3
Can anyone confirm that the MOSI/MISO lines will not behave in any
unexpected way \$\color{red}{\text{OR}}\$ is there a better way of achieving such a
functionality in our design ?
This is the \$\color{red}{\text{OR}}\$ answer...
It seems to me like you are going to a helluva lot of trouble using voltage level translators (i.e. the SN74LVC2T45D) when the ...
2
Just in case you wonder how to do this "by the book". Assuming these vias are plated on both sides and connected, then the proper way to solder them (as per IPC standards) would be:
Peel & cut the wires so that no more than 0.5mm protrudes on the solder side. About as far as an insulated AWG24 wire is thick, so you could use such a wire as ...
2
Here is a related answer: https://stackoverflow.com/questions/60191137/i2cdetect-does-not-recognize-vl6180x-sensors-behind-tca9548a-i2c-multiplexer
Basically, there is some driver magic involved in getting i2cdetect to "see" devices behind a multiplexer. It's possible that the differential i2c somehow breaks that magic.
The standard way to use the ...
2
You need two (or three) modules. These can be DIY using input from elsewhere - application notes from IC manufacturers is usually a areasonable source of these. Input from You Tube videos and websites in some cases works well but can also be very unsatisfactory.
You need a boost converter that will run from 4S LiIon in any state of charge that outputs ...
1
If you want amplifiers, take Instrumentation OPamp such AD622.
Sample/hold components (LF398) would be helpfull, but not really needed.
You can then use a microcontroller who ADC speed is fast enough. I think a STM32F1.. (BluePill) is ok. Raspberry too. Some 16/24bits ADC boards can also be used if they are correctly interfaced.
Example : AD7606 (16 €) ; 16 ...
1
The RJ45 cable might be the culprit.
In the old days, if you connect the device to the device directly, it required a crossed RJ45 cable.
This leads to having crossed, and normal RJ45 and it's sometimes difficult to know which you actually are using. On top of that, there are different pinout standards for those cables, and additionally, you have different ...
1
Since everything is working fine when you connect the green line, it must be a 'hardware error' caused by long distance cable. If you have not checked the I2C line with an oscilloscope yet, you can only assume that your signals reach their destination safe (aka without any signal degradation).
So yes I dont trust the 'QwiicBus - EndPoint' just like that. I ...
1
ESP32 has Wifi, so it is remotely controllable, and it has an excellent PWM with 16 outputs including HF dithering.
TLC59711 - seems to be best, but not really hand solderable and current output (so not suitable for the led amplifier)
You can hack the current output into a voltage output, but it will be inverted. You can invert it back by connecting a ...
1
I had the incorrect baud rate, and a loose connection on the RX pin hole of the GPS Unit.
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This is the data sheet of the circuit that controller the display.
https://html.alldatasheet.com/html-pdf/950456/ETC2/N79E814AS20/8156/77/N79E814AS20.html
pin1 is CS
pin2 is Clock
pin3 is Data
Is a Microcontroller, but I do not know,
how to program it.
in the microcontroller
Pin 1 is SPICLK, KB0, PWM3, 00.0
Pin 2 is ICPCLK, MOSI, PWM2, P1.7
Pin 3 is ICPDATA, ...
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