Column: Optical isolation


Figure 2: Module 1’s connections to an MCU Figure 3: VOUT vs. VIN for modules 1 and 2


Figure 4: Module-1’s prototype circuit board – top and


bottom views


Figure 5: Optically- isolated 0-5V analogue input module 2, for use with the ADC input of a 5V microcontroller


Table 1:


Example input and output voltages for modules 1 and 2. 5.0X: a value from 5.01V to 5.07V, due to LM358P-1A’s characteristics


12 March 2022 www.electronicsworld.co.uk


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