 AM »

Alright buddy.

Well, resistors might do it, and if you're not gonna power it on batteries anymore there's no concern about wasting power on resistors.

I was looking at your circuit and it looks pretty simple, a couple transistors and a couple resistors, the small transistor is an NPN S9013, which is a general purpose small transistor; the big one is the old NEC 2SA1652 which is an epitaxial NPN 10A low drop motor driver transistor, I can't tell the value of the resistors with the photo quality, also in the pictures it's hard to see the PCB traces due to the angle of the photo and being blocked by components.

The engineers made the circuit to improve the battery life while driving the motor at different speeds.

If you want to stick with the resistors, I suggest you to measure the resistance of the motor (I assume it has 2 terminals only, although I'm curious about that yellow wire connected to the capacitor), then calculate the proper resistances by ohm's law for the desired load currents.

If you want to remake the original circuit, I just need you to provide some more pictures to see the hidden traces and the colors and part numbers of the components, on the big transistor I got lucky, I could barely see the "52P" at the end.

1TONpete · « **Reply #23 on:** July 19, 2011, 04:57:49 AM »

Thanks for stepping in stan.

stan4 · « **Reply #24 on:** July 19, 2011, 05:26:59 PM »

Quote from: denali31004 on July 19, 2011, 04:57:49 AM

Thanks for stepping in stan.

np, hope it helps.

SixtyninNaMoose · « **Reply #25 on:** July 20, 2011, 04:46:17 PM »

Hey stan, I'm trying to make a circuit that doesn't require so many parts. Using straight resistors will still function right? The yellow wire is the neg from the motor and yes the motor only has two wires. I checked the voltage from the batteries and it gives off 5.7v and it powers the motor at full speed. I used a range of diff sized resistors and the only 1 that was even close allowing current was a 220 ohm and it allowed 1/10v of current, motor didn't work. I'm thinking something below 60 ohm but don't have any, will have to get some.

SixtyninNaMoose · « **Reply #26 on:** July 20, 2011, 04:56:04 PM »

oh i forgot the resistors were 1/2watt, is that good or no?

SixtyninNaMoose · « **Reply #27 on:** July 23, 2011, 08:47:16 PM »

Ok so I got 47ohm, 33ohm and 10ohm resistors and tested the 10k 1st. The resistor got super hot and of course the motor didn't move. So I made a coil out of wire to around 4ohm resistance. It ran the motor at a little less then 1/2 speed, so wired it up to the 2nd pin and straight power to 3rd and of course the ground to the 1st pin of rotory switch. none of the pins worked, so i moved full power to 5th(last) pin and it woorks. So i tried every combination possible and only the 5th & 1st pins function. Conclusion my rotory switch if fubar. Now i'm looking for a pot that is under 10ohm, preferably a slide with 1/4 or 1/6 slide travel.

1TONpete · « **Reply #28 on:** July 23, 2011, 08:48:52 PM »

Good plan. I was wondering weather that switch was any good.

SixtyninNaMoose · « **Reply #29 on:** July 23, 2011, 08:50:21 PM »

you know where i can get a pot specified?

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Author Topic: Circuit build help (Read 7645 times)