if you need any electronics design,i been designing electronic circuits for near 25 years started at a very young age,right now at work i use all types of sensors for very high precision test in-house test equipment

@ robotmaker : So kind of you to offer your abilities and skills with the group. This is just another example of the great people in this EZ group! If you willgo back in this post I described what I would like to do with Gizmo's eyes. Wiring the center LED, and the bottom six I can do. If you have any ideas or suggestions it would be appreciated. I'm an old school engineer type that believes in "K.I.S.S." (i.e. keep it simple stupid: ). I'm probably making this a whole lot more complicated then need be. I'm just trying to keep as many I/O pins free as possible on the EZ-B. I'd like to be able to remove Gizmo's head, an then life his body off, so I can easily make mods as it develops. I could always use servo exstenions and treat the plugs as quick disconnects if need be. A nice simple battery driven circuit in the head would be great. I'm working on his head this week and will be posting pics soon. Thanks all, Lloyd

from the circuits NEIK did not bad,but on current output I/0 pin is not 40 ma High-Current Sink/source 25 mA/25 mA from data sheet,you will need a mosfet ,very low ohms ,called RDS on you said you are looking to blink them,there are a few idea one is a time circuit few caps and resistors called rc circuit or timing chip like 555 timer ,second is buying a blinking led,3rd is software and depending on what leds you want to blink and other you dont ,will need that info can be done with 1 I/O port,easy way is to buy blinking leds for the ones you want to blink there is a problem using 10 mm leds it does use up current 1 MA LED is a little better 10mm takes up to 20 ma sometimes more off one I/O PIN you can drive many mosfets or a mosfet for each string of leds

@robotmaker Look at my schematic and description beneath it, i already advised him to use a mosfet. As for the blinking, Lloyd said he wanted to do it randomly. I don't think that's possible with a 555.

Good point on the 10 mm LED. Maybe I'll try putting 2x 5mm in the tube. One blue, one red. Hopefully will give me a purpleish effect. I'll fog the lense. I'll observe the discussion on the circuit for now. Thanks all.

HI Guys, Yes I have been following what is going on and I am very happy to see the sharing of information. Llyod did you ask my age? Will I am 59 years young I started working with computers in 1970, MY first job yes in 1971 as a computer operator. Then on to programmer, software developer, writing software for the US, Toronto and the Australia office. I then became the manger of the help desk and IT department. That is when I stop programming and had to worry about a lot of people and had a lot of stress in my life. MY Job like a lot of others went over seas. An the the strokes began. stress ok sorry I gave you more info then you asked about. I have a passion for robots I always have.

Niek- Good work I will use it and if I have any questions I will let you know.

Thanks BC

PS this is why I try not to talk on the forum( I can get longe winded) blush

Want to know my story?

My name is Niek, I'm 13 years old, from the Netherlands and i love electronics, computers and all technical things.

Since i was about 7-8 i've been busy with electronics, i used to make alarms on my door with 2 paperclips that touched each other when the door opened and for example made lights and beepers turn on.

After that I have been busy with chemicals but it lost my interest when i got my own soldering iron when i was 8. I directly soldered a little bike out of iron-wire and then mounted a little working light on it. After that I was mainly busy with electronic-kits (electronic dice, light seeking robot, and a small LED-marquee)

When I joined a local hackerspace (where you had to be 12 to join) at the age of 9 I was extremely happy. I have put together many more kits like a wooden drawbridge, working radio and solar battery-charger.

For the parts in my projects i usually took apart things I got like a electronic toothbrush, car radio and all kinds of things (I even drew little schematics for inventions at school!)

About 3 years ago I started NiekProductions.nl. It was some kind of experimentation site because it always changed. After that i bought NiekProductions.com.

Until half a year ago I thought PCB designing was hard and unnecessary but now i'm almost constantly busy doing it. I have designed a lot (from witch half isn't published) and i'm still busy doing it. Now i think it's a lot more synoptic (compare the schematic above and below

Hope i haven't been using up too much space in this thread.

-Niek

I forgot to mention, maybe you already noticed but i tend to document everything i do.