HardLabs

SolarMeshtasticNode

h0lad·SolarMeshtasticNode·pcb/MeshtasticNode_BQ25185.kicad_pcb

SolarMeshtasticNode PCB layout, top view — open source board by h0lad
Simulate this board

About the SolarMeshtasticNode PCB

SolarMeshtasticNode is an open source PCB design by h0lad, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 66.9 × 87 mm, with 46 components from 29 distinct parts.

Other key parts include the BQ25185, HT-CT62, TPS22917DBV, APX803L05-32SA-7 and HE9073A30MR. By type, the board carries 14 capacitors, 14 resistors, 6 ICs, 6 connectors, 3 diodes and 2 switches.

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

From the project

This is a Meshtastic Solar Node PCB based on the Heltec HT-CT62 and the linear solar charge controller TI BQ25185.

This is a Meshtastic solar node based on the Heltec HT-CT62.pdf) and the (new) linear solar charge controller TI BQ25185.

- Solar Input up to 18V (24V survival) - 3A maximum load - 1A maximum charge current - Pseudo-MPPT (VINDPM) - Power Path (= if the battery is fully charged and there's enough solar power the device is getting powered directly from solar. During sunrise and sunset it can mix the sources.) - Low leakage load switch TI TPS22917DBV to switch off entire 3.0V rail if battery voltage drops too low (charger stays alive) - Two ADC signals for getting VLOAD and VBUS voltage using…

SolarMeshtasticNode, from the project README
From the project README

Main components on the SolarMeshtasticNode

BQ25185HT-CT62TPS22917DBVAPX803L05-32SA-7HE9073A30MRSS26_C5350986

SolarMeshtasticNode bill of materials (BOM)

46 components, 29 distinct parts.

QtyPartRefs
1
BQ25185
U1
1
HT-CT62
U2
1
TPS22917DBV
U3
1
APX803L05-32SA-7
U4
1
HE9073A30MR
U5
1
SS26_C5350986
U10
3
Conn_01x02_Socket
J1, J2, J8
3
Conn_01x04_Socket
J4, J5, J7
1
BH-18650-A1AJ005
MYOUNG(美阳)
BT1
1
SSSS811101
SW1
1
SW_Push
SW4
2
LED
D2, D3
1
SMAJ14A
D4
1
1nF
C1
4
1uF
C2, C6, C12, C13
3
10uF
C3, C9, C10
1
47uF
C5
1
100nF
C7
3
100nF
C8, C14, C15
1
4.7uF
C11
Show 9 more
QtyPartRefs
3
10k
R2, R8, R9
2
100k
R3, R10
1
375
R4
2
1.2k
R5, R7
1
1k
R6
2
1M
R11, R12
1
820k
R13
1
91k
R14
1
470
R17

SolarMeshtasticNode design files

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

SolarMeshtasticNode: common questions

How big is the SolarMeshtasticNode PCB?

The SolarMeshtasticNode measures 66.9 × 87 mm, has 4 copper layers and is 1.6166 mm thick.

How many components are on the SolarMeshtasticNode?

46 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the SolarMeshtasticNode design files?

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

Can I use the SolarMeshtasticNode design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which h0lad chose for the repository.

Similar boards