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Old 22nd August 2011, 07:19 PM   #1
FOXYE is online now FOXYE  Israel
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Default WTB: Salas low voltage shunt regulator

Want to buy a ready Salas low voltage shunt regulator in 5V and 3.3V vout version.
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Old 24th August 2011, 07:56 AM   #2
FOXYE is online now FOXYE  Israel
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Old 25th August 2011, 01:49 PM   #3
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Isn't so easy: you need to know the load power consumption? what version do you want or need? why don't fill up the Tea-Bag GB for the new BiB version, Salas will guide you in his specific thread to have success.
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Old 26th August 2011, 03:11 PM   #4
qusp is offline qusp  Australia
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not so easy to get 3v3 out with 5v in either
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Old 27th August 2011, 09:45 AM   #5
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I believe he want two regs: one 5Vout & other 3.3Vout
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Old 29th August 2011, 03:00 PM   #6
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Old 29th August 2011, 03:23 PM   #7
AndrewT is offline AndrewT  Scotland
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Does it have to be a Shunt Regulator?

A 317 with the lower resistor replaced by a LED can give 3.3V.

Adjust the current through (and thus the voltage of) the LED by changing the upper resistor value.

I used 100r for ~12mA and the reg puts out 3.31V with input varying from 5.5V to 31V

I don't need to trim my 3.31V must replacing the 100r with 150r or 240r with reduce the LED Vf and thus reduce the regulated output voltage.

Add a second LED for 5V output.
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