IFD:IAC WiSe22/sensors and interface schematics - Revision history

Clemensw at 15:30, 19 January 2023

2023-01-19T15:30:52Z

← Older revision		Revision as of 15:30, 19 January 2023
Line 20:		Line 20:

	[http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWEBmAHAJmgdgGzoRmACzICcpkORIC1SJNApgLRhgBQAHiM8glj3SpIPMoKwDq6amABqAegDyAYwAuAHQDOAMwBOjAI4BXRgDtlATy0ATRqsZqA9rvYBDceh7CeYHCObeqOBIrEhg8PBQ0KSoWDFYyFioCMiQRHA4UfHkWPio6URgqDgQ4RHsAO4ePkTUzOi5PKSZkJU+fjV1vv7erVX1jay17f7E1K1gpHW1QcxUPOn+8yLargA2moxR8AjsAEo8CGCec3UIpCfL4CCLIJhI91BRu8oLRLPzzEeX49sREMwsNAqJBcmA0KgLul0GAWMc-hxXvVUB86kJZr4njAIpByHj8QTyFlYjk8gUiiUEewAOaCFHtOlBETM9i6UQIH6MnhXMpwNrI1HVU5Qfl8Tm8DlNFpcBaNeG8NDBG7gTwAW0cpkcmlUrgARmtGFp5FoNYbNJoABaOVTsdLIN5Bd6idAiNieV3oAD6qE9kE9nFQqXBnoQvugYE9rE9XrA0Hwvs9x09yDDkHjrTt3OkN1mRGa4HhIhw3oTAaDKdDMAjUZjccrnuLKex6Zl9VIAgCJ3QOBCcWV8PCAGstAB+NqYoYyTLCvpSzpzgIs9zMfPCifzIJgEJb8A45mwCK1OJEBA4OIEdKkcFPXl8l0CdDZ5hOhonJ3URxGVQABy-NIXTortOyDuiKbJAV4owdIuN7wOw1gLmM4DTkhni2KsRhrDamYQU6IEFqBYBYA2RAJpepBhnglYHluVGRhGMbEcgtqQPaAyeIBSFuk8KZUGRuIUfcqbwO2PZ0TWybJm4BELEEj7TEEm7bmEe48Ni8DhDCBCkHwWAkO2aaweUtLcbwnimZiLJsuuMjyjycFVKZ8wWcMrTWfKqFPkhIjdqks7yfOAXPkyLH2scjpyaeMk+X6fF+uR0bQNRESiae8YSS6UnuScSGfN5dwunyBx5cMnGuU86QgKQWLPK2fgdkU-j8A1Ej9p4ACWpi-ja3DPsMrCoACyD9URjoqiAyifqY9i6PItj2E4Li9fgAJFDlFw+H2MgddNjDUroriqM4rZsKM+TgF0g1tSAayONSri6O1qgWqq7XKForiqt+aztdo7WMEtICtQNnjoMNm3VdtICaMo6xmp932-f9uhaAAFEdWhyEoagAJTsIqmQAGIQPaMiRKwICE-oxhmJY7BAA 1V/Oct frequency detector]		[http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWEBmAHAJmgdgGzoRmACzICcpkORIC1SJNApgLRhgBQAHiM8glj3SpIPMoKwDq6amABqAegDyAYwAuAHQDOAMwBOjAI4BXRgDtlATy0ATRqsZqA9rvYBDceh7CeYHCObeqOBIrEhg8PBQ0KSoWDFYyFioCMiQRHA4UfHkWPio6URgqDgQ4RHsAO4ePkTUzOi5PKSZkJU+fjV1vv7erVX1jay17f7E1K1gpHW1QcxUPOn+8yLargA2moxR8AjsAEo8CGCec3UIpCfL4CCLIJhI91BRu8oLRLPzzEeX49sREMwsNAqJBcmA0KgLul0GAWMc-hxXvVUB86kJZr4njAIpByHj8QTyFlYjk8gUiiUEewAOaCFHtOlBETM9i6UQIH6MnhXMpwNrI1HVU5Qfl8Tm8DlNFpcBaNeG8NDBG7gTwAW0cpkcmlUrgARmtGFp5FoNYbNJoABaOVTsdLIN5Bd6idAiNieV3oAD6qE9kE9nFQqXBnoQvugYE9rE9XrA0Hwvs9x09yDDkHjrTt3OkN1mRGa4HhIhw3oTAaDKdDMAjUZjccrnuLKex6Zl9VIAgCJ3QOBCcWV8PCAGstAB+NqYoYyTLCvpSzpzgIs9zMfPCifzIJgEJb8A45mwCK1OJEBA4OIEdKkcFPXl8l0CdDZ5hOhonJ3URxGVQABy-NIXTortOyDuiKbJAV4owdIuN7wOw1gLmM4DTkhni2KsRhrDamYQU6IEFqBYBYA2RAJpepBhnglYHluVGRhGMbEcgtqQPaAyeIBSFuk8KZUGRuIUfcqbwO2PZ0TWybJm4BELEEj7TEEm7bmEe48Ni8DhDCBCkHwWAkO2aaweUtLcbwnimZiLJsuuMjyjycFVKZ8wWcMrTWfKqFPkhIjdqks7yfOAXPkyLH2scjpyaeMk+X6fF+uR0bQNRESiae8YSS6UnuScSGfN5dwunyBx5cMnGuU86QgKQWLPK2fgdkU-j8A1Ej9p4ACWpi-ja3DPsMrCoACyD9URjoqiAyifqY9i6PItj2E4Li9fgAJFDlFw+H2MgddNjDUroriqM4rZsKM+TgF0g1tSAayONSri6O1qgWqq7XKForiqt+aztdo7WMEtICtQNnjoMNm3VdtICaMo6xmp932-f9uhaAAFEdWhyEoagAJTsIqmQAGIQPaMiRKwICE-oxhmJY7BAA 1V/Oct frequency detector]

