A Fuse is does not react as fast as a Current-Limiting-Circuit.
If You depend on a Fuse blowing,
You could "blow" some other component before the Fuse finally blows.
And, replacing Fuses is a pain.

Power-Supplies are quite often more important than the Circuits they are Powering.
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It's like people started calling all cars "fasts" whether they are fast or not.

Sorta like back in the day when all record players were called HiFi.

 

When did all regulators start being LDOs? LDO (low drop out) is not even a noun it is an adjective. And 7809 is not an LDO regulator. It's like people started calling all cars "fasts" whether they are fast or not.

Never. It was my mistake because at the beginning I was going to use an LDO. As simple as that.

I humbly changed the title of the topic so that no one feels offended

 

Do you realize that if you use a 78L09 you get 100 ma current limit (plus thermal) protection free? I see these on one from my nearby distributor for about U.S 10¢ each.

 

Or all the carbon-zinc batteries were “heavy duty”.

Sorta like back in the day when all record players were called HiFi.

 

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Do you realize that if you use a 78L09 you get 100 ma current limit (plus thermal) protection free? I see these on one from my nearby distributor for about U.S 10¢ each.

I realize, yeah. I'll will use the same pcb for a 9V 400mA though (And yeah I realize that I'll have to adapt the heatsinks for 400mA too).