LoRa remote water level and pump controller (ReWaL): Client PCB – 5
Now we must assemble the Client PCB, and you can get It without additional cost from PCB way.
Client PCB PCBWay
The prototyping and testing
For the client, I use the external module to manage the power supply, so there is no dependency for the people that don’t need to be autonomous with the battery.
Battery and Solar panel circuit
You can find all the components of solar battery recharge on “Emergency power bank homemade“.
Here is a simple video to show how this simple circuit work
The components are simple to find
Solar panel 6v 1w on AliExpress 6v 1w
MicroUSB to DIP adapter on AliExpress
Step UP module on AliExpress
I have tried many types of batteries and these are some of the best:
18650 batteries &nbps;AliExpress 18650 3.7v 3400mah
As usual, I prototype the PCB on Fritzing, and I’m going to mill with my Cyclone PCB Factory.
Bill of Material
|5||Header 2||variant JST-pth-2|
|1||Electrolytic Capacitor||capacitance 0.1µF|
|1||Electrolytic Capacitor||capacitance 10µF|
|6||Generic male header – 2 pins||form ♂ (male); pins 2; pin spacing 0.1in (2.54mm);|
|1||Generic male header – 6 pins||form ♂ (male); pins 6; pin spacing 0.1in (2.54mm);|
|1||Generic male header – 7 pins||form ♂ (male); pins 7; pin spacing 0.1in (2.54mm);|
|3||4.7kΩ Resistor||resistenza 4.7kΩ;|
|3||10kΩ Resistor||resistenza 10kΩ;|
|1||20kΩ Resistor||resistenza 20kΩ;|
|2||Toggle Switch||switching circuit SPDT;|
|1||V_REG_LD1117VXX||voltage 3.3V; chip LD1117V33;|
|1||WeMos D1 Mini|
For assembly, you can refer to the silkscreen of the PCB, and I do It quite verbose.
Then, we must start to assemble the component, the LEDs, switch, display, WeMos D1, and EByte E32.
Some steps of the soldering phase
Here is the pinout and specification of the board.
Pay attention; you can use 5V or 3.3V or all power pins, but you must pay attention to the jumper configuration.
I will publish the box and how to mount it in the next article.
- LoRa remote water tank level and pump controller: intro
- LoRa remote water level and pump controller: server software
- LoRa remote water level and pump controller: client software
- LoRa remote water level and pump controller: server PCB
- LoRa remote water level and pump controller: client PCB
- LoRa remote water level and pump controller: assemble server and 3D printed case
- LoRa remote water level and pump controller: assemble client and 3D printed case