Re: [DIYbio] Plant-based batteries. Aloe Vera circuit

Not to mention that.. I'm pretty sure that good solar panels have a better conversion efficiency than the algae that we're good at growing. And if you're either manufacturing a bioreactor full of moving parts, or a solid-state panel, probably you're better off with the latter. So for bulk 'efficient' energy production I don't think directly plant-derived energy is going to be a winner.

But, for on-site trickle-charging, it's ideal: especially in a forested area where ground-level light for a solar panel is terrible, or falling detritus or growing matter will quickly smother a solar charger. If it's a circuit on a spike that you can just drive into a tree and connect to ground, that's pretty robust.

As for trees-in-series.. I would love to see this idea happen if it were practical, but I have a feeling that the voltages needed to preserve the current over cables would be high enough to arc in outdoor conditions. :)

December 29, 2019 1:54 PM, "Henri Lentonen" <lentonen.henri@gmail.com> wrote:
Harvesting electrons from algae would minimize the growth as the algae normal metabolia operations would be less then. Removing electrons inside algal photosystem would also Most likely destroy the cell itself.
su 29. jouluk. 2019 klo 15.49 Dina Amiri <amiridina@gmail.com> kirjoitti:
Couldn't be it something much more sophisticated like producing electricity from/with Algae? Who would have believed!
On Fri, Dec 27, 2019 at 10:19 PM Jonathan Cline <jncline@gmail.com> wrote:
move over, potato.
Potential application of Aloe Vera-derived plant-based cell in powering wireless device for remote sensor activation
Peng Lean Chong , Ajay Kumar Singh, Swee Leong Kok
Published: December 27, 2019 https://doi.org/10.1371/journal.pone.0227153

Abstract

It is well proven that electrical energy can be harvested from the living plants which can be used as a potential renewable energy source for powering wireless devices in remote areas where replacing or recharging the battery is a difficult task. Therefore, harvesting electrical energy from living plants in remote areas such as in farms or forest areas can be an ideal source of energy as these areas are rich with living plants. The present paper proposes a design of a power management circuit that can harness, store and manage the electrical energy which is harvested from the leaves of Aloe Barbadensis Miller (Aloe Vera) plants to trigger a transmitter load to power a remote sensor. The power management circuit consists of two sections namely; an energy storage system that acts as an energy storage reservoir to store the energy harvested from the plants as well as a voltage regulation system which is used to boost and manage the energy in accordance to a load operation. The experimental results show that the electrical energy harvested from the Aloe Vera under a specific setup condition can produce an output of 3.49 V and 1.1 mA. The harvested energy is being channeled to the power management circuit which can boost the voltage to 10.9 V under no load condition. The harvested energy from the plants boosted by the power management circuit can turn ON the transmitter automatically to activate a temperature and humidity sensor to measure the environmental stimuli periodically with a ton of 1.22 seconds and toff of 0.46 seconds. This proves that this new source of energy combined with a power management circuit can be employed for powering the wireless sensor network for application in the Internet of Things (IoT).

Conclusion

In this paper, a plant base cell (PBC) has been proposed as a new electrical energy source to power low power consumption devices such as a transmitter. The PBC constitutes of a power management system that is connected to Cu-Zn electrode pairs which are embedded into the leaves of the Aloe Vera plants. The proposed power management system can perform a fully autonomous operation to harvest the electrical energy from the Aloe Vera plants to trigger a transmitter load to send signal periodically to the temperature and humidity sensor. This has been confirmed by performing the experiment under a real-life condition. The designed power management circuit, which consists of an energy storage system and a voltage regulation system, can store the minute energy harvested from the Aloe Vera plants and boost them into sufficient energy to power a transmitter load. The transmitter load is proven to be in operation as it sends an intermittent signal to the receiver circuit to activate a remote sensor to measure the surrounding temperature and humidity. Thus, it is experimentally proven in this paper that Aloe Vera plants can be used as an energy source to provide electrical energy and its combination with the proposed power management circuit can act as a plant base cell. The idea of the proposed plant as a battery source can provide significant benefits in IoT application especially in remote areas or dense forest where replacing battery or recharging battery is impossible. The proposed cell can also be employed for precision farming and environmental monitoring where plants are available in abundant.

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