Features:
- 3-channel 0-19v voltmeter with calibration support. Resolution is 0.01v.
- 2-channel 1Hz-30MHz frequency counter. Calibration is supported.
- 2-channel 10Hz-9999kHz PWM generator
- Capacitance meter. Range is 1pF-10uF. Maximal resolution is 0.1 pF. Calibration is supported.
- Inductance meter. Uses this adapter. Range is 0.1uH-10H. Maximal resolution is 0.01uH.
- External I2C device support:
- SI5351 DDS generator, Frequency range: 7813Hz...100MHz
- INA226 current shunt and power monitor. Voltage range is 0..36v, resolution is 1mV, Current range with 0.1Ohm shunt resistor is -0.8..0.8A, resolution: 0.1mA
- MCP3421 ADC with voltage divider 1:11 (1MOhm resistor from input to ADC, 100kOhm resistor+0.1uf capacitor from ADC to GND). Range is -4..+33v. Resolution is 0.01mV. Calibration is supported.
- MCP9600/9601 Thermocouple EMF to Temperature Converter.
Uses:
- 4xMAX7219 LED board
- 4x4 Matrix Keypad
- EC-11 Encoder
Required MAX7219 board modifications for power line noise reduction:
Pins:
I2C:
- SDA: GP0
- SCL: GP1
MAX7219:
- CLK: GP16
- CS: GP17
- First module DIN: GP18
- Second module DIN: GP19
- Third module DIN: GP20
- Fourth module DIN: GP21
Keypad:
- OUT pins: GP18, GP19, GP20, GP21
- IN pins: GP22, GP2, GP3, GP4
Encoder:
- A pin: GP8
- B pin: GP7
- Button pin: GP6
Capacitance meter:
- CX input: between GP11 and GND
- Resistor 220 Ohm between GP12 and GP11
- Resistor 100 kOhm between GP14 and GP11
Frequency meter:
- Channel 1 input pin: GP10
- Channel 2 input pin: GP9
PWM Generator:
- Channel 1 output pin: GP15
- Channel 2 output pin: GP13
Voltage meter:
- Channel 1: pin GP26. Voltage divider: 1MOhm resistor from input to GP26, 200kOhm resistor+0.1uF capacitor from GP26 to GND
- Channel 2: pin GP27. Voltage divider: 1MOhm resistor from input to GP27, 200kOhm resistor+0.1uF capacitor from GP27 to GND
- Channel 3: pin GP28. Voltage divider: 1MOhm resistor from input to GP28, 200kOhm resistor+0.1uF capacitor from GP28 to GND