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June 26, 2024 02:23
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discharge of 1.5F supercapacitor back through protection Schottky diode into solar panel
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| at 5pm the cell had 3.52 volts. Left connected to charging 5V solar panel though Schottky protection diode, but it seems alter at 11:40pm the super capacitor had discharged down to only 2.99 volts though that diode. So maybe ideal diode is needed instead. |
at 3:09pm 6/22/2024, a unconnected 1.5F supercap is at 2.89V. Will leave disconnected (just connected to 10 Mohm probes) and see later value.
at 11:18pm, that 1.5F supercap dropped from 2.89 V to 2.76 V (it was still connected to 10 Mohm oscilloscope probe).
at 12:21am, that was down to 2.75 V
at 9:53am, that was down to 2.64 V
by 1:17 on 6/24, the voltage was down to 2.33 V
12:38pm on 6/25, the voltage mostly held at 2.32 V
at 7:20pm was 2.29 V
at 10:23pm was still 2.29 V
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22 minutes later at 11:02am left connected to panel (indoor light) and now has 2.86V. So about 100 mV charged over 22 minutes.