My Solution for the challenges

A project log for Trinket Pedometer

Connect a Trinket PRO to a pedometer help burn off the extra pounds.

pcdocmspcdocms 09/05/2017 at 03:100 Comments

Note TP = " Trinket Pedometer "

This biggest challenges for the project are :

1) How do I keep the size small and at the same time keep it functional as a regular pedometer ?  ( The last thing I want is a huge box hanging off my belt loop

I will use an old dead  WiFI adapter  housing and connector for the Trinket's housing
and data collection

2) How do I power/recharge the dang thing ?

Using the old USB-A male connector, I will use this  for both data collection and power -  When I plug

the device in the usb dock pictured in future future diagrams included with this blog, it will charge the batteries every time   and download data from the TP simultaneously . A VB program will

collect and store data from current walks from memory stored in the TP

I want to use small batteries but at the same time have enough charge for a 5 mile walk

at 3 to 5 mi/hr

I have decided to use a Li-ion  cordless phone battery to power the device.  I figure if the

talk time on my cordless handset is about 2 hours, this will more than enough walk time for

the TP 

3) How do I upload data from the device ? Do I want wired or wireless data transfer  ?

See the above regarding the USB connector scavenged from the busted WiFI


4) How do keep it inexpensive to build  ( if it is going to cost more than the a FitBit,

what's is the point, right ?? ).  I want to use stuff I  can find around the house.

These are my expenses so far :

Digital Pedometer - $1

Cordless phone battery - Donation - $0

Busted WiFi Adapter - Donation -$0

Adafruit -Trinket  Pro  -$10

Construction time - Donated - 0$

Total cost - $11

Cheapest Fitbit at Walmart - $60

(I think I'm good with the price )

( more to come in the next blog )