All Questions
Tagged with load voltage-regulator
14
questions
0
votes
1
answer
76
views
Is there a way to match multiple load impedances with one circuit
My goal is to create a test fixture that can provide multiple voltages such as +-24 volts DC to multiple devices with different input impedances for each device. The ranges of input impedances are ...
- 1
0
votes
2
answers
60
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Does the lm317TG require a load resistor in the final design or just for testing?
I'm building variable voltage regulator, the regulator has levels of 9, 12, 15 and 18 volts and a potentiometer that allows for incremental adjustment between the levels, so at level 18v you can drop ...
- 107
0
votes
3
answers
319
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That Wall Warts Dilemma
I have a bunch of wall warts of widely varying DC output voltages. I find that they almost invariably show a no-load (or low-load) DC voltage considerably higher than their stated rating. I'm ...
- 113
2
votes
1
answer
268
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Programmable Power Supply Design: Issues with variable load and voltage stability
TL;DR: How can I stabilize/regulate an output voltage coming from a DAC and use it to drive a load?
Long-time web-searcher/lurker, first time poster.
I've been designing an automated test station for ...
- 41
1
vote
1
answer
1k
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Capacitance multiplier with voltage regulator
I am trying to make a low noise voltage regulator.
My concept is to use a symmetrical regulator using LM338 followed by capacitance multiplier (ESP version).
According to Rod Elliot from ESP, the ...
- 45
0
votes
1
answer
1k
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Off-load voltage of wall-warts
I need to regulate an incoming DC supply from a wall-wart down to 5 volts. I'm experienced with designing power supplies with ordinary transformers. In this situation, the maximum voltage I can expect ...
- 221
-4
votes
1
answer
221
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Input voltage drop [closed]
I have a circuit, the characteristic of the load is unknown, most probably resistance and capacitance, the input for the circuit is %v and frequency is varying from 10 Hz to 30 MHz. once the input ...
1
vote
1
answer
2k
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Step Down Regulator - Output voltage unstable/voltage drop with load
I'm currently trying to build a USB charger device for my mobile phone using an old 12V car battery as power source. I purchased different step down modules (see below) to regulate the voltage from ...
- 79
0
votes
2
answers
1k
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ADC Value from load cell to MSP430 not correct
I have a 1000lb load cell (LC302 from omega) being fed through an INA125 OPAMP then to the ADC10 of a MSP430G2553 with 2.5V as reference.
2.5V is coming out of the OPAMP that's being fed into the ...
- 321
2
votes
1
answer
2k
views
Boost converter can't power load. What are the limitations?
I'm trying to power a nixie lamp with a 9 volt battery. The boost converter charges up to 160vdc, the nixie lights, but quickly goes out (or half lights) as it pulls more current ~= 5mA. My boost ...
user3657
6
votes
2
answers
1k
views
Voltage regulator misbehaves under certain conditions
Okay guys, this one has me baffled. Take these two circuits:
Typical stuff; Power in goes to the + rail, GND to the - rail. This is a 19V power supply going in. It goes through the voltage regulator (...
- 241
1
vote
1
answer
1k
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LT3080 regulator question
The datasheet of the LT3080 voltage regulator says that "For true zero voltage output operation, this 1mA load current must be returned to a negative supply voltage."
What exactly does this mean? How ...
- 757
10
votes
2
answers
1k
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Is this normal Buck Regulator behaviour?
I recently got around to trying out buck regulators, my results weren't what I was expecting though. For one the ripple voltage seems a little high to me, It's about 800mV with no load and goes up to ...
- 2,525
2
votes
4
answers
3k
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Hand crank DC generator - a simple dummy load that won't burn out?
I'm working on a project that allows a user to crank a hand generator while current and voltage sensors measure the output. After the user finishes cranking, software displays information about how ...
