MikeB

Hey, i have recently built the 7 segment LED counter from this website (http://www.electronics-lab.com/projects/misc/012/) and i couldnt make it count. What exactly is a TTL pulse and how can i provide it to the counter to make it count up? Thank you very much.

Best result so far is launch an aluminum ball for 20cm... still wokring on it

Today i am going to buy all the neccessery equipment... so i will experiment for a few day.. the thing is that all the high voltage experiments are out of the list cuz i dont have the budget not the ability to use more the ~24VDC and i have a pretty strong magnet that can open and close a doot with 12VDC so i will try to open it and use the electromagnt itself for my launcher... so i will update hw the process is going and if it will wok i will post how it should be built.. but if you can give me any ideas or websites that migt help it will be great Steven, Thanks for all your help

sorry for poor quality, if u wish a better schemetics tell me.. i will make and post a better one

Thanx for replying.... i didnt quite get how u made the nal fly out, is there a way to energize a ball made out of aluminum (about 30g) to launch for more then 3m (up to atleast 6m)... and i thougth about the coil gun with the many coils, and it doesnt take a lot of money to create one (just simplest laser pointers, photosensor and small relay... but still, it is a lot of work to set it all up... my idea was more like in the picture i attached... when i conect to the electricity there is repolsion between B and C.. when i remove A parts it shoots the balll D out and E is how the electromagnets lok fron the side.. but thats only my theory... i have no clue how to make it work.. i mean what i dont knwo is will it be able to launch a ball 3m or more and how much coil turns i need and which materials will give me the best result?

sorry for posting it twice

Hey, i need to build an aluminum ball launcher for school, I already built one from wood and a spring however it is very inaccurate

Hey, i need to create a aluminum ball launher, my first launcher was mae of wood and a spring working like a catapult. i want to create a new launcher using which will wokr as an electro magnet since the one i made is very inaccurate... and hard to make it accurate... i need an idea, i dont really know much about electro magnets.. but what can i do? my i dea was to put a magnet half way into a coil and when i connect it to electricity the magnet will move into the centre of the coil pretty fast and when it will stop the aluminum ball sitting on it will keep moving and shoto it into the air.. any suggesstions about how to makeit acually work? (using no more then 24V source) I will be very thankful for ANY suggestion.. thanks