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Low dropout adjustable voltage regulator
Low dropout adjustable voltage regulator
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Old 10th June 2021, 10:23 PM   #1
caraudioguy2100 is offline caraudioguy2100
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Join Date: Aug 2010
Default Low dropout adjustable voltage regulator

Iím working on a Taramps 15k amp .

The amp shows no signs of life : no leds lite up no rail or regulated voltages and and the power supply isnít booting up .

I know that the pic chip needs to see 5 volts in order to operate.

I have 5 volts on pin 1 of the pic chip

Iím wondering if something needs to tell the pic to turn on .

Which leads me back to the LM2941S regulator .

Here are the voltages I get on that regulator not sure if the voltages are correct or not. Anyone know ?

Adjust Pin :1.27

On/off Pin: 0.00 volts when remote is applied. And goes to 6.23 volts when remote is removed

Ground:0.00

In Pin :0.00
Out Pin: 5.13


Wondering if these voltages appear to be correct on this or do I have a problem somewhere
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Multimeter:Klein Tools MM6000 Hakko FX-888D soldering station Hakko FR-300 desoldering gun dual channel oscilloscope 2 ohm 100 watt resistor Pyramid 40 amp power supply and a kenwood KDC-248U fornsiganl source . M02020 Testoscillator
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Old 11th June 2021, 03:43 PM   #2
Perry Babin is offline Perry Babin  United States
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Join Date: Nov 2003
Location: Louisiana
Are there any pulses on any terminal of the PIC?

According the the datasheet, the regulator is working correctly.
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Old 14th June 2021, 03:28 AM   #3
caraudioguy2100 is offline caraudioguy2100
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Join Date: Aug 2010
I dont get any pulses out of the pic
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Multimeter:Klein Tools MM6000 Hakko FX-888D soldering station Hakko FR-300 desoldering gun dual channel oscilloscope 2 ohm 100 watt resistor Pyramid 40 amp power supply and a kenwood KDC-248U fornsiganl source . M02020 Testoscillator
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