SolarMeshtasticNodeMini

h0lad·SolarMeshtasticNodeMini·pcb/SolarMeshtasticNodeMini.kicad_pcb

SolarMeshtasticNodeMini PCB layout, top view — open source board by h0lad

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About the SolarMeshtasticNodeMini PCB

SolarMeshtasticNodeMini is an open source PCB design by h0lad, published on GitHub. It is a 4-layer board measuring 33 × 47 mm, with 35 components from 25 distinct parts.

Other key parts include the BQ25185, HT-CT62, HE9073A30MR, APX803L05-32SA-7 and TPS22917DBV. By type, the board carries 12 capacitors, 10 resistors, 6 ICs, 4 connectors, 2 switches and 1 diode.

It belongs with the power & battery and rf & radio designs in this gallery.

From the project

The SolarMeshtasticNodeMini (ESP32-C3 + Semtech SX1262 + TI BQ25185 Solar Charger) is a minimalistic Meshcore/Meshtastic compatible device.

This is a miniaturized version of the SolarMeshtasticNode.

Specs are the same - with following things removed: - 18650 LiPo case - ADC circuit for VBUS - LEDs

It's fully Meshtastic and Meshcore compatible.

It should theoretically fit into this AliExpress Box: 83x58x34 with a little bit of spare space for a through-hole SMAU.FL connector.

PCB not tested - but inherited from tested SolarMeshtasticNode.

SolarMeshtasticNodeMini, from the project README — From the project README

Main components on the SolarMeshtasticNodeMini

BQ25185 HT-CT62 HE9073A30MR APX803L05-32SA-7 TPS22917DBV SS26_C5350986

SolarMeshtasticNodeMini bill of materials (BOM)

35 components, 25 distinct parts.

Qty	Part	Footprint	Refs
1	BQ25185	SON40P220X200X80-11N	U1
1	HT-CT62	Heltec_HT-CT62	U2
1	HE9073A30MR	SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR-CW	U3
1	APX803L05-32SA-7	SOT23-3	U4
1	TPS22917DBV	SOT-23-6	U5
1	SS26_C5350986	SMA_L4.3-W2.6-LS5.1-RD	U9
1	Conn_01x02_Socket	JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical	J2
2	Conn_01x04_Socket	JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical	J3, J5
1	Conn_01x02_Pin	JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical	J4
1	SSSS811101	SW-SMD_SSSS811101	SW1
1	SW_Push	SMA_L4.3-W2.6-LS5.1-RD	SW2
1	SMAJ14A	D_SMA	D3
2	4.7uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C4
4	1uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C2, C6, C9, C10
1	10uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C3
1	47uF	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	C5
1	1uF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C7
2	100nF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C8, C15
1	1nF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C11
3	10k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R2, R9

Show 5 more

Qty	Part	Footprint	Refs
2	100k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R3, R10
1	360	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R4
1	470	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R5
1	MF11-103	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R6
2	1M	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R13, R14

SolarMeshtasticNodeMini design files

The KiCad project lives in the h0lad/SolarMeshtasticNodeMini repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/SolarMeshtasticNodeMini.kicad_pcb
Schematicpcb/SolarMeshtasticNodeMini.kicad_sch

SolarMeshtasticNodeMini: common questions

How big is the SolarMeshtasticNodeMini PCB?

The SolarMeshtasticNodeMini measures 33 × 47 mm, has 4 copper layers and is 1.600198 mm thick.

How many components are on the SolarMeshtasticNodeMini?

35 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the SolarMeshtasticNodeMini design files?

From the h0lad/SolarMeshtasticNodeMini repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the SolarMeshtasticNodeMini design in my own project?

The repository has no license, so all rights stay with h0lad. Use it as a reference, and ask the author before reusing the design.

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