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Does the diode need to be a schottky ?

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Externet

Well-Known Member
Hi.
The diode D1, does it need to be a Vf~0.45 V for the circuit to keep the load off at daylight ?
Circuit is meant to turn 'load' on dusk to dawn and recharge cell from solar panel dawn to dusk. Look at the schematic only; text is chineseconfuser.
1615743761157.png
 
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A normal silicon diode will work but it drops the voltage from the solar cell by a bit more than a Schottky diode. (About 0.2 volts more than a Schottky diode.)
I would NOT advise using that circuit with a lithium battery as there is no control of the charging voltage and current.

Les.
 
This picture is from a recent Big Clive video. The 18650 cells in two solar-powered LED lights burst out the end of the lights, apparently from not having any battery protection circuits.

Screenshot_20210314-124855_YouTube.jpg
 
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