Please find in this repository the firmware and hardware required for an FES controler, designed as an submodule to existing rehabilitation systems. The firmware is designed to have a high capacity for external communication, such that the FES submodule designed can communicate with existing systems.
PCB:
Schematic:
BOM:
| Schematic Reference | Item | Quantity | Cost (Individual) | Cost (Total) |
|---|---|---|---|---|
| R1 | 10k (5%) SMD Resistor (0805) | 1 | $0.176 | 0.176 |
| R3,R7,R8 | 100 (5%) SMD Resistor (0805) | 3 | $0.743 | 2.229 |
| R4,R5 | 10 (5%) SMD Resistor (0805) | 2 | $0.135 | 0.270 |
| R6 | 1 (5%) SMD Resistor (0805) | 1 | $0.297 | 0.297 |
| R9 | 3.6k (5%) SMD Resistor (0805) | 1 | $0.176 | 0.176 |
| RV1 | 2K Potentiometer (3296W) | 1 | $2.350 | 2.350 |
| C1,C2,C3,C4,C7,C14 | 0.1u (20%) SMD Capacitor (1206) | 6 | $0.176 | 1.056 |
| C5 | 4.7n (10%) SMD Capacitor (0603) | 1 | $0.621 | 0.621 |
| C6,C10 | 470uF Electrolytic Capacitor | 2 | $2.160 | 4.320 |
| C8 | 1u (10%) SMD Capacitor (1206) | 1 | $0.203 | 0.203 |
| C9,C11,C12,C13 | 10u (10%) SMD Capacitor (1206) | 4 | $0.311 | 1.244 |
| U1 | STM32L432KB | 1 | $8.140 | 8.140 |
| U2 | TL072 | 1 | $1.730 | 1.730 |
| U3 | MMPQ2907A | 1 | $2.520 | 2.520 |
| U4 | INA240A3PW | 1 | $4.670 | 4.670 |
| Q1 | BC547B | 1 | $0.648 | 0.648 |
| S1 | HV2601 | 1 | $28.620 | 28.620 |
| PS1 | MCP1700-3302E | 1 | $0.581 | 0.581 |
| PS2 | RH-0515D | 1 | $11.110 | 11.110 |
| PS3 | R05-100B | 1 | $65.160 | 65.160 |
| J1,J3 | Screw Terminal (x2) | 2 | $1.320 | 2.640 |
| J2 | J-Link Header | 1 | $0.851 | 0.851 |
| J4 | Screw Terminal (x8) | 1 | $8.880 | 8.880 |
| J5 | Screw Terminal (x3) | 1 | $2.000 | 2.000 |
| Total Cost | 150.492 |
The firmware for the project uses FreeRTOS to run all wave generation and external communication tasks.
Firmware Overview:
Task Transitions Overview:
