The memristor discovery board is a low-cost programmable interface for exploring memristor behavior. The board plugs into the Digilent Analog Discovery 2 (sold separately), an affordable ‘all in one’ multi-function instrument that allows users to measure, visualize, generate, record, and control mixed signal circuits.
Digital IO channels 0-7 activate analog switches that couple memristors to the AD2 waveform generator and two oscilloscopes. On LEDs indicate closed switches. Easy access test-points and pin sockets allow for coupling of the circuit to additional measurement equipment and bread-boards. A lever-actuated DIP socket provides zero insertion force to prevent handling damage of chip pins.
|Two-channel oscilloscope||1MΩ, ±25V, differential, 14-bit, 100Msample/sec|
|Two-channel arbitrary function generator||±5V, 14-bit, 100Msample/sec|
|16-channel digital I/O|
|2 input/output digital trigger for linking multiple instruments||3.3V CMOS|
|Two programmable power supplies||0…+5V , 0…-5V|
The Analog Discovery 2 was designed for students in typical university-based circuits and electronics class. It’s features and specifications were obtained from feedback from professors at several universities and include USB control and power, small and portable form factor, robustness to withstand student abuse, and low-cost.
Software is open-source and available at https://github.com/knowm/memristor-discovery
|Name||Description||Blue=Cathode/Yellow=Anode, 200mV/500ns per grid tick||Blue=Cathode/Yellow=Anode, 200mV/500ns per grid tick|
|V0 ADG512||Populated with Analog Devices ADG512 analog switches (11 pC Charge Injection, 50 Ω Ron). Charge injection has been observed to cause voltage transients that exceed memristor threshold and affect memristor state during switch selection. This is not a problem for experiments on individual memristors, but can present a problem for programming multiple devices, as the act of selecting a device may disturb it’s state.||ADG512 Switch Voltage Transients on Open||ADG512 Switch Voltage Transients on Close|
|V0 DG445DY||Populated with Vishay Siliconix DG445 analog switches (-1 pC Charge Injection, 100 Ω Ron). Resolves voltage transients observed with the ADG512 switches.||DG445VY Switch Voltage Transients on Open||DG445VY Switch Voltage Transients on Close|