Basic speed control PCB¶
The basic speed control PCB uses Pulse Width Modulation (PWM) to control the speed of a 3.3V DC motor. The design is based on the LTC6692 voltage controlled pulse width modulator.
PCB Bill of Materials¶
| Qty | Pos | Description | Vendor | Part # |
|---|---|---|---|---|
| 1 | SW1 | Slide switch | Digikey | CKC5102-ND |
| 1 | RV1 | Right angle potentiometer | Digikey | P3T9103-ND |
| 1 | C1 | Capacitor 0.1uF | Digikey | 1276-1258-1-ND |
| 1 | D1 | Diode, schottky (fast resp) | Digikey | 641-1332-1-ND |
| 2 | P1,P2 | terminal block, 3.5mm vert | Digikey | ED2635-ND |
| 1 | Q1 | npn transistor | Digikey | FMMT619CT-ND |
| 1 | R1 | Resistor 23.2k | Digikey | P23.2KHCT-ND |
| 1 | R2 | Resistor 976k | Digikey | RMCF0603FT976KCT-ND |
| 1 | R3 | Resistor 1k | Digikey | RMCF0603JT1K00CT-ND |
| 1 | R4 | Resistor 124k | Digikey | 311-124KDCT-ND |
| 1 | R5 | Resistor 182k | Digikey | 541-182KHCT-ND |
| 1 | R6 | Resistor 36 ohm | Digikey | 311-36GRCT-ND |
| 1 | D2 | LED indicator, blue | Digikey | 160-1827-1-ND |
| 1 | U1 | Voltage controlled PWM | Digikey | LTC6992CS6-1#TRMPBFCT-ND |