Eval¶

Overall design¶

• 4 x red+green LEDs for condition
• Restart button
• Rotate over the ADC channels and get Voltage level
• draw 100mA
• Die Kabel haben AWG28, 212.9 Ohm/km, 1.4 A nach erde, 0.23 A versorgung
• https://de.wikipedia.org/wiki/E-Reihe#/media/Datei:E12_values_graph.svg

U2=((U*R2)/R_GES)

U
R*I

5V/0,1A= 50 Ohm
5V*0,1A= 0,5 W

RGes = R1+R2 = 50

3V=(5*R2)/50
R2 = (3*50)/5 = 30 -> 27
R1 = 22
RGES = 49

U2 = 5*27/49 = 2,755102

MCU¶

• stm32f051c4
  • I have 17;
  • 16 ADC channels
• STM32G030C8T6
  • nearly same specs but smaller footprint; LQFP 48