Let's start with the simplest board, the Plug PCB. This board serves as the interface for the Universal Mount, allowing you to easily connect and disconnect extensions to your TNY-360.
This board doesn't have SMD components, so you can solder it using traditional soldering iron, which is much easier and more forgiving.
For this board, you'll need:
| Component | Description | Quantity | Reference |
|---|---|---|---|
| 4-pin JST-PH Connector | Connector towards the power board for I2C bus | 1 | CN1 |
| 4-pin JST-PH Connector | Connector towards the main board for I2C bus | 1 | CN2 |
| 2-pin JST-PH Connector | Connector towards the power board for 12.6V | 1 | CN3 |
| 2-pin JST-PH Connector | Connector towards the main board for 5V | 1 | CN4 |
| DC-DC 5V Step-Down Module | Step-down converter for 5V output to the main board | 1 | - |
While placing the components, make sure that:
Start by soldering the step-down module to the PCB. This will be the largest component and will require the most heat, so it's best to solder it first.
If you have some, place a small amount of solder flux on the pads before placing the module. This will help the solder flow better and create a stronger joint.
Use a soldering iron with a fine tip, and apply heat to the pads while feeding solder to create a solid joint. Make sure the module is flush with the PCB and that there are no cold joints or bridges between the pads.
After soldering the step-down module, you can move on to soldering the JST-PH connectors. These connectors are smaller and require less heat, so they should be easier to solder.
Place all the connectors on the PCB, and flip the board over to solder the pins. This way, you can ensure that the connectors are properly aligned and flush with the PCB.
Again, if you have some solder flux, apply it to the pins before soldering to improve the quality of the joints. Use a fine-tipped soldering iron and be careful not to apply too much heat, as the connectors can be sensitive to overheating.
For each connector, solder one pin first to hold it in place, then check the alignment and adjust if necessary before soldering the remaining pins.
After soldering all the components, inspect the PCB carefully to ensure that all joints are solid and there are no solder bridges or cold joints. Use a magnifying glass if necessary to check for any issues.
If you have a multimeter, you can also check for continuity between the pins of the connectors and the corresponding pads on the PCB to ensure that everything is properly connected.
All good? Great! Let's move on to the next board, then!