MiniSolarMesh
About the MiniSolarMesh PCB
MiniSolarMesh is an open source PCB design by aresta, published on GitHub. It is a 4-layer board measuring 45 × 57.7 mm, with 43 components from 26 distinct parts.
Other key parts include the CN3791, XB8089D0, TLV803EA29 and HT-RA62. By type, the board carries 17 capacitors, 12 resistors, 4 ICs, 3 transistors, 3 diodes and 2 connectors.
It belongs with the power & battery and rf & radio designs in this gallery.
From the project
Minimal LORA Solar Node with MPPT charger, Voltage supervisor and Battery protection
It prevents that the NRF52 gets blocked when the battery is low not being able to reboot when the sun is back. It is also good for the battery life.
To minimize the voltage drop across Q1, it is driven by the CHRG pin of the CN3791. This pin is low while the device is charging, switching on the mosfet completely. During the night the CHRG pin is high and the mosfet is off, blocking the reverse current. It is more efficient than a schottky diode or even a basic ideal diode.
Main components on the MiniSolarMesh
MiniSolarMesh bill of materials (BOM)
43 components, 26 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CN3791 | SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U1 |
| 1 | XB8089D0 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm | U2 |
| 1 | TLV803EA29 | SOT-23 | U3 |
| 1 | HT-RA62 | HT-RA62 | U4 |
| 2 | AO3401 | TSOT-23 | Q1, Q2 |
| 1 | AO3414 | TSOT-23 | Q3 |
| 1 | Solar | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J1 |
| 1 | Batt | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J2 |
| 1 | SW_Push | SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | D_Schottky | D_1206_3216Metric | D2 |
| 2 | LED | LED_0805_2012Metric | D3, D4 |
| 1 | 33u | Inductor_6060_2424 | L1 |
| 5 | 100n | C_0805_2012Metric | C1, C11, C13, C16, C17 |
| 9 | 100u | C_1206_3216Metric | C2, C3, C4, C5, C6, C7, C8, C9 +1 |
| 2 | 470u | CP_EIA-7343-43_Kemet-X_HandSolder | C10, C14 |
| 1 | 220n | C_0805_2012Metric | C12 |
| 1 | 0.1 | R_0805_2012Metric | R1 |
| 2 | 200K | R_0805_2012Metric | R2, R9 |
| 1 | 2K2 | R_0805_2012Metric | R3 |
| 1 | 20K | R_0805_2012Metric | R4 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1k | R_0805_2012Metric | R5 |
| 1 | 220K | R_0805_2012Metric | R6 |
| 1 | 56K | R_0805_2012Metric | R7 |
| 1 | 120 | R_0805_2012Metric | R8 |
| 2 | 1M | R_0805_2012Metric | R10, R11 |
| 1 | 10k | R_0805_2012Metric | R12 |
MiniSolarMesh design files
The KiCad project lives in the aresta/MiniSolarMesh repository on GitHub; these links point at the commit this page was built from.
- LayoutMiniSolarMesh.kicad_pcb
- SchematicMiniSolarMesh.kicad_sch
MiniSolarMesh: common questions
How big is the MiniSolarMesh PCB?
The MiniSolarMesh measures 45 × 57.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the MiniSolarMesh?
43 components, from 26 distinct parts. The full bill of materials is listed on this page.
Where can I download the MiniSolarMesh design files?
From the aresta/MiniSolarMesh repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the MiniSolarMesh design in my own project?
The repository has no license, so all rights stay with aresta. Use it as a reference, and ask the author before reusing the design.
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