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I have built capacitive discharge ignition for this bike, with boost converter to 300V, perfect timing control with MCU, but have learned hard way (busted regulators) that supply voltage will not come down on its own, even with some load. It is simply too high, because of very crude alternator...
Now this is quite interesting.
How do I calculate the correct inductor value? I suppose I'd need to know the switching frequency at least, right?
And this resistor at the bottom, is this internal battery resistance, or something else that I'd need to account for?
Thanks!
@BradtheRad
Yes, all voltages except the main supply that goes to switching element - power mosfet. My goal is to avoid converting excess voltage at high currents ( 10A) to heat, as this would happen with resistors, zeners, etc.
I am fine with small zener and resistor just for bootstrapping...
@KlausST
As this is to recharge very small battery and to run lights and signalling, with no more than 100W of power altogether, I guess 10A should be fine. I suppose that is doable as far as mosfet selection goes, but I am of course unsure about other components.
Many of those manufacturers...
Hi all,
I am working on improving electric installation on older type KTM motorbike, and there is this nasty permanent magnet alternator giving out AC ranging from 20V up to 70V depending on RPM. The idea is to make switching step down regulator that takes this type of input and give out 13.8V...
Just to close this up -
I have got another batch of displays, with UltraChip UCi6963 controller, which claims to be T6963 compatible. And indeed it is. This one works as described by Toshiba *and RAiO* datasheets. Perfect.
My guess is that troublesome display (I have two of them, blue...
I think the OP asked if after applying 9V to module intended for 1.4-3.6 will do any harm (to health of) to the module.
"Is this module still healthy after I put 9V to it?"
The setup is trivial, Atmega 32U4 has no memory mapped model, so everything is bitbang. I have provided real source code in first post, which shows pretty much what is going on there. You should read first post carefully and you will know the MCU type and access model.
Please explain how could...
Gorgon,
How often did you read from this controller?
This is not a matter of reading status bits. Status bits work just fine in my case and I have no problem in controlling this LCD as far as doing write commands. It is the data bits that are simply LOST from the bus if I access them too...
The delay should have only lower limit - tACC which is 150ns, as per datasheet. T6963C should keep the data at D0-D7 as long as /CE and /RD are kept low. But it doesn't.
I did try with delays in microseconds range, and also went with milliseconds. No change. It works best if I read data after...
Hi,
I've got this problem that is already taking too much time and I cannot really figure out what is happening here:
As per datasheet, to read data from T6963C, one needs to bring C/D line to low, then bring down /CE and /RD also down for at least tACC time (specified at 150ns), after that...
TFT timing controller
It seems that stand-alone timing controllers exist on manufacturer websites, however datasheets for such devices are virtually impossible to find, and part stores don't even know about such part numbers.
For example, Himax has a range of timing controllers:
**broken link...
To give the response to myself, just to have this topic closed:
As I did late night research on TFT interfaces, it seems that no large TFT display (10" also considered as 'large') comes with built-in TCON. And TCON must be used to interface LPC2478 with this display, as it will convert...
MCU Security Lock
I have heard different story about unlocking - by undervolting it, so it still works works, but can trip and flip a lock bit. Don't know how close to reality this story is, and I never tried it - never had need for it.
This is the display I'm about to use in my project - it's Formike's KWH102KQ03-F02, for which I got datasheet earlier (as they are reorganizing their website, and lots of old stuff is not yet online). (**broken link removed**).
uC that I'll be using is NXP's LPC2478, and I have also Olimex...
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