Show Posts
Pages: [1] 2
1  Using Arduino / General Electronics / Re: Good Solder Wire on: November 28, 2011, 09:37:36 am
Location Updated  smiley-grin - Israel.
I don't need lead free solder, regular is fine.

I used liquid flux in the past and it improves the soldering's quality A LOT!
with flux, the soldering points are nice and round.
Why do you think I don't need liquid flux?

2  Using Arduino / General Electronics / Good Solder Wire on: November 28, 2011, 02:26:24 am
Hello all!
I need to buy solder and I wonder where can I find online some good solder with good prices.
I don't need the most expensive one but a reasonable one. I saw kester solder which I understand is the best but it's quite expensive.
Can you please recommend a good site with good prices that ships internationally (with good shipping rates...) ?
I would also like to order liquid flux and desoldering braid and I prefer they all will be bought at the same site...

3  Using Arduino / General Electronics / Re: Starting a golf cart using Arduino (EZ-Go) - powering a LARGE DC motor on: November 26, 2011, 06:58:58 am
I posted a thread here:

and the people there tell me it's low current, it's starting the circuit that moves the solenoid according to the pedal press... or that's what I understood...  smiley-confuse

does it help to tell which circuit suits for that?

is a regular relay good for that?
I have a relay that can hold up to 30v and 10A but considering the current there is low (let's say 2-3A) will it be enough? or becuase it's a 30v relay it will probably burn?
4  Using Arduino / General Electronics / Re: Starting a golf cart using Arduino (EZ-Go) - powering a LARGE DC motor on: November 23, 2011, 01:50:18 pm
Does anyone have any idea?
5  Using Arduino / General Electronics / Re: Velleman K8064 interfacing with Arduino on: November 23, 2011, 05:32:25 am
6  Using Arduino / General Electronics / Re: Starting a golf cart using Arduino (EZ-Go) - powering a LARGE DC motor on: November 23, 2011, 05:32:00 am

as far as I understand, it does hold 36v...
can someone please provide a circuit using the TIP142 mosfet (or irf540/irfz44) that can control this switching digitally using an Arduino?

7  Using Arduino / General Electronics / Re: Starting a golf cart using Arduino (EZ-Go) - powering a LARGE DC motor on: November 23, 2011, 04:04:25 am
please read the replies...
does this mean that the key switch does have 36v?

and there's also this one:

if that means it has 36v, then again, I need something to switch it...
any help with the circuit will be much helpful!!!
8  Using Arduino / General Electronics / Re: 3.3v logic to 5v logic on: November 23, 2011, 03:27:10 am
you can also use this one...
9  Using Arduino / General Electronics / Re: Starting a golf cart using Arduino (EZ-Go) - powering a LARGE DC motor on: November 23, 2011, 02:58:16 am
Thank you very much!

But considering the key switch is connected to the battery charge meter showing batteries status, doesn't it mean it is connected directly to the Batteries?

10  Using Arduino / General Electronics / Starting a golf cart using Arduino (EZ-Go) - powering a LARGE DC motor on: November 22, 2011, 05:52:46 pm
Hello all!

I have an EZ-Go electric Golf Cart which I would like to "start" using an Arduino.
The golf cart has 6 batteries of 6v which is 36v total.
It has a key switch with starts the motor.

I would like to trigger the motor ON or OFF using an Arduino's output. for now it's going to be a button but later it's going to be some remote control so I won't have to put the key inside the key switch and can start it by triggering remotely.
I want to connect the circuit in parallel to the existing key switch so I can still start it with the key.

I DON'T need to control the speed or drive the motor from the Arduino for it's been done using the "gas" pedal.
I just want to trigger it - ON or OFF.

I'm not sure whether all the load of the DC motor is running thorough the wires going to the key switch, but considering it does, I need to find the right circuit.
I have TIP142 mosfets at home which are 100v and 10A.
If all the load is running through that key switch I guess that on full load the current will be more than 10A.
Considering that, I could also order irf540 or irfz44 from ebay...
I would like it to be opto-isolated so it won't risk my Arduino board and be maximum safe both for my Arduino and my golf cart.

I found this PCB but first of all it's 4 circuits which is kind of an overkill for that and second of all the circuit is a little blurry to me:
what are the X1-1 and X1-2?
What is Vpp?
are the Grounds of the circuits connected?
I also have 4n25 at home. Is it good enough instead of the 4n35?

There's also this circuit (which is different):,20358.0.html

On the other end, there's this guy who connected it directly from the Arduino's output.,70150.30.html

So as you can see I'm a bit confused.

