- Holtek HT16k33
- 4 Digit Numerical Display (Red)
- 16-Step Dimming
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- Holtek HT16k33
- 8 Digit Numerical Display (Red)
- 16-Step Dimming
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- Texas instruments TCA9534A
- 5-V Tolerant I/O Ports
- Three Hardware Address Pins Allow up to Eight Devices on the I2C bus
- Pin-Change HW Interrupt
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- TCA9534A GPIO Expander
- 16 Key Input Pad
- I2C Interface
- Interrupt Generation
