License
Public Domain
LED Dimmer
- Description
- Documents
- BOM
- Attachments
- Members
- Comments
Description
555 timer based PWM LED dimmer
This project uses PWM to turn on and off a LED (or a strip of them) really fast and changes the duty cycle (Fig.1) so that the human brain perceive it as the dimming of the LED(s). This means that the MOSFET doesn’t have to drop large amount of voltage, this makes the device very energy efficient.
Fig.1
TODO: Calculate efficiency at different load currents and put a graph here.
Documents
V1
V1_PCB
V2_SMD
BOM
| ID | Name | Designator | Footprint | Quantity | Manufacturer Part | Manufacturer | Supplier | Supplier Part | Price | LCSC Assembly | Mounted | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | LEDOUT | LEDOUT | CONNECTOR 5.0MM | 1 | 2.54-1*2PFemale | BOOMELE | LCSC | Yes | C49661 | |||
| 2 | NE555DR | U2 | SOIC-8_150MIL | 1 | NE555DR | TI | LCSC | Yes | Yes | C7593 | ||
| 3 | VIN | VIN | CONNECTOR 5.0MM | 1 | 2.54-1*2PFemale | BOOMELE | LCSC | Yes | C49661 | |||
| 4 | 100R | R3 | 0603 | 1 | RS-03K1000FT | LCSC | Yes | C115420 | ||||
| 5 | NCE3018AS | Q1 | SOP-8_150MIL | 1 | NCE3018AS | Ncepower | LCSC | Yes | C163739 | |||
| 6 | 1uF | C1 | 0603 | 1 | 0603X105K160NT | FH | LCSC | Yes | C89188 | |||
| 7 | 1k | R4 | 0603 | 1 | WR06X1001FTL | Yes | C112433 | |||||
| 8 | M4 | D2,D1 | SMAF | 2 | M4 | Jingdao | LCSC | Yes | C164158 | |||
| 9 | 50K | R2 | RES-ADJ_EVM3X3 | 1 | EVM3ESX50B54 | PANASONIC | LCSC | Yes | C11962 |
Attachments
None
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