			[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.0000026041666666666666+188.4969023643409+50+5+43%0A411+-416+-48+-512+-48+0+1+40+5+0+0+0.5+5+0+1%0Ad+-416+-48+-336+-48+2+default%0Ag+-336+0+-336+16+0%0Ar+-336+-48+-336+0+0+1000%0Ar+-336+-48+-208+-48+0+1000%0Ac+-208+-48+-208+16+0+0.00001+0.04855852264853732%0Ag+-208+16+-208+48+0%0Aw+-96+-64+-32+-64+0%0Aa+-176+-64+-96+-64+8+15+-15+1000000+0.04853377042562026+0.04855852264853732+100000%0Aw+-96+-64+-96+-144+0%0Aw+-176+-144+-176+-80+0%0A211+-32+-64+32+-64+0+1+48000+1%0Ar+-240+-144+-176+-144+0+10000%0Ar+-176+-144+-96+-144+0+500000%0Ag+-240+-144+-240+-128+0%0Aw+-176+-48+-208+-48+0%0Ax+-338+-232+-132+-229+4+24+Envelope%5CsFollower%0Ao+0+64+0+4098+2.5+0.00078125+0+2+0+3%0Ao+7+64+0+4099+5+0.00009765625+1+2+7+3%0A Envelope Follower]

			You can use an envelope follower or envelope detector to track the loudness of a signal and use that to control e.g. the loudness of a synthesizer.

Clemensw at 15:26, 19 January 2023

2023-01-19T15:26:40Z

← Older revision		Revision as of 15:26, 19 January 2023
Line 12:		Line 12:
	We can hookup our moisture sensor to the circuit above instead of the velostat sandwiched between two electrodes.		We can hookup our moisture sensor to the circuit above instead of the velostat sandwiched between two electrodes.
	[https://www.youtube.com/watch?v=DT6nZsixP0M Here] is a video showing how to build a moisture sensor. [https://ciat-lonbarde.net/tocante/index.html Ciat Lonbarde's Tocante] instrument might use this simple technique to sense touch.		[https://www.youtube.com/watch?v=DT6nZsixP0M Here] is a video showing how to build a moisture sensor. [https://ciat-lonbarde.net/tocante/index.html Ciat Lonbarde's Tocante] instrument might use this simple technique to sense touch.

			By replacing the velostat or moisture sensor with a Light Dependent Resistor (LDR) you can use the same circuit to detect ambient light variations.

	[http://www.falstad.com/circuit/circuitjs.html?ctz=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-dAwN6mN7hN6wNBgf74z6fbCkxVHZx8NmJLK0I5PSBML7k0GQz7wzAozG4wmM96S2nYBmHZBaHgZm7hJh6kWo9MyxgqZWI1jMARkuHa-Hk1Hm5FQfjlzFkP72HSCdhnAwEDZQWr6pAANY6AD8LGoEhsADEILQxrzFRAb7JFCoNCwgA Frequency Detector]		[http://www.falstad.com/circuit/circuitjs.html?ctz=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-dAwN6mN7hN6wNBgf74z6fbCkxVHZx8NmJLK0I5PSBML7k0GQz7wzAozG4wmM96S2nYBmHZBaHgZm7hJh6kWo9MyxgqZWI1jMARkuHa-Hk1Hm5FQfjlzFkP72HSCdhnAwEDZQWr6pAANY6AD8LGoEhsADEILQxrzFRAb7JFCoNCwgA Frequency Detector]

Clemensw: Created page with "This page shows a few ways to sense touch or force and convert it to an analog voltages. [http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWEAWB0DsZnMwZgEwBsAHA..."

