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Hi, I am starting to learn electronics and I want to make a low battery condition on a smoke detector.
I wanted to do this with 12Vdc from a PC power supply and a potentiometer in series, but the detector shuts down when I adjust the potentiometer.
Do you have any ideas how to do this?
Hello,
I made a simple project with PIC, a LCD and a few buttons in assembly.
These two articles are the best info that i found. My LCD was another model, but i could get some hints out of them. The worst part was to get over the errors in the datasheet ;) , fixing typos in my...
Hi,
I can't find my documents on the subject, i think i gave the disk to somebody.... ;))
i found this:
https://www.daycounter.com/LabBook/BoostConverter/Boost-Converter-Equations.phtml
They are saying that the ripple current is f(inductor current), so it looks like the ripple voltage would...
Hello,
I once did a boost converter, from 12Vdc to about 50Vdc, but i don't remember the ecuations. Try searching for "switching mode power supply design guide".
I just wanted to say that in any case you want the output ripple to be as low as possible, for that you will ad an output filter...
evrika! (i think :)) )
you've all been very helpfull, Brian's solution is the what i have been looking for. I don't really know how to put that in to code yet, but if i have my varibale PIN_I from 04h to 01h, and substract if from PORTA, at some point i will have Z set. This has to work, i...
Hello everybody, thanks for your posts.
(sorry for neglecting to say that i am using pic16f84a, gpasm assembler and gpsim simulator)
the line "PIN_I equ 0eh" means that the character string "PIN_I" actually means "the number stored at 0Eh location"
after that, i load PIN_I with value 04h or...
Hello,
I'm trying to make sort of a pocket calculator using pic16f84a. Right now i got to the stage of using buttons (ra0 --- ra3) and trying to output to PORTB. Later i will use a display
I want to bit-check every pins ra3, ra2, ra1 in this order so that pressing ra3+ra1 = 5 (an operand for...
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