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Battery charger & indicator circuit
Hello again I got three old type SUNCA sealed lead acid rechargeable batteries each of 4v 1.0Ah & 1 Amp voltage regulation Cycle use : 5.00v-5.20v Standby use : 4.70v-4.90v maximum charging current : 0.21A Now i am combining all the three in series...- rajrocks
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- Replies: 0
- Forum: Power Electronics
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LED's unknown forward voltage & current measurements
aah awsome sir hats off to you , it solved my 50% problem :) Sorry for late reply as i was busy in my shows . . thanks for the support & let me go through it fully :o thanks once again- rajrocks
- Post #12
- Forum: LEDs and Optoelectronics
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LED's unknown forward voltage & current measurements
hmm ya thats look like a preety cool idea what i want to know for proceeding :) thanks sir & ya i have regulated variable supply starting from 1.5 volts to 12 volts max & have a digital multimeter with bread boards etc etc , just i ve to follow your suggestions above very carefully Sir one...- rajrocks
- Post #10
- Forum: LEDs and Optoelectronics
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LED's unknown forward voltage & current measurements
no sir heat sinks are not provided with power LEDs Sir too you told above "measure the voltage at 20mA" So here how to apply 20 mA ? i mean would you please tell me practical step in short ? actually i didn't get that as i am begining with very basic- rajrocks
- Post #8
- Forum: LEDs and Optoelectronics
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LED's unknown forward voltage & current measurements
:) woww sir its nice to know much about these hidden matters about LEDs well i don't know much but i have 3 mm orange colour (round type) 5 mm white,red,blue,green (round type) 10 mm white (straw hat type) & small power LEDs (as you said,so i identified one) below here are images of...- rajrocks
- Post #7
- Forum: LEDs and Optoelectronics
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LED's unknown forward voltage & current measurements
hehe nice idea ya sir i don't have any specification as i purchased 2 or 4 as per use & grt it from the present lot available in any electronic shop . . They are not dealer so don't have any details about any electronics device in my area . . Here as you explained i can afford to burn up more...- rajrocks
- Post #4
- Forum: LEDs and Optoelectronics
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LED's unknown forward voltage & current measurements
Hello everyone I want to know the practical method of finding forward voltage & current for a given unknown LED . . please help me . . Thanks :o- rajrocks
- Thread
- Replies: 11
- Forum: LEDs and Optoelectronics
