Dumb MPPT question joeymorin wrote:
John_A_Brown wrote:They have an OC voltage of around 20V And the short-circuit current at full insolation?
250mA
Just checked it.
USART in SPI mode for reading 128 bit stream at 25,000 bps "If you don't enable the TX then nothing would come out on the pin. (same as for the XCK) "
Is that true?
My understanding was that I have to keep the TX fed with bytes, as...
Monday, 18 May 2020 - 12:16
USART in SPI mode for reading 128 bit stream at 25,000 bps Seems to work well. I tested it on an Arduino Mega2560 PCB. The clocking pin for USART1 in SPI mode isn't connected on the PCB, apparently, so only wasting one pin(TX1).
Apart...
Monday, 18 May 2020 - 09:57
Dumb MPPT question ki0bk wrote:
John, I make and sell simple solar chargers for SLA and LiFePO4 batteries, if you need help with your project pm me or ask specific questions here.
glad to help....
Sunday, 17 May 2020 - 21:07
Dumb MPPT question joeymorin wrote:
John_A_Brown wrote:They have an OC voltage of around 20V And the short-circuit current at full insolation?
I haven't tested that yet.
Sunday, 17 May 2020 - 21:05
Obscure Far-Eastern Controllers About 35 years ago, I programmed some Toshiba 4 bitters. Hard to imagine these days, with 8 bitters costing pennies.
It was an interesting experience, though.
...
USART in SPI mode for reading 128 bit stream at 25,000 bps N.Winterbottom wrote:
John_A_Brown wrote:
But to answer your questions, there is an analogue signal, which is precision rectified, low pass filtered, and then fed to a comparator...
USART in SPI mode for reading 128 bit stream at 25,000 bps ka7ehk wrote:
The biggest problem MAY be how to maintain timing across byte boundaries. Normally, I would suggest a gap a byte boundaries to allow for processing time in the...
joeymorin wrote: John_A_Brown wrote:They have an OC voltage of around 20V And the short-circuit current at full insolation? 250mA Just checked it.
I have a surfeit of I/O pins. I can live without the TX1 pin.
From the datasheet... "Using the USART in MSPI mode requires the Transmitter to be enabled, that is, the TXENn bit in the UCSRnB reg-ister is set to one. When the...
"If you don't enable the TX then nothing would come out on the pin. (same as for the XCK) " Is that true? My understanding was that I have to keep the TX fed with bytes, as...
Seems to work well. I tested it on an Arduino Mega2560 PCB. The clocking pin for USART1 in SPI mode isn't connected on the PCB, apparently, so only wasting one pin(TX1). Apart...
ki0bk wrote: John, I make and sell simple solar chargers for SLA and LiFePO4 batteries, if you need help with your project pm me or ask specific questions here. glad to help....
joeymorin wrote: John_A_Brown wrote:They have an OC voltage of around 20V And the short-circuit current at full insolation? I haven't tested that yet.
About 35 years ago, I programmed some Toshiba 4 bitters. Hard to imagine these days, with 8 bitters costing pennies. It was an interesting experience, though. ...
sparrow2 wrote: On a project I used a 433MHz remote control, (from cheap AC relay switches), and the data pin of the receiver to a AVR input. Because it come relative...
N.Winterbottom wrote: John_A_Brown wrote: But to answer your questions, there is an analogue signal, which is precision rectified, low pass filtered, and then fed to a comparator...
ki0bk wrote: John_A_Brown wrote: Then I will compare these 128 samples with a selection of stored patterns to determine the best match. Alexis order more TP, order...
ka7ehk wrote: The biggest problem MAY be how to maintain timing across byte boundaries. Normally, I would suggest a gap a byte boundaries to allow for processing time in the...
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