How to adjust the current limit ?

Thread Starter

Externet

Joined Nov 29, 2005
1,960
Hello. In this schematic,

1656125244599.png
R1 sets the voltage regulation ? How to adjust the current limiting ? Is there missing components ? Is Q2 emitter hooked to R4, R1, RL ?
 

Thread Starter

Externet

Joined Nov 29, 2005
1,960
Thanks. Just semantics : the "drop" across R4 could be the 'voltage buildup across R4' , right ?

I hope to find a rheostat to adjust R4 for variable limiting to 5 - 15 Amperes
 

crutschow

Joined Mar 14, 2008
31,126
That Ohmite 0.5Ω pot is rated for 50W, so the nominal maximum current is 10A.
You might be able to operate it at lower resistance setting with 15A but it would me marginal.
 
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