
Opto 183
Figure
6.9 Block diagram of the PC404 Evaluation Kit for the TSL214 64 pixel
integrated array
This consists of a TSL214, a circuit board with drive and output circuitry,
and a detachable
1
Ox
magnification lens in a housing. The circuity of the
PC404 comprises an oscillator, a counter/divider, a one-shot pulse generator
and a comparator. The oscillator is built around a 555 timer and generates
a 500 kHz output data clock pulse. The clock output of the oscillator is
routed also to a 74HC4040 divider. This has a set of jumper terminals to
four of the outputs, and 1, 2, 4 or 8ms integration time may be selected.
The selected output i