This handy component will be used to regulate solar power from the solar panel and safely charge the lithium battery. The lithium battery will be powering the CPX. The reason the capacitor is so large is that it is needed to stabilize the solar panel as the current can be quite high. For extensive information on the Solar Lithium Charger check out the guide.
- First let's solder on the red and black wired JST connector to the
"LOAD"side of the charger.
- Next we'll solder on the capacitor. Make sure the longer leg is put through the positive hole.
- The JST connector will eventually be plugged into the CPX to power it.
- We need the
4.7Kresistor to be between the
data (yellow)lines. We solder the resistor on accordingly.
- Next wrap the blue line around the
GNDon the CPX. Specifically the
GNDnext to the micro usb port.
- Wrap the red line around the
3.3Vspecifically the one on the other side of the
GNDwe just wired.
- Wrap the yellow line on
- Solder the wires in place and cut off the excess resistor / wire.
- Find further information on the DS18B20 temperature sensor here.
- Cut two 12" of pieces of 22 - 28 gauge stranded wire.
- Remove about 0.5" of wire wrap on each end.
- Wrap the end of one wire to
A1on the CPX and the other to
- Solder the wires in place.
- Wrap the other sides to the two nails.
- Solder them to the nails.
- Cut two 1" pieces of 3/8" heat shrink
- Slide them over the the nail until the nail tops are in the center of the heat shrink.
- Use a lighter, match or other heat source like the hot body of a soldering iron (not the tip) to activate the heat shrink.
In order to keep the power line from the solar panel, as well as the enclosure waterproof, we will have to place a cable gland though the DC lines before we solder them together. We must do this because the gland does not fit over the thick part of the jack.
- Take one of the cable glands, unscrew the smaller piece off and keep it close by (we'll need it later). Slide the gland over the male DC jack end.
- Cut a 3" piece of 1/4" heat shrink and slide it over the female DC jack end.
- Next cut two 1.5" pieces of 3/32" heat shrink and slide each on over the
- Solder the male and female DC jack ends together (black to black and red to red).
- Slide the smaller heat shrink over the ground and power. Activate heat shrink with a heat source.
- Slide the larger heat shrink over the wires and smaller heat shrink. Activate heat shrink with a heat source.
Now that we have things soldered up, we'll have to mount it all to the enclosure!