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I have a 7805 circuit, can I connect it directly to a USB port to power off some USB devices that might take up to 500mA?
There is no proper current limitation as the 7805 can provide more than 1A.
The power source for the 7805 is a 12V Lead acid battery. There is also a 1.45A fuse for...
I have a 12V 4.5Ah lead acid battery.
I needed to discharge it so I can test charge it.
I think I can just put a resistor across the terminals with 1ohm, 2W and it should discharge at in 2 hours?
Is this even correct and safe? Don't want to cause a short circuit...
What other simple ways to...
I'm building a dual axis sun tracker. My solar panels are rated 10W. The solar panels is going to charge a 12V lead acid battery.
I tried the circuit below but didn't manage to get any good result.
Now, I 'm thinking of just using the 10mm Greed LED as photodiode and connect 4 of them(for dual...
I did set all my ADCON0,1,2 correctly. I don't think my PIC have the ANSEL bit. Yes, I'm using PIC18F4553. This is more of a question than solving a problem as I am already using other ADC Channel.
Ya, I know the maximum is 4095.
On AN0, all I get is single digit output(000X) instead of something like 1365.
But on AN1, I can get the actual value(1365).
The settings is correct. I just wanted to ask whether it is possible that I only fried ADC Channel 0 and nothing else.
I've been testing my ADC Channel 0(AN0) and the output is always single digit from the 12bit possible(0 - 4095).
Then, I tested Channel 1(AN1) and it reported the correct voltage.
Did I just fried my ADC Channel 0? Is this possible?
Thanks for the pointer. I'm using PIC18F4553 and there's no configuration things on the datasheet. I should be looking in the PIC18F4550 datasheet, it is all there.
Thanks.
I have the table for the configuration settings for PIC18F.
The ones with PLLDIV, CPUDIV, FOSC, BOR, BORV.
For some of them, I understand what it means but for the rest, I have no idea.
Is there like a tutorial of guide explaining all the configuration and when I should use it? For example...
mg995 20ms
I've tested my MG995 digital servo powered by a PIC12F675.
This servo can turn 200degree or 220degree, didn't measure, but definitely more than 180degree.
Using the normal 1.5ms/18.5ms timing, I manage to make it go 90degree. Around 0.9ms/19.1ms, it is at 45degree.
Then, around...
I've been looking at the ADXL320(dual axis +/-5g), ADXL322(dual axis +/-2g) and ADXL330(3 axis).
Now, what does the +/-2g/5g means? Acceleration that can be measured? Both are the same price, so =5g should be better?
What is the difference between dual axis & 3 axis? Dual axis only measured...
Did I just fried my PIC?
How easily is it to destroy a PIC18F?
Look at the schematics below. When soldering the components, I accidentally did some mistakes.
I solder the capacitor connected to the 78L12 with its polarity reversed.
I solder the BC556's Emitter and Collector in reverse.
I...
That's practically all I need to know. It seems that everyone else is using MAX232. But if using this method, I can make my PCB smaller.
I do intend to program the PIC off board.
There is 2 bootloader which only uses MCLR pin, the ZPL and the one from Pikme. They both uses different methods.
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