| TOPICS |
Techniques covered |
Syllabus ref. (OCR) |
Input module |
Output module |
| CONTROL OUTPUTS |
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| 1: Basic Counter - counts in binary and displays an output |
Counting loops
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5.4.5 g(i)
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| 2: Light sequencer - uses indirect addressing to access a table. |
Indirect addressing
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| 3: Bounce game - A simple game testing your reactions. |
Masking input bits
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| 4: Quiz master - A 4 player Quiz Master that displays the first contestant to press a button within 5 seconds. |
5.4.5 g(ii)
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DAIP opt.
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Q2DD
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| DRIVING 7-SEGMENT DISPLAYS |
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| 1: Alpha-numeric display - a single digit messaging program |
Indirect table addressing
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5.4.5 g(ii)
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QSDD
single 7seg.
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| 2: 4-bit Binary to Seven Segment Decoder - software version of a common IC |
Driving 7-segment display
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| 3: Digital Dice - produces a number from 1 to 6 |
Masking input bits
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5.4.5 g(iii)
|
DAIP module (optional)
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| 4: Random Number Generator - produces a lottery number from 1 to 49 |
Number comparison
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Q2DD
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| 5: 99 Second Timer - uses fixed length routines for accurate timing |
Fixed timing routines
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6: Improved 99 Second Timer - has start/stop and reset facility for timing external events using input sensors.
Eg. Scalectrix or falling object timer |
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| MOTORS & SERVOS |
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| 1: Stepper controller - Produces the required signals to control a bipolar stepper motor |
Indirect table addressing
|
5.4.5
g(v,ix)
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QSMD
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| 2: PWM Controller - Control the speed of motors or the brightness of bulbs |
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| Servo controller |
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| SENSING SYSTEMS & CONTROLLING RELAYS |
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| Greenhouse controller |
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5.4.5 g(v)
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QRLA
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| Data Logger |
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| ANALOGUE/DIGITAL |
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| 1: Digital Wave Generator - design and produce digitised waveforms. |
Indirect table addressing
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5.4.5 g(vi)
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QDAC
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| Thermometer |
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DADC
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Q2DD
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| 3: Voltmeter - Measures voltages from 0 to 1.27v in 10mV steps. Add a 1/10 potential divider to increase the range to 12.7v |
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DADC
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Q4DL
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