To wire up the battery power supply for the circuit, tin the long leads of your on/off switch with solder.
You may also wish to extend the switch leads even longer with pieces of wire.
Also solder the JST cable's black wire to the battery pack's black wire.
Attach the Flora accelerometer according to the circuit diagram. Notice that all four pins necessary for this i2c sensor are in a row, making wiring very convenient!
Affix the Flora board and accelerometer to the battery pack with Velcro tape. Likewise between the battery pack and plastic enclosure.
These simple wireless receiver/remote pairs are great for adding a few wireless inputs to your project, but they operate at 5V, which doesn't match Flora's 3V i/o. So build a simple voltage divider with two 4.7K ohm resistors!
To attach to Flora, twist the resistor leads together and solder to a digital input pin. Repeat with more pairs of resistors for each button on your remote or as many as you'd like to use.
One resistor in each pair will be soldered to ground, and the other will connect to the RF module's output.
Female jumper wires can come in handy for attaching to the RF module's header pins. The pin marked +5V gets connected to VBATT on Flora, and GND goes go GND.
Plug an extender onto the input side of a strand of weather-resistant LED pixels.
Run the connector cable through a small hole bored in the plastic weather-resistant enclosure.
These tactile on/off switches are perfect for toggling power on our backpack, but the switch isn't inherently waterproof. Using a bit of plastic to prevent the button from being clogged, wrap the switch in Sugru and let it cure for 24 hours. Wear gloves to prevent fingerprint marks.