Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-07-21
1990-06-05
Orsino, Josesph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340693, 733365, 324696, 200 6105, G08B 2100
Patent
active
049317750
ABSTRACT:
An alarm device for monitoring the watering needs of a plant which comprises a stick surmounted by a cylindrical box containing the electrical elements. The stick is buried in the soil of a pot holding a plant. The alarm device is powered by a battery easily installable and consists of a conductive probe detector located at the buried end of the stick. It also comprises a first integrated circuit which is switched by a backwards connected amplifier acting as a very high impedance switch which minimizes power consumption. The circuit emits a series of pulses when a threshold resistance level is reached. These pulses trigger a melody integrated circuit which produces a pleasant singing melody destined to draw the attention of the plant grower to the watering needs of a plant. The tune is repeatedly reproduced until the soil resistance detected by the probe detector has exceeded a threshold resistance level.
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"Water Warbler", Electronics Australia vol. 37 No. 9 pp. 42-43; D. Edwards.
Charmasson Henry J. A.
Jackson Jill
Orsino Josesph A.
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