An automated greenhouse ventilation system activates a fan when the system is active and either the temperature is high or the humidity is high.
Table 1 shows the truth table for this system with inputs:
- S (System Active: 0 = Deactivated, 1 = Activated)
- T (High Temp: 0 = Normal, 1 = High)
- H (High Humidity: 0 = Normal, 1 = High)
- Output F (Vent Fan: 0 = Off, 1 = On)
Table 1
| System Active (S) | High Temp (T) | High Humidity (H) | Vent Fan (F) |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 |
| 0 | 1 | 0 | 0 |
| 0 | 1 | 1 | 0 |
| 1 | 0 | 0 | 0 |
| 1 | 0 | 1 | 1 |
| 1 | 1 | 0 | 1 |
| 1 | 1 | 1 | 1 |
Draw the logic circuit that represents the truth table in Table 1. You must use standard symbols for logic gates.
Boolean logic Questions
Practise AQA GCSE Computer Science Boolean logic with exam-style questions for GCSE Computer Science. 83 questions, matched to the AQA GCSE Computer Science (8525) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.