524 Analog Current Comparator
524 : Analog Current Comparator
- Author: Renaldas Zioma
- Description: An analog current comparator with Excitatory (+) and Inhibitory (-) currents formed by summing up digital inputs
- GitHub repository
- Clock: 0 Hz
How it works
A current comparator that compares 2 currents each formed by a sum of 8 digital pins.
How to test
Set the 8 inputs to form current A and 8 bi-directional inputs to form current B. The ouptut analog voltage is the result of the comparison operator (sigmoid).
External hardware
A multimeter to measure the output voltage on analog pin 0.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Inhibitory current bit | Excitatory current bit | |
| 1 | Inhibitory current bit | Excitatory current bit | |
| 2 | Inhibitory current bit | Excitatory current bit | |
| 3 | Inhibitory current bit | Excitatory current bit | |
| 4 | Inhibitory current bit | Excitatory current bit | |
| 5 | Inhibitory current bit | Excitatory current bit | |
| 6 | Inhibitory current bit | Excitatory current bit | |
| 7 | Inhibitory current bit | Excitatory current bit |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | B4 | 10 | Main comparator output |
| 1 | B1 | 7 | Summed currents (debug) |
| 2 | B3 | 9 | 2nd comparator input (debug) |
| 3 | B2 | 8 | 2nd comparator output (debug) |