2023-01-19T15:24:55Z

Created page with "This page shows a few ways to sense touch or force and convert it to an analog voltages. [http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWEAWB0DsZnMwZgEwBsAHA..."

New page

This page shows a few ways to sense touch or force and convert it to an analog voltages.

[http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWEAWB0DsZnMwZgEwBsAHAJySkgKRUq5UCmAtGGAFABOITyhy3YdIW7IwwlkKjg4nEWIGSmuEguE0wMrkvw0J4-OnyqpGyLKUq93ArsFrpZrXeMt8xY+s0C3L4rcmejtz4+PxW4c6B5gZG4SFhkQ7mfi4EHklaaVbyVlFcfMassYmmsjnOBblJAObcCGDFivXFPjRmAM7WjeJZBeogAC4cAK4MbJ3lkjl94IMjY52VFWEzEEOj4+ANhdtMq3MbAEpb3SfBCPY0yP1tUNAIbADucuKVyu57-GbPFh9vOtw+k8urpKjFAV9gUxwZ9gqEIVAofEEeEgT9nLDXH9IeifJiUrDvtwCf8EUTtAjpjjwK9+JU0SB6fwimS2ABDcDYYk0UK6FLuMBIFhIUzwWxgaCkKXEPxwVhS0hkbwOeDArBhUjCdXedxE7VYkC8nWI55Gg1mlJ6rmwlmEzZMAkYklfWbrBbGiJ4-Zu+0Yv2Kb3ze3IuLwwmuoOdaGGFwwwMbKM2VIA8NrSPWSwY95kiMJl4uUS0kwHMYAeUN125IFwCFiKQg7CjvASimbObTGx+bcxhdZXaWTV2kTYxx4BRybctUkrrikbXu5jbE6ZJjFMgAHhXxKJDUqlO5mUYAF7DAA67QAkgAZADKAFE2JuQsVKARxPJD+AAGoAelLAGMBnPABBAA7dp-wACwAG2Gdp2kfRlYlwSAkBQ9BrEgIxPwAWwASyA9obwABzZUDQOGUDqgGBg8OghgOHPSiABNz1LUicOI88OAYNloLw9o8IYgZEMICBtAFBAPgIJBPxIsiKKogBHUZoPo0TYjcdR8EoaMMM-ao8IAI0IsAv3PNk4LYIA 1V/Oct analog keyboard interface]

This is a vintage style analog keyboard interface that is used e.g. on the stylophone to convert touches to pitches in 1V/Oct. More sophisticated version with note priority and touch/release detection can be found on [http://musicfromouterspace.com/analogsynth_new/SINGLEBUSSKEYBOARD2007/SINGLEBUSSKEYBOARD2007.php music from outer space].

[http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWcMBMcUHYMGZIA4UA2ATmIxAUgpABZsKBTAWjDACgAnEJ4wqb3iEFUw8SGzAYaAvixrSmeKkxp5wyMVFiQkAMQCWAOwDmDLgAUODAM7WArlbYB3GfxZ8qKNgCUQKFAqC-gqSHvw0Iij8VDAIEoRRwa5J7n4gACYMAGYAhnYANgAuTPkM6eoxWpDsXElgfEnCfvBsxn4BQg0d9ZXiLin1fhhRqV6F4MRRnh2VEDzQCCgIYAQIZLxgNKxaCAh4xAhYNGtgaIR0GhnZeUWcE1Od0Rpwzo-KgzGvPHxBHcKvKUEimU-wAHtxsLJTkhsGoWP5aOAojl8vl9MYcoUAPYcAA61gAxmiAA5scEsPBzC4sSDkFRUaSnEAotEY7F4wkksl+bDEcDYaTYMD0YXkRnI1HozE4-FE-Sk8EBEbC+hCqG4RFMllS9myrnkyRw+pGyB89xIRl8YlWWwOBhfIGqVyfA2EOmnEKbbinCCWkDWBiGaw47lLOa7PwEbiLTV8AAyAFEACLcphoZU0d2ib3yWMgGXWAC2WP01kKdrYQA Velostat Pressure Sensor / Moisture-to-Voltage converter]

This circuit can be used to detect finger pressure or any force on a surface with the help of a pressure sensitive sheet material called 'velotstat'. You can find a tutorial how to build the physical sensor [https://learn.bela.io/tutorials/pure-data/sensors/diy-pressure-sensor/ here].

