Demotech, design for self reliance

Here you can find information about Demotech publications and of publications of others that are interesting to our approach.

This work is licensed under a Creative Commons Attribution-Share Alike 3.0 License.

Please refer to our work and provide us with usefull feedback and comments on our design initiatives.

We cannot be held accountable for injuries incurred during construction or usage of our designs and construction manuals.

...44...

NightReader, study-light with LED's: Technical specifications, suggestions for circuits and parts
< Previous | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Next >

Technical specifications, suggestions for circuits and parts

Technical specifications, suggestions for circuits and electronic parts

Target for the electronic cirquit is cheap and robust and long lasting (>5jrs).
Integration of parts not as a start, but to be considered for future assembly.
Charging during day time (not direct sunlight) whitch should deliver a capacity for 4 hours use at night.

2 LED's, white light, small capacity (+/- 5mA?)

1 NC-cel or better quality 1,5 volts, small capacity

Switch operated by laying the NightReader on a surface, puting down = off, lifting up = on.

DC/DC convertor to raise voltage from voltage NC-cell to voltage needed for best performance LED's (possibly dimmed, not full capacity). Possible brand Newport,see www. farnell.com

Solar cell, voltage sufficient for loading NC-cell. Dropping the device may nog result in cracking a solar cell. A flexible type, easely attached to the mirroring cap, is preferred.

A diode(?) to prevent leaking back of current through the solar cell.

Please suggest any other part usefull in this context. Write your contribution on the forumpage, belonging to this record.

NightReader, study-light with LED's: Technical specifications, suggestions for circuits and parts
< Previous | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Next >