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@ -21,11 +21,20 @@ To build a Full body set of trackers:
**NOTE:** *Some extra components were purchased in case of defects* **NOTE:** *Some extra components were purchased in case of defects*
:warning: Huge caveats about the purchase list below :warning:
1. Buy more parts than I did, ( especially BMI's ) because
some of these have a horrible failure rate. 15+
2. Maybe throw in an extra D1 ( 11 total ) because these can fail too.
3. Batter chargers tend to be fine but can be prone to getting burned so be careful when soldering.
## Main parts from AliExpress: ## Main parts from AliExpress:
* `10` D1 Mini for `20.53$` * `10` D1 Mini for `20.53$`
* `13` BMI 160 for `18.99$` * `13` BMI 160 for `18.99$`
* `10` 18650 Battery chargers for `6.81$` * `10` 18650 Battery **chargers** for `6.81$`
* Keep in mind that this will also work for regular LIPO batteries * Keep in mind that this will also work for regular LIPO batteries
* *See battery section for explanation* * *See battery section for explanation*
@ -42,23 +51,43 @@ For reference I bought:
* `1` ( 10 piece ) EHAO 804040 3.7V 18mAh for `32.77$` * `1` ( 10 piece ) EHAO 804040 3.7V 18mAh for `32.77$`
While these do work the shipping time is pretty awful compared to everything else. While these do work, shipping time is pretty awful compared to everything else.
To deal with this problem you can swap those out for some Amazon basics 18650's Looking at the order of a few months for some vendors.
and cases instead which cuts the shipping time way down: To deal with this problem we can swap those out for some `18650`'s:
* 12 pack of 18650 `21.85$`
* 10 pack of battery clips `7.99$` * 10 pack of battery clips `7.99$`
* Set of 10 batteries for `33.32$`
* Total with taxes: `32.15$` * Total with taxes: `41.14$`
Total for these is without shipping or taxes. I can attest that `18650batteries.com` is a reputable place to get batteries.
Personally I would bet on buying batteries elsewhere ( if you're in the U.S./Canada ) *SideNote: includes shipping but you're mileage may vary depending on source*
since the cost is usually comparable.
## Total Cost With Shipping and Taxes ## Total Initial Cost With Shipping and Taxes
If you buy the 804040 batteries: `93.60$` If you buy the 804040 batteries: `93.60$`
With the 18650's from amazon: `92.98$` With the 18650's: `101.97$`
## Assembly
### Assumptions
That the parts list above is being used however the points below
are kept somewhat general.
### Equipment
Important to note that if you don't have soldering equipment you'll need
to get some.
Cheap kits can be found for under 50$ but make sure you have plenty of solder.
1. 18650's are heavy so if possible
For this reason it's not a bad idea to get some battery clips and mount
everything to that to keep things compact. When the weight of a tracker
is imbalanced then it's much harder to mount as it tends to "swing" more.
2. Heat shrink of varying sizes to clean up splices is basically required.
3. \*Flux if you want however this is really not required at all.