High side and low side drivers

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thunderace7

New Member
Hi,
Can you tell me whether the attached circuit will work, please? It is driven, as shown, from a 9v supply, with the Picaxe powered by 5v. The Mosfets are all logic level types except for the P-Channel one (I couldn't find a suitable P-channel logic level mosfet) but I think this might be OK.
The Picaxe is driving both ends of the LEDs.
Thanks.
 

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AllyCat

Senior Member
Hi,

Yes, it looks as if that should work, although it seems "unnecessary" to switch the top end of the LEDs. Also, it looks as if the 10 ohm resistors and the LEDs will all need to be rated to at least 1 watt each (and the power supply to around 10 watts).

Cheers, Alan.
 
T

thunderace7

New Member
That is a simplified diagram. The LEDs are actually in an array and I am switching the top and the bottom to light selected LEDs.
It will be powered by a mains power pack. I might reduce it to 7.5v to minimise wasted power in the resistors. I will be using 2w resistors anyway(because that is what I have).
Thanks for the replies.
Chris.
 
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