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Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Hey guys,
Im currently looking for a Function generator chip that interfaces through serial so i can hook it up to a ATMega Chip, Does anyone know of any good types?
Im planning for a range of: at least 5-55% duty cycle control (5-95% would be awesome) 30-150Khz about
I have been looking around for a while but am unsure what to go for, id rather not have a SMD Chip however.
Thanks!
EDIT:
Only thing ive found is this... and i really dont think i have much hope in using this frankly... (I would hate to solder this...)
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Im basicly after 30-150Khz Square wave with PMW Control Nothing else really, ofc, i would prefure it to go upto 300Khz, but that might be a bit much to ask for.
I kind of think that chip is hard to solder as its 8mm x 8mm and its got 40 or so tiny pins.
Thats all im really after, id prefure to do the board at home to keep costs down. i usually use stripboard.
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Sorry, Didn't mean PWM, Basicly, i want to be able to enter the frequency and duty cycle into my ATMega, it would then give me the Duty Cycle and Frequency I wish as a Square Wave, thats all. (I want to use this as a controller for my H-Bridge)
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Well, when you take a square wave and adjust the duty cycle, that's PWM isn't it? Or do you mean it in the Tesla coil sense, the duty cycle of the waveform is 50% but it only runs some of the time.
The ATMega's timers should be able to handle it either way.
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
BigBad wrote ...
What do you want it for?
Already Stated that :)
__=|(:3)-|--{__ wrote ...
(I want to use this as a controller for my H-Bridge)
Mabye i should go back to this project at a later date.... got another thing that i think could be more useful... Anyone got any good links / directions to Powersupply Design? (Always wanted to make my one powersupply!)
(I still wouldnt mind knowing what chip for this however...)
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Serial Controlled Function Generator chips
Or do you mean it in the Tesla coil sense, the duty cycle of the waveform is 50% but it only runs some of the time.