Edexcel GCSE Design and Technology · 1DT0
Specification 1.6.1, 1.7.3 · Paper 1
Revise: SensorsThe control circuit detects this change and switches the lamp on when the light level falls below a chosen threshold. When daylight returns, the LDR’s resistance falls and the circuit can switch the lamp off. The LDR senses the light; the lamp is the output.
- Revise: Processing Analogue Inputs
A value against which an input reading is compared to decide which response a program should produce.