{"schemaVersion":1,"record":{"key":"mechanic/phone-magnetometer--family-04","type":"mechanic","id":"phone-magnetometer--family-04","lang":"en","title":"Field strength as analog input","summary":"Measured field strength can continuously control a parameter. Distance to a particular magnet requires calibration of that magnet’s field.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/phone-magnetometer--family-04/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/phone-magnetometer--family-04.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/phone-magnetometer--family-04.md","aliases":[],"tags":["Phone magnetometer interactions","Mechanics catalog"],"sourceIds":["source-603978442e60360e"],"sources":[{"id":"source-603978442e60360e","title":"Physics Toolbox Magnetometer","url":"https://apps.apple.com/us/app/physics-toolbox-magnetometer/id1003749103?uo=4","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"The relative change in magnetic field sets a continuous parameter after setting the range and neutral state."},{"id":"variants","title":"Variants","body":"### Variants and applications\n\n<a id=\"family-04-variants\"></a>\n\n- Analog proximity. Action: Smoothly change the distance to the magnet; the normalized change in the field sets the parameter. Application: Gas, volume, note pitch, spell intensity. Limitations: Approximation does not always increase the module of the total field; calibrate the working trajectory. Equipment: Phone and external magnet. Preparation: Needs setup. Type: Input method. <a id=\"variant-m025\"></a>\n- Window setting. Action: Find and hold the value between the lower and upper threshold. Application: Set up the radio station, stabilize the reactor, open the lock. Limitations: The window must be wider than the noise and accessible in a comfortable position. Equipment: Telephone and external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m026\"></a>\n- Risk of overload. Action: Increase the value, stopping to a dangerous threshold. Application: Risky charge, overheating, resource extraction on the edge. Limitations: Overload is a game rule; do not require physical saturation of the sensor. Equipment: Phone and external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m027\"></a>\n- Accumulation of impact. Action: Accumulate game resource based on time and magnitude of field change. Application: Energy transfer, charging, melting, slow hacking. Limitations: The game scale is integrated; readings do not measure physical energy transferred. Equipment: Telephone and external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m028\"></a>\n- Repeating the curve. Action: Repeat the target signal strength graph by moving the magnet. Application: Musical phrase, precision manufacturing, training simulator. Limitations: Compare smoothed normalized curves with time tolerance. Equipment: Phone and external magnet. Preparation: Needs setup. Type: Game rule. <a id=\"variant-m029\"></a>\n- Reaction to growth and decline. Action: Separately interpret the increase and decrease of the signal. Application: Inhale and exhale the creature, tighten and loosen, pump the pump. Limitations: A derivative dead zone and speed restrictions are needed. Equipment: Phone and external magnet. Preparation: Needs setup. Type: Input method. <a id=\"variant-m030\"></a>\n- Search for extremum. Action: Move the source or telephone, comparing local maxima and minima. Application: Find the tuning point, minimize interference, conduct research. Limitations: Local extremum does not guarantee the closest point to the magnet. Equipment: Telephone and external magnet. Preparation: Needs setup. Type: Game rule. <a id=\"variant-m031\"></a>\n- Signal stability. Action: Maintain the selected value with minimal fluctuations. Application: Neutralization, concentration, adjustment of musical tone. Limitations: Phone and surroundings must be fairly still. Equipment: Phone and external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m032\"></a>"},{"id":"context","title":"Context and limits","body":"Author's working classification for designing games and interactions. Options can overlap and combine; the list is not a generally accepted standard or proven exhaustive list. Application examples are conditional unless a specific verifiable observation is indicated nearby. Sources support individual techniques and technical limitations."}],"relations":[],"placements":[{"catalogId":"phone-magnetometer","id":"family-04","title":"Phone magnetometer interactions","url":"https://gamemechanics.pro/en/mechanics/phone-magnetometer/#family-04","categoryIds":["section-1"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"Field strength as analog input","description":"Measured field strength can continuously control a parameter. Distance to a particular magnet requires calibration of that magnet’s field.","image":{"src":"images/mechanics/sensor-physics-magnet-1.webp","width":665,"height":1440,"crop":{"x":51,"y":323,"width":563,"height":1034},"game":"Physics Toolbox Magnetometer","sourceUrl":"https://apps.apple.com/us/app/physics-toolbox-magnetometer/id1003749103?uo=4","originalUrl":"https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8f/f5/50/8ff550e6-5be0-28e2-4866-fa592a510357/02-measure-3-axes.png/720x1560bb.jpg","credit":"Chrystian Vieyra","rights":"© Chrystian Vieyra. Developer-distributed App Store screenshot. All rights reserved; excluded from MIT and CC BY 4.0.","caption":"Physics Toolbox: total field strength and three-axis readings","alt":"Physics Toolbox: total field strength and three-axis readings","markers":[{"x":50,"y":57,"label":"50.54 μT: a measurement that can be mapped to a parameter"}]},"tips":["Do not treat field strength as a universal distance to any object."],"examples":[{"title":"Physics Toolbox Magnetometer","url":"https://apps.apple.com/us/app/physics-toolbox-magnetometer/id1003749103?uo=4"}]}},"endsAt":null,"provenance":"Original editorial design catalog consolidated from project discussions on 2026-10-20. Complete discussion item lists and contextual limitations are preserved; linked primary sources support specific techniques, not the entire classification. English translation was prepared with machine assistance and editorial review.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/phone-magnetometer"}}