v6.0 – PCB-20180714

Release date: 14/07/2018

Version: v6.0

Dimensions: 6.2×8.7cm

Type: FR4, 2 layers, 1.2mm, HASL

Thank you paciotti!

Download link:

Assembly List

 

All parts are available as a kit in our shop with the SMD parts presoldered.

 

Label Part Type Properties
BME BME280 Optional component, output signal Digital Signal; power supply 3.3-5.5V DC
K2 – Heating Relay OMRON PCB Power Relay – G5LE contact rating 125VAC @ 10 AMP / 30VDC @ 8 AMP; switching circuit SPDT; package THT; variant variant 2; voltage 12V; part # G5LE-1
K1 – Hot Water Relay OMRON PCB Power Relay – G5LE contact rating 125VAC @ 10 AMP / 30VDC @ 8 AMP; switching circuit SPDT; package THT; variant variant 2; voltage 12V; part # G5LE-1
H Humidity contact Unprotected I/O. Do not connect directly to a relay!
U1 Power supply HLK-PM01
D1 Rectifier Diode type Rectifier; package Melf DO-213 AB [SMD]; part # 1N4001
D2 Rectifier Diode type Rectifier; package Melf DO-213 AB [SMD]; part # 1N4001
Q1 PNP-Transistor type PNP; package SOT-23 [SMD]; part # 2N2222
Q2 PNP-Transistor type PNP; package SOT-23 [SMD]; part # 2N2222
R1 1.2kΩ Resistor tolerance ±5%; package 1206 [SMD]; resistance 1.2kΩ
R2 1.2kΩ Resistor tolerance ±5%; package 1206 [SMD]; resistance 1.2kΩ
J1 RaspberryPi Zero or Zero W Any version

v6.0 - Supported features

  • - Thank you paciotti!
  • - Improved design with noise protection from high voltage spikes
  • - Snaps on RaspberryPi Zero/3/2
  • - Supports both 3.3V and 5V BME sensors.
  • - Dual relay can control 2 independent contacts, like heating thermostat, AC, fan or hot water
  • - Relays offer both N.C. and N.O. contacts to choose (N.O. contacts used by default)
  • - Humidity unpopulated contact labelled 'H' provide unprotected LOW/HIGH signal @ 3.3V directly from RaspberryPi
  • - 4x2.5mm holes for securing PCB and RaspberryPi on the case
  • - Additional CPU ventilation holes

Known issues

  • - Camera connector holder (the part that moves) needs to be removed to allow soldering close to the power supply.
  • - Prefer connecting the sensor with wires and place it 4-5cm further to avoid thermal interference from CPU if you plan to enclose this PCB

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