Guess

[Trinity]

Originally Posted by PsYkHoTiK

I reckon that its for that flash light LED. The Luxion star one I believe? Didn't you leave it running for quite a while?

Your thinking about that cheap led flashlight I left on to see how long the thing would emit light, The batteries just gave out last month (RIP Batteries)... After almost 3 years!

I do have 2 one watt luxeon stars running all the time. A red and a green. But those are powered by an ac adaptor. Trin will see if they really last 5 years...

BTW, Case modders should look into those Luxeon Star LED's. They would make for some AWESOME case lights!

Luxeon LEDs - Products & Accessories

[peaz]

Originally Posted by Trinity

Peaz, The_YongGrand,,, Correct! A buzzer!

I made the thing back in the 80's. I found it while I was looking thru some old stuff, So I got it out to see if it still worked, Chip was dead.(RIP 4011)...

I had a spare, so I popped it in and it works again. I have it hooked to a piezo element, And adjust it to put out "super" hi pitch. What for you ask... I used to take to school and turn it on in class. It was fun to see some of the other kids look around to see where it was coming from but no one could tell.

LOL. it was just a matter of deductions. Remembered my old chaser LEDs project back in school. used some NAND gates chip too. and the variable resistor was another clue. Whee!

[Trinity]

Chaser led's...

4017

[Mac Daddy]

Well missed the guess but do love old CMOS technology takes me back to college in the 60's

Just kidding but made ya look 80's

[The_YongGrand]

Originally Posted by Trinity

Chaser led's...

4017

Yes, a 4017 for those chasing LEDs. You can also make an electronic dice out of it (you modify the outputs), or a good roulette game kit (with another chip with gates). I once had a roulette game built with these chips and played it during the Chinese New Year!

edit: and the forrest mims book is very good! The layout and the explainations are extremely simple! Seen the sample pages in Amazon... it's pretty cool for a layman.

And including engineering students like me too.