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Custom Keypads,ocks, or simple data input keypads. Normally these have their buttons arranged in rows and columns so that they can be scanned by the host computer, reducing the number of I/O ports necessary. You’ll do the same in this chapter but using the DIP form of the PCF8574 I/O chip to avoid using up precious GPIO ports.

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Introduction,f memory and several built-in peripherals already assembled! Not only that, but the system will run a Unix operating system, whether it be Linux or some flavor of BSD, complete with a compiler and a plethora of other software tools. All of this fits in the space of a credit card footprint.

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MCP23017 I/O Port Extender,O ports. This chapter will examine the Microchip MCP23017 peripheral chip, which can offer any combination of 16 GPIO ports (in DIP form), each of which can be individually configured as input or output. Figure 11-1 illustrates the chip sitting on a breadboard.

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Éva Erdős,Zoltán Nagy,Zoltán VargaO ports. This chapter will examine the Microchip MCP23017 peripheral chip, which can offer any combination of 16 GPIO ports (in DIP form), each of which can be individually configured as input or output. Figure 11-1 illustrates the chip sitting on a breadboard.

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Detectors for UV Measurement — State of the Art and New Developmentshotomultipliers as well as biological and chemical detectors. Spectral responsivities, non-linearities, noise, dark signals and stabilities are traits of the sensors. For the measurement of irradiance and exposure an input optic is placed in front of the sensor, i.e. fiber bundles, transmitting or r

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