Hall sensors are always noisy, your only recourse is low-pass filtering to average theDatasheet mentions a 10-100n cap across the analogue input.
readings over a longer time period, or use a better technology.
Note that that device has no accuracy specification at all in the datasheet! Not very
encouraging. Its sensitivity depends strongly on supply voltage too.
How to use an LCD without liquid crystal library.Often ridiculous requirements like this are part of an assignment. Is it homework or course work?
That is the usual way to use an nRF24 module. The I/O pins are 5v tolerant but it needs 3.3v on the power pin.This only means one can send data to the nRF24. The ATmega328P datasheet states that Vih must be .7 VCC minimum. If running at 5 volts, this means logic high must be 3.5 volts or greater.
even uninstall and reinstall the Adafruit package didn't help, same error.uninstall leaves a bunch of staging files around, I think, so it doesn't do as good a job at cleaning as you might expect.
as it seems, deleting the Adafruit folder in "portable\packages\"That would have been my advice (assuming you have "portable." Otherwise, you need to go digging in the Arduino15 directory...
/* The following code examples show how to initialize the SPI as a Master and how to perform a simple transmission. DDR_SPI in the examples must be replaced by the actual Data Direction Register controlling the SPI pins. DD_MOSI, DD_MISO and DD_SCK must be replaced by the actual data direction bits for these pins. E.g. if MOSI is placed on pin PB5, replace DD_MOSI with DDB5 and DDR_SPI with DDRB. */
/* Set MOSI and SCK output, all others input */
DDR_SPI = (1 << DD_MOSI) | (1 << DD_SCK);
/* Enable SPI, Master, set clock rate fck/16 */
SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR0);
void SPI_MasterTransmit(char cData)
/* Start transmission */
SPDR = cData;
/* Wait for transmission complete */
while (!(SPSR & (1 << SPIF)))
I have tried using an Opto-coupler to detect the individual voltages but the coupler cannot measure variations in the battery voltage drop.It can if it uses the right sort of optical isolator and operational amplifier.
Da bin ich mir nicht so sicher. Das 2. Foto vom Versuchsaufbau sah ja (fast) genauso schlimm aus.Naja ... vielleicht ist das, was die dann in die Hose geht, worüber dann andere Witze reißen. Der Zusammenhang zwischen Naturgas und Genialität ist manchmal jedenfalls offensichtlich.