Techno Optimists - find real problems, help solve them

Techno Optimists

Sheet 04 - Edition 2026.3

Live challenges: 12

People
Ideas
Places
Brighter
Tomorrows

Legendwhat the marks mean

Impact (contour rings)

1 ring = local
2 rings = neighbourhood
3 rings = town
4 rings = region
5 rings = critical

Challenge stages (7 steps)

Spot - notice and share
Understand - explore and define
Ideas - propose solutions
Build - develop and make
Test - trial and evaluate
Learn - reflect and share
Improve - scale and sustain

Actions

I have this problem
I have an idea
I can help
I will test this
Follow progress

No.Grid ref.ChallengeImpactStage

01UT 3621 4446Chiang Mai, Thailand

UT 3621 4446Chiang Mai, Thailand

Problem

This farmer loses a third of his milk to the afternoon heat

No grid power at the collection point. Milk sits at 34C for four hours before the truck comes.

Ideas

02UW 4757 0190Palermo, Italy

UW 4757 0190Palermo, Italy

One wall of a room radiating stored heat

Problem

My bedroom runs 8C hotter than the rest of the apartment

Same building, same floor, same size. Thermal camera shows the wall glowing after sunset.

Ideas

03VX 6001 0533Cross River, Nigeria

VX 6001 0533Cross River, Nigeria

Rain falling into standing water with mosquitoes above it

Problem

This village gets a strange mosquito surge for six weeks every rainy season

It starts nine days after the first heavy rain, every year, and stops as abruptly as it starts.

Understand

04XH 9565 0810

XH 9565 0810

A drone carrying a compute unit over a city

Idea

Could compute move around a city on autonomous drones?

GPUs are idle at night in one district and saturated in another. What if the hardware flew to the demand?

Understand

05BT 5778 7583Lagos, Nigeria

BT 5778 7583Lagos, Nigeria

Power lines at dusk with most windows dark

Problem

The grid here drops for two hours every evening and nobody knows why

Same window, 19:00 to 21:00, five days a week. Not the weekend. Utility says nothing is wrong.

Spot

06AL 2128 0363Kochi, India

AL 2128 0363Kochi, India

A fishing boat on open water under the sun

Problem

Fishermen here lose part of every catch before they reach shore

Six hours back to port with no ice. The last of the catch is unsellable by the time they dock.

Test

07YZ 2824 6164Krakow, Poland

YZ 2824 6164Krakow, Poland

A timer on a drip irrigation line in a field

Build

A drip irrigation timer that survives being left in a field

Every commercial one dies within a season. Cheap plastic, dead battery, corroded contacts.

Build

08XC 1190 2579Tromso, Norway

XC 1190 2579Tromso, Norway

Experiment

Testing whether a salt-water battery can run a fridge overnight

Terrible energy density, wonderful price, completely non-flammable. Good trade for a stationary use.

Ideas

09YX 0066 3837Belem, Brazil

YX 0066 3837Belem, Brazil

Idea

Sorting plastic by the sound it makes when you tap it

Different polymers ring differently. A $3 microphone might do what a $12,000 spectrometer does.

Ideas

10BJ 2906 6750Shenzhen, China

BJ 2906 6750Shenzhen, China

A phone reading a test strip against a colour card

Build

A water test strip reader that works on any phone camera

The strips are cheap. Reading them by eye under different light is where the accuracy dies.

Test

11WE 6509 0611Osaka, Japan

WE 6509 0611Osaka, Japan

Experiment

Can you build a useful thermal camera for under $50?

The sensors are cheap now. Everything else about the product is not. Testing whether the gap is real.

Learn

12JF 4239 4271Cross River, Nigeria

JF 4239 4271Cross River, Nigeria

Problem

The village well pump burns out every dry season

It runs dry, overheats, and dies. A new one costs four months of income.

Understand

Techno OptimistsStronger communities through brighter ideasSheet 04 - 2026.3

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