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1.Easy to use and quick to get started
2.The process supports design scales of 300 devices or 1000 pads
3.Supports simple circuit simulation
4.For students, teachers, creators
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1.Brand new interactions and interfaces
2.Smooth support for design sizes of over 5,000 devices or 10,000 pads
3.More rigorous design constraints, more standardized processes
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Ongoing
STD LED Dimmer
License: Public Domain
Mode: Editors' pick
- 9
Update time：
2022-03-01 18:51:12
Creation time：
2018-04-03 10:28:58
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.
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity | Manufacturer Part | Mounted | |
|---|---|---|---|---|---|---|---|
| 1 | LEDOUT | LEDOUT | CONNECTOR 5.0MM | 1 | 2.54-1*2PFemale | Yes | C49661 |
| 2 | NE555DR | U2 | SOIC-8_150MIL | 1 | NE555DR | Yes | C7593 |
| 3 | VIN | VIN | CONNECTOR 5.0MM | 1 | 2.54-1*2PFemale | Yes | C49661 |
| 4 | 100R | R3 | 0603 | 1 | RS-03K1000FT | Yes | C115420 |
| 5 | NCE3018AS | Q1 | SOP-8_150MIL | 1 | NCE3018AS | Yes | C163739 |
| 6 | 1uF | C1 | 0603 | 1 | 0603X105K160NT | Yes | C89188 |
| 7 | 1k | R4 | 0603 | 1 | WR06X1001FTL | Yes | C112433 |
| 8 | M4 | D2,D1 | SMAF | 2 | M4 | Yes | C164158 |
| 9 | 50K | R2 | RES-ADJ_EVM3X3 | 1 | EVM3ESX50B54 | Yes | C11962 |
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