High voltage supply and smart meter: what they have in common

1. Step 1. High voltage supply — is part of — Geiger counter. The tube’s power supply.
2. Step 2. Geiger counter — has part — Loudspeaker. Clicks for every particle.
3. Step 3. Loudspeaker — has part — Permanent magnet. A permanent magnet.
4. Step 4. Permanent magnet — is part of — Electricity meter. A braking magnet.
5. Step 5. Electricity meter — evolved into — Smart meter. A digital meter.

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