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Solar panel li-po low power charger for esp8266

2 years ago 1954
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Solar system power for esp8266 device like weather sensor. You need 5V 0.15W solar panel and small li-po battery for example 200mAh. Zener diode stabilizes voltage on 4.3, schottky diode give 0.15-0.2V voltage drop because 4.3V is too much for li-ion battery and prevents lekage current from battery. You can use panel also like binary(0/1) light sensor.

Keep It Simple Stupid Not tested yet.




ID Name Designator Footprint Quantity
1 a0cbe4eb9b394588a69cd3e14d75496a U2 NONE 1
2 ccbcc28c788e211f4c459153861ea19d D1 DO-41 1
3 b3dc243a4ad382fee4b6f98728ef5490 D2 DO-35 1
4 c0c9b9d8f4c944deb66ff4926976f774 BT1 LIPO 1
5 d120b09cf8cf47d28f2202b2c5e9c5da U1 TO-92(TO-92-3) 1
6 fa8b025fe45b46549086481cdb6fa68f C1,C2 RAD-0.1 2
7 5dc3888d7da84bfe8bf225c4e2cbce7f C3 CAP-D3.0XF1.5 1
8 5ba509f895244278a1309c0031b47188 R1 AXIAL-0.3 1
9 5ba509f895244278a1309c0031b47188 R2,R3,R4 AXIAL-0.3 3
10 b5953d65a4054165b11dfc39ebcbd953 U3 ESP-12F(ESP8266MOD) 1
11 089f853e15684e2f92ea6c2d29604ec9 SW1 KEY-6.0*6.0-4 1
12 089f853e15684e2f92ea6c2d29604ec9 SW2 KEY-6.0*6.0-4 1




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