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STD LED Dimmer

Project Status: Ongoing

License: Public Domain

  • 1.9k
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  • 8
Creation time: 2018-04-03 10:28:58
Update time: 2022-03-01 18:51:12
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** ![pwm1.gif](//image.easyeda.com/pullimage/0iJsTEAk49wUjvyXQzvTHPv1PzZTLuy3SAzGAvNu.gif) TODO: Calculate efficiency at different load currents and put a graph here.
Design Drawing
schematic diagram
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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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