Digital Playground Body Heat Free — Fresh

4.1 Energy Balance Simulation
Using a thermal finite-element model (COMSOL) of a TEG-equipped seesaw handle:

4.2 Seasonal & Environmental Factors

4.3 Cost Estimate (per 50 m² playground)
| Component | Cost (USD) |
|-----------|------------|
| 100 TEGs (40×40 mm) | $300 |
| Heat sinks + clamps | $150 |
| Boost converters + supercaps | $80 |
| LED + microcontroller | $50 |
| Fabrication (handles, seats) | $200 |
| Total | $780 | digital playground body heat free

Comparable to solar+ battery system ($1000+), with no battery replacement costs.

You won't find this tech at a typical city park yet, but early adopters are paving the way: Inclusive content and settings