I would like your advice people about which circuit should I use to do that.
Could you please provide schematics for the circuit because I'm not very good with electronics...
Does someone knows if the full load of the golf cart is running through the key switch (I think the battery's charge display is serially connected with the key switch but I'm not sure. I'm also not sure if that means anything).

Could I use power supply from the golf cart's battery to power the Arduino and the mosfet circuit?

If someone did build this kind of circuit and can advice it will be great!!!

Thank you all in advance!
11  Using Arduino / General Electronics / Velleman K8064 interfacing with Arduino on: November 21, 2011, 03:41:27 am
Hello All!
I've got a Velleman K8064 and I would like to interface it with the Arduino.
I tried to find it here in this post

but the link to Meriol Lehmanns's blog that contains the circuit is no longer valid.

Can someone please provide this circuit?

Thanks in advance!

12  Using Arduino / General Electronics / Re: controlling 12v and 220v circuits on: February 10, 2011, 05:59:26 am
I think I didn't make myself clear...
I want the lights to be dimmable, so I cannot use a relay.
Gorbs, I can use your circuit with relays for trigerring a garden watering system or even a shower boiler but not for dimming lights.

and Mike, that SSR costs almost a $100 A PIECE...
I'm sure there's a way to build one, much much cheaper...
I need your help, all the electronics geeks...  smiley

I need something like this:

I know this one is very dangerous but all I need is the circuit, and I'll buy the components and build it myself inside a closed box.
What I need is the circuit sketch and list of components.

13  Using Arduino / General Electronics / controlling 12v and 220v circuits on: February 09, 2011, 05:20:47 pm
Hello All!
(hope I'm posting it on the right forum...)

I'm planning an Home Automation system using the Arduino Board.
I looked A LOT around the internet and still couldn't find specifically what I was looking.
I need two things which are theoretically pretty similar but I know they are not... (different electronics).
I'm interested in using the Arduino to trigger a 12v circuits in order to connect 3w/10w RGB LEDs (for "mood" light) using an external power source (so I can control many of them).
a sample of something like this is this:
I guess it shouldn't be that difficult and I rather build this than buy this... (cheaper and MORE FUN!).

The second thing is doing the same but with a regular 220v Incandescent light bulb, so I can control my home lights.
I know I should be using an SSR but I also understand that an SSR alone cannot do the job because It has to be connected to some circuit that identifies Zero-Crossing for it to work well.
I know all about being careful dealing with high voltages.
I guess there is no problem using an external TLC5940 to get more PWM exits for controlling more outputs. the Arduino should only be the trigger.

I wandered all around different electronics sites, Arduino sites and more and couldn't find a SPECIFIC circuit (and a sketch). in each of the sites there are many different recommendations and on every reply that someone wrote, there are at least 2 other replies saying that is should be different.
Like I said, nothing specific... (I'm sure there are, but couldn't find'em).

I would be more than happy if someone can guide me and share some sketches of working (or known as working) circuits and components I should buy in order to build them.
after all, I'm not looking for "squeezing the juice" out of the Arduino, only controlling other circuit using PWM...
it's only 5v controlling 12v circuit (which I believe is easier).
and a 5v controlling 220v circuit.

Thank You all very much!
14  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Arduino Mega (Arduino NooB) on: January 22, 2011, 08:05:06 am
I have a bit of a problem with X10 products - most of them are working on 110v and I'm using 220v (I'm from Israel).
there are 220v products but they are 3-5 times more expensive than the 110v ones...
I found a way to modify them in order to make'em suitable for 220v but I think it will take a lot of time an effort...
isn't there a simpler way of controlling and dimming light (beside X10) or is it the cheapest and easiest one?

the link you gave with the X10 rs232 device, is it something similar to this one?

because if so, there's already a library for that using this psc05/tw523 device...

something else - most of the shields, when you install them on the Arduino card, also give you access to the I/O or analog connections.
my question is, are those connections still can be used or they are just there for being like Test Points (for taking voltage readings and stuff) ?
because I think the shield is supposed to use these connections for whatever his role is, right?
15  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Arduino Mega (Arduino NooB) on: January 21, 2011, 12:00:20 pm
I see... that is a good idea considering you can get the cheap Arduino's for about 25-30$.

sorry, but English is not my mother tongue so there are some phrases I'm not familiar with, like what you mean when you say it's better I'll use "thin clients"? you mean low-level computers or something else?

beside that, by "off the shelf products" you mean like X10 products?
Pages: [1] 2