DIY driverboard questions

Vcent · Dec 22, 2007

Hi,I`ve bought Daedal's driver circuit over senkat,and i have got a few questions...
1.Is it possible to supply it from a 9v block,since cr123 aren't very common here in Denmark,
2.Why is the PCB board full of lines around the holes(might sound stupid,but i have no experience with PCB boards,could be they are connected or so)?

Skram0 · Dec 22, 2007

1. You should be able to feed it up to around 37volts if you wanted. But with that power, you'd need a heat sink for all the unused or used voltage. 9 volts is okay. It'll get warmer as you start to draw more than 80mA.
2. ??

Vcent · Dec 22, 2007

ahh,nvm about nr. 2,does anyone know why there are 2 10ohm resistors in the kit?

Skram0 · Dec 22, 2007

Probably if you wanted to set your maximum power limit to either 150mA (1 10ohm), or 300mA (2 10ohms in parallel), or 75mA (2 10ohms in series). So you have resistance levels of either 10, 5, or 20 ohms respectively.

Vcent · Dec 22, 2007

lol...when i supply it with 9v the ma measurement reads 250(The max on my device) in an instant...d'oh!
gotta get a battery holder or something,if i am not mistaken its normal to drive it on 4 1,5 AA or equivalent?(Its always positive to see that i am actually getiing this far...having everything soldered correctly up...

) ;D

a_pyro_is · Dec 22, 2007

Skram0 said:
Probably if you wanted to set your maximum power limit to either 150mA (1 10ohm), or 300mA (2 10ohms in parallel), or 75mA (2 10ohms in series). So you have resistance levels of either 10, 5, or 20 ohms respectively.

Actually, that's:

1.25V / 10 Ohms = .125A = 125mA
1.25V / 5 Ohms (that's two 10 Ohm resistors in parallel) = .250A = 250mA
1.25V / 20 Ohms (that's two 10 Ohm resistors in series) = .0625A = 62.5mA

a_pyro_is · Dec 22, 2007

Vcent said:
lol...when i supply it with 9v the ma measurement reads 250(The max on my device) in an instant...d'oh!
gotta get a battery holder or something,if i am not mistaken its normal to drive it on 4 1,5 AA or equivalent?(Its always positive to see that i am actually getiing this far...having everything soldered correctly up... ) ;D

If you built it with the two resistors in parallel the current will be limited to 250mA. But if you're using a PP3 type 9V battery, the voltage will sag after just a few seconds of use and you'll start losing power.

Don't use four 1.5V alkaline cells as they will have the same problem. Much better to use 2 LiIon cells or 6 NiMH / NiCd / Alkaline cells.

Vcent · Dec 23, 2007

hm...probably going to run it with my psp adapter,if it(The driver) can handle 5v@2000ma
btw i have no idea what a pp3 type 9v is... ^^ im using a Duracell 9v block battery...

Skram0 · Dec 23, 2007

a_pyro_is said:
[quote author=Skram0 link=1198281877/0#3 date=1198289044]Probably if you wanted to set your maximum power limit to either 150mA (1 10ohm), or 300mA (2 10ohms in parallel), or 75mA (2 10ohms in series). So you have resistance levels of either 10, 5, or 20 ohms respectively.

Actually, that's:

1.25V / 10 Ohms = .125A = 125mA
1.25V / 5 Ohms (that's two 10 Ohm resistors in parallel) = .250A = 250mA
1.25V / 20 Ohms (that's two 10 Ohm resistors in series) = .0625A = 62.5mA[/quote]
Ah crap. Thanks for the correction. Somehow I though it was 1.5. Woops..

Vcent said:
btw i have no idea what a pp3 type 9v is... ^^ im using a Duracell 9v block battery...

http://en.wikipedia.org/wiki/9_volt_battery
"However PP3 refers to the type of connection that is on top of the battery or snap."

Vcent · Dec 23, 2007

ahhh,thanks for clearing the battery issue up

looks like im using a pp3 ^^
oh,well,im using ONE 10ohm resistor,and im still getting 250+ ma even with pot all the way up,any ideas?
*edit : how should i set my measurement device @?mA;DC mA or...?*
*edit2 : i've got a 6volt battery,looks like 2 cr123's,still getting 250+ mA...although @ DC mA it is around 100...*

a_pyro_is · Dec 23, 2007

Vcent,
Check my post here. Take a look at the links there, I think you'll find the info you need. If not, just PM me.

*Edit*
I say this because I don't think you have your regulator wired correctly.

Vcent · Dec 23, 2007

Well...i misunderstood daedals schematic/prototype board...so the circuit is faulty,putting a pic up so anyone with the same problem can see ^^
the picture was actually taken with a 10megapixel cam...LOL!
BTW:The circuit works,i don't know how that is possible but its letting electricity trough,but it would kill your diode anyways...off i go desolder & resolder...
(i hope the photoshopping is ok,i suck at drawing,but im pretty good normally in photoshop

)

Gazoo · Dec 23, 2007

Hello Vcent,
There is a pictorial diagram floating around the forum and I believe it is very helpful and self explanatory. Using it along with the links a_pyro_is posted, everything should be more clear for you. The regulator needs a minimum of 6 volts to operate properly. One of the easiest ways to power the circuit is to use 6 nimh or alkaline batteries. Your PSP adapter will not work since it is only 5 volts.

Vcent · Dec 24, 2007

Well,i was asked to post a clearer pic of my circuit,but im afraid thats impossible,since there are so many little shiny things that reflect the light back @ the camera,its one mess...(how does Daedal manage to get so crystal clear pictures?!?)
BtW: my multimater can handle DC mA...although its rather old^^ (Hung chen HC-213)
This is the best i could manage :

BlueFusion · Dec 25, 2007

Try taking it from an angle so the light reflects away from the camera. Also try manual focus man!

Vcent · Dec 25, 2007

BlueFusion said:
Also try manual focus man!

HAHAH!

The Samsung digimax s1000 is like the most user friendly camera ever ^^
i cant even adjust focus ^^ everything is auto this an auto that...argh...my cell takes better pictures than that ;D
just a shame ive lost the converter for its memory stick...

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