[PCB] Arduino Pro mini + RFM95W + 18650 LiPo with freq uA deep sleep and solar chargeable

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Description

Mario Zwiers designed a TTN Arduino LowPower Solar Node. Cheers!

Others are saying:

Love the longboard shape sitting on the back of the battery! Great work…

Features

  • Arduino Pro mini 3.3V without LED, without regulator (5uA)
  • RF95W (1.5uA)
  • MCP1700-330 LDO (1.6uA, 250mAh max, 2.3-6V input)
  • NCR18650B (3200mA LiPo 4.2V charge, 3.0V cut)
  • TP4056 charger with protection for LiPo (4.2-7V input)
  • Diode for solar module (TP4056 works very well with 5V / 6V solar cells)
  • Resistors, capacitor for measuring the battery voltage at A0 and 1.1V reference
  • Plug’n Play slot for BME280 (temperature, humidity, air pressure over I2C)
  • SMA antenna connector or wire e.g. helical

Links


3 Likes

There have been some updates to this PCB design recently. Enjoy:

Eigentlich eine ziemlich coole Sache, die Frage ist für uns, ob mit dem LoRa stack noch genug Speicher für andere Sachen, vor allem HX711! da ist. Müsste ich mal testen! Audio ist ja eh nicht mit dem Pro Mini.