The Solar Notebook Project Family from Solar Schoolhouse are all designed to charge a cell phone (or powerbank) with one or more solar modules. The differences between the various models are shown in this document. All of the Solar Notebooks use one or more 8v*400mA (3.2watt) solar modules as a power source, combined with a USB car charger to convert to a 5Vdc USB compatible output. Soldering is optional for most models, though it’s always great to learn to use a new tools, when possible.
[click on image above to view the Solar Notebook Model comparison doc [pdf]]
NB42E123 – This configurations includes 1 Power Bank, 1 USB LED Light Bulb, 1 USB LED Light Stick, 2-port USB Car Charger, pencil pouch, 2- 8v*400mA Solar Modules, pre-cut coroplast (repurposed campaign signs). “E123” is an emergency preparedness feature, as this kit includes powerbank AND 2 USB LED lights. Duct tape is not included.
Simplified instructions for #NB42E123 using Tools found at Home. (v20200731) Video below illustrates this assembly technique using alternate tools found at home. For example, using scissors to strip wire insulation instead of a wire stripper/cutter.
#NB4 & NB42
NB4 & NB42  Instructions for building version NB4 and NB42 of the Solar Notebook Family. These configurations use one or two 8v*400mA solar modules. One can choose paper cardboard or plastic cardboard (aka “coroplast”, repurposed campaign signs) as the foundation. NB4 uses 1 solar module, while NB42 uses 2 modules in parallel to increase charging power. Solder and solder-free options are included.
NB4WG1  Instructions for building version NB4WG1 Solar Notebook + Whirlygig This configurations includes 1 motor, 1 2″dia yellow wheel, velcro, pipe cleaners, energy beads, wire, & alligator clips for the whirlygig. The autosocket is removed, so that one must solder wires directly to the USB car charger. Plus the ingredients of the Solar Notebook NB4. The Whirlygig Feature adds a KINETIC element to your project, providing an excellent teaching tool for sharing @ solar power with others.
Teacher tips for Making a Solar Cell Phone Charging Station as part of Intro to Engineering High School course. [shared by Daniel Karbousky of Sonoma Academy, Fall 2014]