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Call for Paper Volume 7 Issue 2 February 2026 Submit your research before last 3 days of to publish your research paper in the issue of February.
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A Pen with Refill Indicator

Author(s) Mrs. Asna Mohammed Farman Shaikh, Mr Mehboob Nasruddin Shaikh
Country India
Abstract We can not predict when a pen ink is about to over in opaque body stylish pens. To solve this a small open circuit is set up on refill.Two conductive s are attached at lower level of refill, ink is filled with graphite powder on top of it.Since density of graphite powder is less then ink. It will float on it. A small LED bulb with button cells, attached on top of it. When in level is low, graphite comes in contact with two condutive pins and circuit is closed to lit LED.Hence indicating Low level of ink in a pen.
Keywords Low ink , refill indicator, LED, button Cell, conductive pins and wires
Field Computer > Electronics
Published In Volume 7, Issue 2, February 2026
Published On 2026-02-14
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