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OK. Let's make it +/- 1%.
Right now I'm trying to figure out if a LMC555 or a microprocessor would be the better way to go. (The exact microprocessor hasn't been determined yet, something SOIC size or smaller.
I'm going to close this project. All of your responses have help me realize that using a voltage regulator approach won't work For this project. There is just too much heat to be dispersed with the small size of the circuit board that I want.
Special thanks to Klaus who helped me learn how...
Thanks much for the link. I hate to admit it but I learned all that stuff in college. The only trouble is/was that was the last time I had used it and I had forgotten most of it.
My apologies to everyone for my silence. I've been off doing some micro carbon fiber construction stuff.
Ive looked at data sheets and reread all your posts.
One of the things that I hoped to figure out on my own was how, and on which timer, to make the time interval adjustable.
The way I...
Thanks for all the suggestions. It's now up to me to put together a working circuit.
I'm half convinced that with the voltage regulator approach I won't be able to get enough heat sink surface on the PCB and still keep the total area under a square inch. Besides the PWM approach should be...
Brad, I'm a electronics dummy. I didn't understand everything you said.
I think that you said the 555 chip should work. Is that correct?
You mentioned pin 5. Is pin 5 labeled 'ctl' on the circuit diagram?
"Suppose your control circuit is pulsed DC, and you have a way to increase duty...
Thank you very much. I was unaware that the LCM555 might work. I will investigate it. I will also have to look to study up on X7R ad 'woozy aluminum electrolytic dielectrics.
George
Dana,
I might have mislead you in calling it a timer. It would have been more accurate to call it a...
I have an idea floating around in my head but everything depends upon finding a micro size timer chip. The timer just has to turn on/off a MOSFET. By micro, I mean a chip smaller than a postage stamp.
Does anyone know of a micro size low voltage IC timer? All I need is the part number of...
I know that I'm guilty of using acronyms without explaining their meaning. I try to define the acronym unless I feel that it is a common one within the topic of the discussion. (Do I need to explain what USA means when I say that is where I live? ) The SC4216 data sheet says at the top...
1661784209
"SMPS: It's expected that you do simple internet search on your own. Not meant rude."
Not Rude at all. And I agree completely with the comment.
Here are some of the returns from my simple internet search. Society for Marketing Professional Services,Scanning Mobility Power Supply...
True. No argument here on the voltage drop comparison between battery and capacitor.
The device I'm trying to design is specifically for use with super capacitors and hybrid capacitors. The use of batteries is not an option in this case.
I'm familiar with RC. I've been doing it since 1980. The one problem with PWM used in radio control is that it does not automatically adjust the pulse width/frequency as the battery voltage drops.
But lets leave the RC talk for an RC forum.
The photos were posted only to give an idea of...
Klaus and a123,
I appreciate you point out possible solution to the heating problem. Unfortunately I need a little more assistance. First, let me state that the ultimate goal to to control the motor's power. How that is done is immaterial. I chose to try and control motor voltage since that...
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