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Forum Index : Microcontroller and PC projects : Trying to ID a connector....

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9574
Posted: 07:49am 16 Jun 2025
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This is my prototype PCB layout:





Still playing with the idea, but....
Very small PCB - 43mm x 40mm.
Will easily fit inside the projector.
Smoke makes things work. When the smoke gets out, it stops!
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 7784
Posted: 08:15am 16 Jun 2025
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It's a bit posh! I'd have dug a scrap of veroboard out. lol
Your mosfet should fully saturate with that low a load. RDS(on) will be 0R1 or less so power dissipation will be about 13 milliwatts!
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9574
Posted: 08:48am 16 Jun 2025
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OK, so then perhaps I don't need the copper-heatsink on the drain then!  

I was just thinking that I normally run the projector for many hours before I shut it off, so more copper-pour as a heatsink was better then none.  
Smoke makes things work. When the smoke gets out, it stops!
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 7784
Posted: 09:19am 16 Jun 2025
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It's fine - it won't do any harm to have something to hold the tab down. You almost certainly won't need a lot though.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9574
Posted: 08:41am 18 Jun 2025
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New projector has arrived.

I will just check it powers up and down fine, then I will add the mod.  
Smoke makes things work. When the smoke gets out, it stops!
 
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