ArmaLamp Aims to Brighten Up Those Dark Post-Apocalypse Nights

Designed to harvest sunlight during the day and emit a bright white light at night, this simple circular circuit is a disaster must-have.

A supercapacitor is charged via Schottky diode,

This current also disables [the] step up booster. In night or if it lose[s] power booster is automatically started and very effectively discharge[s the] supercapacitor and convert[s] almost all stored energy because [it] can work until 0.3V.

Circuit as "extremely simple" for reasons of reliability,

while the current circuit design could be further optimized to reduce its footprint.

On the board are six plastic photodiodes, which act as the solar energy harvester,

a 10F supercapacitor, a power-management chip, and a single LED

FEATURES

- 6x BPW34 photodiodes aka solar cell

(plastic diodes, more resistant to damage against glass solar cell)

-Up to 20F supercapacitor

(You can use bigger capacity but 20F is optimal for charge in one sunny day)

-4 hours operation in night depends on LED intensity

-Auto night on

-Step up converter effective use all stored energy, discharge scap until 0.3V !!!!!!

-Output is activated in night

-Extremely simple

-Adjustable output voltage and current

-Supercapacitor have much more life compared to Li-ion battery about 500 000 to 1mil cycles

you can reach this after 1370years

-fit in plastic sample jar with 2x 1F capacitors

COMPONENTS LIST BOM

• 6x BPV34
• 1x Resistor 0603 1M
• 1x Resistor 0603 10k
• 1x Resistor 0603 976k
• 1x Resistor 0603 562k
• 1x Capacitor 0603 10uF
• 2x Capacitor 1F 3V
• Schottky diode MBRA140
• LED 3528 with favorite color
• MCP1640 step up power chip
• 4.7uH inductor

Open Source Hardware Association certified

OSHWA UID SK000003 SLOVAKIA

Some more pictures and PCB details, one picture better than 1000 words

Night Operation

Capacitors pair detail