The same circuit can be used with a different type of physical interfaces as well. Instead of the velostat material as a variable resistor we can use a layout of wires known as a 'moisture sensor'.
We can hookup our moisture sensor to the circuit above instead of the velostat sandwiched between two electrodes.
[https://www.youtube.com/watch?v=DT6nZsixP0M Here] is a video showing how to build a moisture sensor. [https://ciat-lonbarde.net/tocante/index.html Ciat Lonbarde's Tocante] instrument might use this simple technique to sense touch.

[http://www.falstad.com/circuit/circuitjs.html?ctz=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-dAwN6mN7hN6wNBgf74z6fbCkxVHZx8NmJLK0I5PSBML7k0GQz7wzAozG4wmM96S2nYBmHZBaHgZm7hJh6kWo9MyxgqZWI1jMARkuHa-Hk1Hm5FQfjlzFkP72HSCdhnAwEDZQWr6pAANY6AD8LGoEhsADEILQxrzFRAb7JFCoNCwgA Frequency Detector]

To convert the frequency of a musical signal to a voltage, we can use this relative simple frequency detector circuit. Note that the output is linear in frequency, so it won't match the 1V/oct input of an analog synthesizer. That means pitches will be out of tune. Their might be ways to remedy this by using a logarithmic amplifier instead of the linear amplifier in the schematic. This is shown by the next schematic.

[http://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWEBmAHAJmgdgGzoRmACzICcpkORIC1SJNApgLRhgBQAHiM8glj3SpIPMoKwDq6amABqAegDyAYwAuAHQDOAMwBOjAI4BXRgDtlATy0ATRqsZqA9rvYBDceh7CeYHCObeqOBIrEhg8PBQ0KSoWDFYyFioCMiQRHA4UfHkWPio6URgqDgQ4RHsAO4ePkTUzOi5PKSZkJU+fjV1vv7erVX1jay17f7E1K1gpHW1QcxUPOn+8yLargA2moxR8AjsAEo8CGCec3UIpCfL4CCLIJhI91BRu8oLRLPzzEeX49sREMwsNAqJBcmA0KgLul0GAWMc-hxXvVUB86kJZr4njAIpByHj8QTyFlYjk8gUiiUEewAOaCFHtOlBETM9i6UQIH6MnhXMpwNrI1HVU5Qfl8Tm8DlNFpcBaNeG8NDBG7gTwAW0cpkcmlUrgARmtGFp5FoNYbNJoABaOVTsdLIN5Bd6idAiNieV3oAD6qE9kE9nFQqXBnoQvugYE9rE9XrA0Hwvs9x09yDDkHjrTt3OkN1mRGa4HhIhw3oTAaDKdDMAjUZjccrnuLKex6Zl9VIAgCJ3QOBCcWV8PCAGstAB+NqYoYyTLCvpSzpzgIs9zMfPCifzIJgEJb8A45mwCK1OJEBA4OIEdKkcFPXl8l0CdDZ5hOhonJ3URxGVQABy-NIXTortOyDuiKbJAV4owdIuN7wOw1gLmM4DTkhni2KsRhrDamYQU6IEFqBYBYA2RAJpepBhnglYHluVGRhGMbEcgtqQPaAyeIBSFuk8KZUGRuIUfcqbwO2PZ0TWybJm4BELEEj7TEEm7bmEe48Ni8DhDCBCkHwWAkO2aaweUtLcbwnimZiLJsuuMjyjycFVKZ8wWcMrTWfKqFPkhIjdqks7yfOAXPkyLH2scjpyaeMk+X6fF+uR0bQNRESiae8YSS6UnuScSGfN5dwunyBx5cMnGuU86QgKQWLPK2fgdkU-j8A1Ej9p4ACWpi-ja3DPsMrCoACyD9URjoqiAyifqY9i6PItj2E4Li9fgAJFDlFw+H2MgddNjDUroriqM4rZsKM+TgF0g1tSAayONSri6O1qgWqq7XKForiqt+aztdo7WMEtICtQNnjoMNm3VdtICaMo6xmp932-f9uhaAAFEdWhyEoagAJTsIqmQAGIQPaMiRKwICE-oxhmJY7BAA 1V/Oct frequency detector]