will this circuit take 24 volts

Thread Starter

markosillypig

Joined Jul 21, 2008
188
Marko_schematic_20181024.png

hi every one hope you ar all ok

right lets get to it
bought a 4 channel light sequencer off ebay came with a schematic attached
just would like on of the experts check it out for me

it says 12v to a maximum of 18v why ??? i want it to run at 24v for my 24v leds
i have run it for 2 hours at 24v and seems fime to me
just need it checking
thanks
marko

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eetech00

Joined Jun 8, 2013
2,608
View attachment 162269 hi every one hope you ar all ok

right lets get to it
bought a 4 channel light sequencer off ebay came with a schematic attached
just would like on of the experts check it out for me

it says 12v to a maximum of 18v why ??? i want it to run at 24v for my 24v leds
i have run it for 2 hours at 24v and seems fime to me
just need it checking
thanks
marko
Hi

Looks like vds and threshold is ok for the specified mosfet. 78L05 should be ok with 24v input. Looks to me like it will work ok. However, you might want to check the values of the current limiting resistors for the LEDs attached to the drain of each mosfet.

eT
 

Thread Starter

markosillypig

Joined Jul 21, 2008
188
Hi

Looks like vds and threshold is ok for the specified mosfet. 78L05 should be ok with 24v input. Looks to me like it will work ok. However, you might want to check the values of the current limiting resistors for the LEDs attached to the drain of each mosfet.

eT
would changing the max voltage of C2 make a difference ?
thanks
marko
 

bertus

Joined Apr 5, 2008
21,603
Hello,

Changing the leds will not do much.
Red and green leds will have almost the same forward voltage.
Better double the values of R3, R5, R7 and R9.

Bertus
 
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