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bitem2k said:I have very little use for it really and I dont need it back.
bitem2k said:Hi, I just ditched the pcb. Best thing i ever did with it. I have since made several different pcbs that all work (after a little debugging).
I reckon it was just shoddy soldering on my behalf.
thanks
I wouldn't recommend Crocadile Clips for any serious simulation. It's only designed for educating school children and it's a bit 'Mickey Mouse' for most applications. I have a copy I got from school many years ago, it's perfect for simluating digitial logic circuits but a 555 timer circuit is about as far as you can go with it, and even then you can bump into problems.bitem2k said:simulated it in croc-clips
Clayton said:Hi guys,
Im new here and new to electronics, but I've run into this problem before. What my experience has been is that the 555 gives out a sine wave form, not a square form. What that means is that it doesnt go all the way down to 0v, so there is still some residual power going to the NPN, causing it to allow current to flow through.
Clayton said:Nigel Goodwin,
I apologize for providing bad information, I do try to avoid doing that. You will find that I post very little.
However, my solution is still valid as has been shown through several working projects.
Clayton said:You ask in what respect is my solution to bitem2k's problem still valid. I would ideally point you to my own completed LED projects. However absent that option, I guess I'll have to make a logical presentation.
the resistor between base and emitter is standard practice, for the reasons you stated.