Search found 47 matches

by Barx
Sat Apr 09, 2011 9:37 am
Forum: SparkFun Site Questions/Comments
Topic: Nintendo DS Touchscreen & Arduino
Replies: 11
Views: 7366

Re: Nintendo DS Touchscreen & Arduino

Your almost 2 years late with that reply mate. Think he would have either sorted it or gave up by now. Good try though.
by Barx
Wed Oct 27, 2010 12:44 pm
Forum: SparkFun Product Questions
Topic: 8 x 8 led matrix question
Replies: 9
Views: 1586

Re: 8 x 8 led matrix question

Wow, thanks for that eric. As per either you or tecoist foil my plans and blow my theory out the window. Back to the drawing board. I had 4051's in mind after watching this video. After reading this and some similar pages, I assumed S0, S1 and S2 could share signals. And, by 'Data' I just meant a 1 ...
by Barx
Wed Oct 27, 2010 8:42 am
Forum: SparkFun Product Questions
Topic: Led Matrix - Shift Register, Multiplexer or both?
Replies: 2
Views: 1571

Re: Led Matrix - Shift Register, Multiplexer or both?

Thanks Mike. Some food for thought. Time I stopped asking questions and started tinkering now. Lets see what I blow up first. :wink:
by Barx
Tue Oct 26, 2010 9:48 am
Forum: SparkFun Product Questions
Topic: Led Matrix - Shift Register, Multiplexer or both?
Replies: 2
Views: 1571

Led Matrix - Shift Register, Multiplexer or both?

Hi chaps, the local n00b here. Going to be playing with my new 8 x 8 bi-colour LED Matrix. I've looked into ways used to multiplex the LED's and some people use shift registers like the '595'. Others use Multiplexers/Demultiplexers like the 4051. I've been trying to think which would be best. I thou...
by Barx
Sun Oct 24, 2010 9:06 am
Forum: SparkFun Product Questions
Topic: 8 x 8 led matrix question
Replies: 9
Views: 1586

Re: 8 x 8 led matrix question

Realised I cant drive the matrix direct and do 2 colour. I've had a look around and dropped on the 4051 8 channel multiplexer/demultiplexer. My thoughts are. 3 of these, 1 to select row, 1 for Column Red other for Column Green. So when doing code trickery it's a matter of selecting row and outputtin...
by Barx
Sun Oct 24, 2010 1:16 am
Forum: SparkFun Product Questions
Topic: 8 x 8 led matrix question
Replies: 9
Views: 1586

Re: 8 x 8 led matrix question

Sussed it out. Common anode. Not sure if thats good or bad, Sure I will soon find out. Would have thought it would have to be common cathode for use with arduino, But not got my head round it yet so could be talking babble.

Thanks for the info.
by Barx
Sat Oct 23, 2010 1:42 pm
Forum: SparkFun Product Questions
Topic: 8 x 8 led matrix question
Replies: 9
Views: 1586

Re: 8 x 8 led matrix question

Looks 'like' it but its not 'it'. Here is the fella. Its bi colour, has 24 pins. Using this page, I can assume the pinout is same as the 8 x 8 bicolour matrices but smaller scale unit (mine is <40mm). It's just a matter of common anode or common cathode. I have mailed the seller and will wait a few ...
by Barx
Sat Oct 23, 2010 1:34 pm
Forum: Arduino
Topic: Arduino header spacing.
Replies: 5
Views: 6238

Re: Arduino header spacing.

Wow, the offset headers are bloody hard to find here in the UK. The search will continue in the morning...
by Barx
Sat Oct 23, 2010 12:48 pm
Forum: Arduino
Topic: Arduino header spacing.
Replies: 5
Views: 6238

Re: Arduino header spacing.

Well that explains that one then. Thanks chaps. Thought it was strange like.
by Barx
Sat Oct 23, 2010 11:53 am
Forum: SparkFun Product Questions
Topic: 8 x 8 led matrix question
Replies: 9
Views: 1586

8 x 8 led matrix question

Bought an led matrix (off the eBay). Is there a part of the code to tell me whether it's common anode or cathode. On the side it's got 1088DEG 33 M2. On the bottom seen through the resin is WLG B1088.

Thanks
by Barx
Sat Oct 23, 2010 9:58 am
Forum: Arduino
Topic: Arduino header spacing.
Replies: 5
Views: 6238

Arduino header spacing.

Not really post for help. More a statement expressing my thoughts. I've just got a new arduino Uno and a proto shield. I had plans on making circuits to use with the arduino on strip/matrix board and using standard single header pins to line up with the arduino. To my suprise, the arduino headers do...
by Barx
Sat Oct 16, 2010 9:09 am
Forum: SparkFun Product Questions
Topic: Current transformers
Replies: 7
Views: 1050

Re: Current transformers

I was kind of hoping for that effect and was going to try it without. The current it will be detecting will be >10 amps and the CT is 20 amp max. So was hoping it would kick out 2-3 volts. loose a bit though diodes still gives me 1.5 - 2 volts to detect with adc. Kind of hoping this will rule out fa...
by Barx
Sat Oct 16, 2010 8:08 am
Forum: SparkFun Product Questions
Topic: Current transformers
Replies: 7
Views: 1050

Re: Current transformers

Thanks jksoft. I've decided to use a small 220 ohm pot as the burden resistor to allow me to 'tweak' the output voltage (well thats my theory, probably got wrong end of stick as usual) and then run through a full rectifier made from 1n4002 diodes that I have laying around. I will leave room for a sm...
by Barx
Thu Oct 14, 2010 10:29 pm
Forum: SparkFun Product Questions
Topic: Current transformers
Replies: 7
Views: 1050

Re: Current transformers

Not looking to measure it, Just trying to tell whether current is flowing or not. So, the CT has 2 leads. black and grey and on top it says black is ground. Say I decided to use an arduino. I connect black to ground. Then put a resistor in series with the grey into either a recifier or straight into...
by Barx
Thu Oct 14, 2010 12:19 pm
Forum: SparkFun Product Questions
Topic: Current transformers
Replies: 7
Views: 1050

Current transformers

In relation to my 'monitoring temperatures > 100c' post. I have decided to get a current transformer to detect when the heater element is on (drawing current). It's a MI20 if that helps. Any tips on how to use it. It will either be hooked up to either a pic or arduino. More likely the latter if I ca...