How to build an Artificial Synapse

The video below shows how to build artificial synapses on breadboards using LEDs as an optocoupler.

Most biological neurons have thousands of connections to other synapses and each connection forms a synapse. When building artificial neurons artificial synapses are likely needed to connect to other neurons.

Each synapse consists of an inverter, an optocoupler made with two LEDs, an output buffer, a diode, and a variable resistor. If the synapse is inhibitory, a discharge transistor also needs to be added.

Each synapse either adds or removes charge from the postsynaptic neuron. For these synapses to be functionally equivalent to biological sells a proportional number of states needs to be transferred compared to the same biological network. The video above describes this in much more detail.

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