Timeline for LM317 Sealed lead acid charger
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Jun 18, 2017 at 17:15 | answer | added | Harper - Reinstate Monica | timeline score: 2 | |
| Jun 18, 2017 at 16:08 | history | tweeted | twitter.com/StackElectronix/status/876471651755585536 | ||
| Jun 18, 2017 at 10:28 | vote | accept | jm11011 | ||
| Jun 18, 2017 at 10:23 | history | edited | pipe | CC BY-SA 3.0 |
deleted 22 characters in body
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| Jun 18, 2017 at 9:42 | comment | added | jm11011 |
oops, an oversight in joining using the eda at hand. On breadboard, output of U1 is connected after R1. Pulling around 800mA, I would be dropping almost 2V across U1 and U2 each. D1 drops around 0.6V at 25°C, corrected to 0.8V for my application. I guess I didn't consider R1 since I thought it is part of the U1 voltage drop. Either way, I have almost 4V margin from input to output. I can measure the voltage drop all over and post again if desired.
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| Jun 18, 2017 at 9:34 | answer | added | Neil_UK | timeline score: 6 | |
| Jun 18, 2017 at 9:05 | comment | added | Transistor | (1) Shouldn't your U1 pin 1 go to the other side of the current sense resistor R1? (2) Have you added up all the voltage drops across U1, R1, U2 and D1? Is there enough left to reach your charging voltage. (I'm only asking. I haven't done the sums.) | |
| Jun 18, 2017 at 8:59 | history | asked | jm11011 | CC BY-SA 3.0 |