PCB of hardware neural network (IMAGE) University of California - San Diego Caption A custom printed circuit board built with an array of activation (or neuron) devices and a synaptic device array. Credit Sangheon Oh/Nature Nanotechnology Usage Restrictions Please credit: Sangheon Oh/Nature Nanotechnology License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.