T TheSwede73 New Member Jun 9, 2009 #1 Hi! Does anyone have a simple schematic of a pwm dimmer for led? It's supposed to dim up to 6 clusters of 19 leds each, the lamps have resistors and everything built in so i just need the dimmer, 12V. Thanks!!
Hi! Does anyone have a simple schematic of a pwm dimmer for led? It's supposed to dim up to 6 clusters of 19 leds each, the lamps have resistors and everything built in so i just need the dimmer, 12V. Thanks!!
Chippie Member Jun 10, 2009 #2 How about a 555 timer chip configured as a pwm running from a 12v supply with a suitably rated mosfet to handle the current.. I Googled and got this:**broken link removed** replace the motor with your led Last edited: Jun 10, 2009
How about a 555 timer chip configured as a pwm running from a 12v supply with a suitably rated mosfet to handle the current.. I Googled and got this:**broken link removed** replace the motor with your led
P pcbheaven.com New Member Jun 10, 2009 #3 Remove from **broken link removed** the 470uF capacitor and it's ready.
Boncuk New Member Jun 10, 2009 #4 pcbheaven.com said: Remove from **broken link removed** the 470uF capacitor and it's ready. Click to expand... Why completely remove it? 47µF is always good with an NE555.
pcbheaven.com said: Remove from **broken link removed** the 470uF capacitor and it's ready. Click to expand... Why completely remove it? 47µF is always good with an NE555.
P pcbheaven.com New Member Jun 10, 2009 #5 Boncuk said: Why completely remove it? 47µF is always good with an NE555. Click to expand... Because this capacitor is used for the fan to remove the noise of pwm kicking sounds. It is not needed with LEDs at all.
Boncuk said: Why completely remove it? 47µF is always good with an NE555. Click to expand... Because this capacitor is used for the fan to remove the noise of pwm kicking sounds. It is not needed with LEDs at all.