Circuit for Photodiode-Pi Interface

Here’s a diagram I did today for the interface between the photodiode and the Raspberry Pi. First, the photodiode allows small amounts of current to flow when light is shone on the device. this current is amplified by the BJT (so, just a normal transistor really) and a proportional voltage  is produced across R2. This is fed …

Circuit for Photodiode-Pi Interface Read More »