Path I · seven stops

From the sun to the wheel

At each stop, the entries that tell it. Skip ahead, come back, branch off.

1. 1

   The sun, and what moves in a wire

   story

   Electricity before Franklin

   Before it was something you measure, electricity was a parlour curiosity for two thousand years.

   1.1story

   The Leyden jar

   If electricity is a fluid, you ought to be able to bottle it.

   1.1story

   Franklin’s fluid

   A multimeter in series shows a number with a sign, and the sign depends on which lead you put on which side.

   1.1story

   Galvani’s frog

   The pack of a cordless drill shows 3.7 V cells.

   1.1bench

   Two nails in a glass of water

   We think water conducts.

   1.1bench

   The pencil lead and the lighter

   We think heat gets in the way of everything that conducts: the hot contact resists more.

   1.1bench

   The battery in the freezer

   We think the cold drains the battery: the flashlight dies in January and comes back to life in the house.

   1.1question

   Why does a contact get hot?

   The bike, after a climb: the pack cable is cool, but the XT60 that joins it to the controller is warm, its nylon browned on one side.

   1.1question

   Why does a battery weaken in the cold?

   January in New Brunswick, -20 °C.

   1.1the crossroads

   1.1 Charge and its movement

   The lesson.

   1.1

2. 2

   The panel

   To come. 6.4

3. 3

   The charger

   To come. 6.3 · 7.3

4. 4

   The pack

   object

   The EGO pack opened

   Ten groups, the nickel strips, the BMS.

   6.2 · 1.1the crossroads

   6.2 The pack

   The lesson.

   6.1 · 6.2

5. 5

   The controller

   To come. 6.6 · 3.3

6. 6

   The motor

   To come. 6.5 · 1.8

7. 7

   The wheel

   To come. 4.12 · 6.8

Where I stand on this path →