|Arduino sketch (.ino) file and libraries for the WiFi Water Tank Level Meter|
A ZIP package download which includes the Arduino sketch and libraries needed for the Solar Powered WiFi Water Tank Level Meter and Weather Station.
|GY-68 Barometric Pressure/Altitude/Temperature I²C Sensor breakout board|
A tiny breakout board with a BMP180 barometric pressure/altitude/temperature sensor plus a regulator and level shifter. Connects easily to an Arduino, Micromite, etc using the I²C bus via a standard 4-pin header. For more information, see the GY-68 and BMP180 data sheets.
|DHT22/AM2302 Temperature and Humidity sensor module|
A DHT22/AM2302 digital temperature and humidity sensor module, as described in the February 2017 "El Cheapo Electronic Modules" article.
If you're using this to build the Altimeter/Weather Station from December 2017, you will need a 1k resistor wired between pins 1 and 2 and a 100nF capacitor wired in series with pin 4; see errata.
|Small 2A boost step-up regulator module (MT3608)|
A 36x17mm module which uses the MT3608 boost regulator IC. Input is 2-24V, output is 5-28V at up to 2A continuous.
Efficiency up to 93%, switching frequency 1.2MHz. Output voltage is adjusted using a multi-turn trimpot. The input and output DC connections are made via pads in the corner of the PCB.
|WeMos D1 R2 Arduino-compatible ARM processor board with WiFi|
A WeMos D1 R2 board with ESP8266 chipset that incorporates WiFi. Can be programmed using the Arduino IDE but you have to install additional files.
See the article on ESP8266 and ThingSpeak.com in the September 2017 issue for more details.
This version has a connector for an external antenna (it's a WeMos board clone by Robotdyn).
|IPP80P03P4L04 high-current P-channel Mosfet|
A high-current P-channel Mosfet with very low on-resistance in a standard TO-220 package. Its critical specifications are:
Maximum drain-source voltage: 30V
Maximum gate-source voltage: +5V, -16V
Maximum continuous drain current: 80A
Maximum pulsed drain current: 320A
Maximum dissipation: 137W
Gate threshold voltage: 1-2V
Input capacitance: 8.7nF
Output capacitance: 2.4nF
Reverse transfer capacitance: 65pF
|5dBi 2.4GHz WiFi antenna with U.FL/IPX adaptor cable|
A 175mm-tall 2.4GHz black WiFi antenna with right-angle bending hinge, SMA plug and 5dBi gain (vertical polarisation).
Supplied with a matching chassis-mount SMA socket and attached 20cm cable terminated in a U.FL/IPX connector, as used on many WiFi devices.
|2dBi omnidirectional 2.4GHz WiFi antenna with U.FL/IPX adaptor cable|
A 28mm-tall 2.4GHz black WiFi antenna with SMA plug and 2dBi gain (omnidirectional).
Supplied with a matching chassis-mount SMA socket and attached 10cm cable terminated in a U.FL/IPX connector, as used on many WiFi devices.
|5m water level sensor (4-20mA) with 5-6m lead|
A pressure-based water level sensor which is placed at the bottom of the water tank. Supply 24V (positive to red wire) and the current draw will indicate the water level.
As used in the WiFi Water Tank Level Meter project.
|Elecrow 1A/500mA Li-ion/LiPo charger board with USB power pass-through|
A 46 x 32mm module with a micro-USB type B input port and a full-size USB type A output port, plus connections for a solar panel and Li-ion/LiPo cell.
For more details, see the article in the August 2017 issue titled "El Cheapo Modules: Li-ion & LiPo Chargers" (starting on page 44).
PLEASE NOTE: the red/black colour coding on the cables supplied MAY NOT match the polarity of the connectors on this module.
Incorporates an onboard step-up circuit to provide a regulated 5V output (at up to 500mA) from the cell, plus a 1A charger and automatic input-to-output pass-through. Supplied with three 2-wire JST 2.0 cables to connect the cell and output and optionally, a solar panel for charging. Also incorporates battery level indicator LEDs.
Note that the input and output USB socket data lines are not connected.
|5V 0.8W 160mA solar panel|
Panel type: Monocrystalline silicon
Dimensions: 99 x 69mm
Open circuit voltage: ~6V
Full load voltage: ~5V
Connections: two solder pads on the underside of the panel
|WiFi Water Tank Level Meter shield PCB with stackable headers |
PCB for the Solar Powered WiFi Water Tank Level Meter and Weather Station shield.
Double-sided PCB with plated through holes, solder mask and silkscreen overlay. Included with the PCB are two 6-pin and two 8-pin stackable headers.
68.5 x 53.5mm.
|WiFi Water Tank Level Meter shield PCB pattern (PDF download) |
PDF with the PCB design of the shield for the WiFi Water Tank Level Meter.
The PCB design is double-sided and both layers are in the same PDF.