Metallica Man X wrote:Nothing like making it work yourself....and doing it with random junk just makes it that much sweeter
From just looking at the way the small drum is in there, it looks like it's gonna be a pain to work with it...
Hi yes its good to use the junk for sure ,the transistor the one thats driving the motor on the large drum i think is a 2n3055...but not sure as the markings have gone from the case must of been an early part i collected in the 80's !
i was testing them transistors to see which would run the motor at full or near on that speed and what i could get away with then i could control it via the base..you really near a power trany for this smaller ones get hot and you loose speed to the motor.
The Hall effect sensor does not have to be as close as i have placed it on the drum but closer higher the signal you get ....
The Lm311 and NBTV sync triggers and resets 555 timer bistable each time a line starts...i don't really think it matters how many slits to magnets
apart from them having to be the same , it doesn't seem to matter in manual and i can see its the same now for the syncing it seems just to be a matter of motor speed than correct number of lines half the number of lines so on....get the speed right let the motor and your eyes work out the maths .
No the small drum is stepper motor controlled to control it in auto you need to do as Holtzmans the large drum controls the small Holtzmans used a different stepper motor to mine he did a light triggered mechanical flip flop to drive he's stepper.
Mines a different stepper motor type it sort of likes one pulse after the other at the moment i am using a clock to 555 timer to drive the electronics that drives the stepper motor ...i need to replace this clock signal via signals from the large drum the large drum has to be my clock
.
In manual you can run the small drum any speed and as long as your large drum is in sync you will see a picture .....number of pictures per second just depends on the speed ...also to slow a speed the image is narrow and small to fast the image is wide and large ...need to get the speed in the goldilocks zone just right so getting pulses via a hall effect sensor i need the right timing .....i had a lot of trouble last time i tried this using opto fork idea but the hall effect sensor seems for me to be easier .
I will show any results just have to track down the other hall effect sensors in my parts collection ...they are there some where !
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.