Energy Lab

🔬 Energy Harvesting Simulator

Pick an environmental energy source, drag the sliders, and the panel computes harvested power, net usable power, cold-start time and drivable devices in real time, with electrical matching against LS6821 input requirements.

① Select energy source

Under indoor LED / fluorescent light, OPV, perovskite and a-Si panels differ markedly in power density.

PV material

Ambient illuminance lux

400 lux

Harvest area cm² (0.5–500)

Direct outdoor sunlight is ~100,000 lux. These are engineering estimates for thin-film modules outdoors.

Light intensity sun multiples (1=noon)

0.6 ☀

Harvest area cm² (0.5–200)

Thermoelectric (TEG): Seebeck effect from pipes, body heat, equipment dissipation. Engineering estimates.

ΔT °C (2–80)

30 °C

Module area cm² (1–500)

Piezoelectric harvesting for motors, pipes, footsteps. Engineering estimates.

Frequency Hz (5–200)

50 Hz

Acceleration g (0.1–2)

0.5 g

RF harvesting from Wi-Fi / Bluetooth / RFID. Closer distance gives higher power. Engineering estimates.

TX power dBm (0–30)

20 dBm

Distance m (0.1–5)

1.0 m

② Storage (Lithium supercapacitor)

Estimated harvest power (after chip conversion)

—µW

Net usable power — µW (after leakage 16.5µW = 5µA × 3.3V, upper bound of 2–5µA table)

Cold-start time — (startup cap 4.7mF charges to cold-start threshold 2.0V; internal CINT POR 1.8V, per LS6821_DS_V1.6)

Param V1.0 ｜ Source LS6821_DS_V1.6 ｜ Review YEEMION硬件组｜ 2026-07-15

Storage dynamics (Li-supercap charge / discharge)

Waiting for energy…

Current voltage —

Real full charge —

Drivable loads (by net power)

RTC (continuous timing)≥0.2µW

Low-freq sensing (1/h)≥0.6µW

Temp/RH + BLE beacon (1/min)≥2µW

BLE sensor node (1/s)≥61µW

Active sensing / high-freq comm≥1mW

Continuous multi-device≥10mW

—

Electrical matching (LS6821 input requirements)

① Open-circuit voltage meets cold-start

② Input current meets requirement

③ Source impedance matches MPPT

④ Peak load supported by storage

Energy harvesting IC

LS6821 · ultra-low cold-start

View →

⚡

OPV panel

indoor light harvest

View →

🟢

Lithium supercap

100F buffer storage

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📧 Contact engineer

* Indoor-light density based on OPV / perovskite (ILS-30) / a-Si datasheets, linearly interpolated by lux; sun, thermal, vibration and RF are engineering estimates and vary with device and conditions.
* Energy chain: source → chip conversion (80%) → minus supercap leakage (5µA × 3.3V = 16.5µW) = net load power; both device lighting and storage charging use the same net power, so "can drive yet cannot store" cannot happen.
* Electrical matching is estimated against LS6821 input conditions (open-circuit voltage / input current / source impedance / peak load); thermal, vibration and RF often need a boost or dedicated front-end because voltage/impedance do not meet spec, so the chip is not recommended by power alone.
* Storage model: E = ½C(V²−V_min²), charged by net power; each transmission deducts only ~3% of storage (exaggerated for visibility; a real BLE packet uses far less). Cold-start voltage etc. follow the LS6821 datasheet; values here pending product-engineer confirmation.

Principles behind the lab

Every interactive result maps to real device parameters in YEEMION's product system

Harvest

OPV / perovskite absorb indoor light, TEG uses temperature difference, piezo recovers vibration, RF front-end captures ambient waves — turning environmental energy into tiny current.

Manage

The LS6821 harvesting IC performs cold-start, MPPT and boost, feeding µW-level input steadily into storage.

Store

The lithium supercapacitor leaks only 2–5µA, tolerating µA charging and transient high-current discharge for wireless pulses.

Load

When storage reaches threshold, the sensor samples and transmits via BLE / 2.4G / LoRa, then enters the next harvest cycle.

🔬 Energy Harvesting Simulator

Energy harvesting IC

OPV panel

Lithium supercap

Principles behind the lab

Harvest

Manage

Store

Load

Want to validate a design with your own conditions?