Hardware » sensemux

h1. Eval

Usecases:

* sensor for 4 sensors

Keep it simple because i dont even know if it will work (dg409 has 100Ohms; can be checked with existing sensors). 

use dg409 to switch between sensors. (DG409 is 2:4 with 2 address lines, DG408 would be 1:8 with 3 address lines)

Dann kann ground gleich mit geschaltet werden und mehrere sensoren sllten sich nicht beeinflussen.

* -2x 5v output for pumps.- Generating 6V somewhere else makes more sense

* -i2c RTC for date (standalone), recording- temprec

* CAN for candis.

* -1xPWM output (trivial canio, workaround fuer lampen. Warum 2?)- anderes projekt

* -1xPWM output buzzer; 17:[[https://www.homofaciens.de/technics-base-circuits-h-bridge_ge.htm]] muesst sein, mit not baustein.          

      Wenn invertiertes PWM-Signal vorhanden ist, spart man sich nen enable. NOT + NAND- anderes Projekt

* -Update via USB is a nice feature. Circuit already available.- Andere MCU

* -RTC for recording- temprec

* -PWM output for lamps-

* -loud buzzer for alarm/alarm-clock-

* -button for confirm stuff-

* -OUT output for lamps; 2x3V (plant lamp/room lamp)-

* 2LEDs regular

* -SPI NAND-Flash- temprec

* -Switch connection VUSB to can-

* internal RTC to provide timestamps

* I2C-eeprom fuer CAN-Id, dann doch I2C-RTC?

* Dann doch SPI-Flash?

Most things can be copied from candis.

( https://www.nxp.com/docs/en/data-sheet/MC34933.pdf )

h1. Connectors

* Debug

* -USB-

* 4x 2Pin Sensors

* CANBus

* -1x 2Pin PWM Out for Lamp-

* -2x 2Pin Out switch Plantlamp, room lamp-

* 2x 2Pin Out pumps(3V)

h1. HMI

* 2 LEDs regular (green/amber)

* 4 LEDs sensors selected(org) (SIPO)

* 4 LEDs sensors status(vio) (SIPO)

* -1 Button, quit alarm-

* -2 Button boot/reset (firmware update via USB)-

h1. Stable 5V

* "Buck/Boost IC's":https://www.tme.eu/de/katalog/spannungsreg-integ-schalt_112879/?params=2900:1698398_topologie:buck-boost