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Vukovar Solar V2

2 years ago 209
  • Description
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Description

A remote-controlled PWM power management board for small (10 W - 20W) solar panels, connected to either lead-acid batteries, or trickle-charged Lithium ones (12 V target in both cases). Designed to be as much through-hole as possible, and to only use LCSC components.

Has MOSFET-controlled outputs, most of which are PWM-capable.

The circuit is designed for about 3A max current on any single line, including the solar & battery ones.

PCB designed for this enclosure: https://www.aliexpress.com/item/5PCS-Plastic-Electronic-Project-Box-Shell-Case-Enclosure-Instrument-Case-100x60x25mm-10x6x2-5CM/32850410579.html

This version uses PWM to keep the battery charged. The exact algorithm and voltages are set in firmware.

There are ports for a 433 MHz ASK/OOK receiver module, HC-06 Bluetooth module, and a HC-12 module (sharing ports with the Bluetooth module), as well as for an I2C OLED display and an AM2320 temperature & humidity sensor.

Documents

Sheet_1

PCB

BOM

ID Name Designator Footprint Quantity BOM_Manufacturer Part
1 ESP-12F(ESP8266MOD) ESP-12F ESP-12F 1 ESP-12F(ESP8266MOD)
2 CON_HEADER_1X03-PTH PROG1 M1X3 1 ?
3 CON_HEADER_1X04 UART1 M1X4 1 ?
4 330uF C1,C3 CAP-TH_BD8.0-P3.50-D1.0-FD 2 330uF 16V 8*12
5 47K R4 RES-TH_BD2.4-L6.3-P10.30-D0.6 1 RNU18F4702A520NH
6 LM2596S-5.0/TR LM2596 TO-263-5_L10.6-W9.6-P1.70-LS15.9-TL 1 LM2596S-5.0/TR
7 1uF C2,C4,C5 CAP-TH_L5.0-W2.5-P5.08-D0.7 3 CD1H105MC9BEF4E000
8 BS170 Q1,Q2,Q3,Q4,Q5 TO-92-3_L4.9-W3.7-P1.27-L 5 BS170
9 33uH L1 IND-SMD_L12.6-W12.6_MCF-13XX 1 GSDRH127PT-330M
10 10K R1,R2,R3 RES-TH_BD1.9-L3.3-P7.30-D0.5 3 MFR0W8F1002A50
11 GL5528(10-20) R5 RES-TH_L5.1-W4.3-P3.40-D0.5 1 GL5528(10-20)
12 SR5100 D1 DO-201AD_BD5.3-L8.4-P12.50-D1.4-FD 1 SR5100
13 HT7333-A_C73726 HT7333 TO-92-3_L5.1-W4.1-P1.27-L 1 HT7333-A

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