Timeline for What resistor to choose for circuit?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Aug 19, 2018 at 18:53 | comment | added | Misunderstood | I like this chip with only a 0.5V drop out. Most CCRs I have seen only work up to 350 mA and have a much higher drop out. Great for high voltage applications. The minimum 5V cuts out a single cell Li-ion. battery. Certainly better than a current limiting resistor for a battery powered LED. | |
| Aug 19, 2018 at 11:49 | comment | added | mend4x | @Neil_UK you mean using batteries as in mobile phones etc.? | |
| Aug 19, 2018 at 10:43 | comment | added | Neil_UK | @neomendax 2xCR2032 batteries will not supply 0.7A, 7mA more like. What people usually do with CR2032s and LEDs is not bother with any resistor at all, the internal resistance of the battery limits the current quite effectively. For 0.7A, you need a rechargable battery, perferrably 3x2v lead acid, 5x1.2v NiMH, or lithiums with a constant current driver. AA batteries might manage 0.7A for a short while. | |
| Aug 19, 2018 at 8:42 | comment | added | Oldfart | Beware that you are throwing away a lot of power ~40% of your batteries energy is wasted on heating the resistor (Which needs to be ~2 Watt) | |
| Aug 19, 2018 at 8:33 | comment | added | mend4x | I'm connecting two 3V CR2032 Lithium batteries in series. The light from 3V only is not pretty enough, and two batteries with twice more capacity should be better I guess. | |
| Aug 19, 2018 at 8:28 | history | answered | Whit3rd | CC BY-SA 4.0 |