1. hardware specification
PCB: 4-LAYERS
MPU: STM8S208R6
CAN: SN64HVD230, DB-9 male connector
UART: MAX3232, DB-9 female connector
ANALOG INPUTs:
- 8 asymetrical/differential inputs (2 terminals Hi/Low for each analog input)
- input voltage range 0-5VDC or 0-36VDC (selectable)
- conversion ADC-10bit resolution (built-in MPU)
- input impedance: min. 100kohm
ANALOG OUTPUT: current loop 4-20mA, DAC 10bit (built-in MPU)
PWM OUTPUT: type PUSH-PULL, max. 100mA, freq. range 1-20kHz, duty range 0-100%, 10-bit resolution
POWER SUPPLY: buck-boost DC/DC converter, input voltage range: 6VDC-36VDC
2. main parameters and functionality
- operating temperature range: -10 ÷ +70*C
- PCB preparing for electro-isolation coating
- housing min. IP55
- connectors: terminal block (deatachabled) ex. DEGSON ELECTRONICS
- EMC compatibility for automotive environment
- inputs/outputs protected against overload, short circuit, ESD stress, etc
3. contractor provide:
- schematics under Altium Designer
- PCB layout under Altium Designer
- 3D view of PCB under Altium Designer
- BOM
- specification of customized components (if any)
4. deadline: 3 days
5. payments:
- first milestone - 30% total payment - after receiving schematics
- final payment - 70% total payment - after receiving PCB layout and 3D View (completed docs)