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Questioning about circuit diagram send at post 23
1. This circuit provide good current limiting and
2. 5A current provide at all voltage range 1.2 to 30V and
3. good voltage regulation from 1.2 to 30V
4. if 0-30V instead 1.2-30V than...
This circuit provide good current limiting and
5A current provide at all voltage range 1.2 to 30V and
good voltage regulation from 1.2 to 30V
if 0-30V instead 1.2-30V than modification on circuit
if lm338 configured as voltage reglator than voltage drop across it = ?
where 4.2V drop
2V drop across IC 1 that for current limiting/regulating
0.7V drop across BE resistor
2V drop across IC 2 that for voltage regulating
i am right or not
if input voltage 38V than 4.7V drop acrosss these the output will vary easily 1.2 to 38-4.7 = 33.3V
yes or not
than any idea for increasing current
and tell me that this circuit provide good current limiting and
5A current provide at all voltage range 1.2 to 30V and
good voltage regulation from 1.2 to 30V
if 0-30V instead 1.2-30V than modification on circuit
Attatch diagram
first circuit is use for current limiting
transiter is use for current increasing transistor current provide 5A at all voltage range 1.2-30V
this circuit is good
better
best
or not
ok
my mean that if using transistor current increasing method for lm317 or lm338 regulator ic than this method ok or not because volatge vary from 1.2 to 30 v
7805 or 7812 is fixed regulator
I Attatch Diagram
if i use digital pot by replacing R2 that ok or not
and if digital pot using in variable power supply by changing voltage and current than ok or not
please send digital pot ic nos that available in market
if i use cd4066
1. this ic Open or close the resistor like other sitches (mean short and maximum current flowing)
2. if short than max current handle
3. if short than max Voltage handle = 15V or greater if i use 5V supply for ic than switch 15V can handle or not
i try to buy a digital pot but not meet digital pot
NO
DS1803
AD7376
if meet the digital pot in market than this lower position only 64 position digital pot
i trying a fixed resistor to variable resistor using no of fixed resistor and control using switches
these resistor 1,2,4,8,16 in steps
mean using fixed resistor control digital mode