<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
	<id>https://nurdspace.nl/index.php?action=history&amp;feed=atom&amp;title=Eurocrack_opamp</id>
	<title>Eurocrack opamp - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://nurdspace.nl/index.php?action=history&amp;feed=atom&amp;title=Eurocrack_opamp"/>
	<link rel="alternate" type="text/html" href="https://nurdspace.nl/index.php?title=Eurocrack_opamp&amp;action=history"/>
	<updated>2026-05-06T18:13:54Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.39.4</generator>
	<entry>
		<id>https://nurdspace.nl/index.php?title=Eurocrack_opamp&amp;diff=12064&amp;oldid=prev</id>
		<title>Flok at 21:35, 15 July 2022</title>
		<link rel="alternate" type="text/html" href="https://nurdspace.nl/index.php?title=Eurocrack_opamp&amp;diff=12064&amp;oldid=prev"/>
		<updated>2022-07-15T21:35:17Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 23:35, 15 July 2022&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l2&quot;&gt;Line 2:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* see [Nurdspace eurorack raspberry pi hat]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* see &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[&lt;/ins&gt;[Nurdspace eurorack raspberry pi hat&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]&lt;/ins&gt;]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key nurdspace_wiki:diff::1.12:old-12063:rev-12064 --&gt;
&lt;/table&gt;</summary>
		<author><name>Flok</name></author>
	</entry>
	<entry>
		<id>https://nurdspace.nl/index.php?title=Eurocrack_opamp&amp;diff=12063&amp;oldid=prev</id>
		<title>Flok: Created page with &quot;=== Testing of opamps for Eurocrack module ===   * see [Nurdspace eurorack raspberry pi hat]   === method of testing ===  * sine wave from Doeper A-147 VCLFO module  * [https:...&quot;</title>
		<link rel="alternate" type="text/html" href="https://nurdspace.nl/index.php?title=Eurocrack_opamp&amp;diff=12063&amp;oldid=prev"/>
		<updated>2022-07-15T21:34:47Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;=== Testing of opamps for Eurocrack module ===   * see [Nurdspace eurorack raspberry pi hat]   === method of testing ===  * sine wave from Doeper A-147 VCLFO module  * [https:...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;=== Testing of opamps for Eurocrack module ===&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
* see [Nurdspace eurorack raspberry pi hat]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== method of testing ===&lt;br /&gt;
&lt;br /&gt;
* sine wave from Doeper A-147 VCLFO module&lt;br /&gt;
&lt;br /&gt;
* [https://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWcMBMcUHYMGZIA4UA2ATmIxAUgpABZsKBTAWjDACgBDcFPEFFGnwwo+AkL2zR6VMPHjhoKbBgStINBCpI0MvMIuU1Sxk6T1zIbAE7c9PISLD2q2XHDYB3W96e80vSy9MR3tg0UFLG18+fCgYgOQ5NgAlOP8QJkJBMBoI8FoqJCpi6ARrbwEZe2wEERk8JIBzbxqQiTw8yIqaYr4euLd4FLT+pga+PASqfslpOJgygHsQeiy4ntJqGDkyQgRCFCK+FZW2IA schematic] for +/-5V to 3.3V in breadboard&lt;br /&gt;
&lt;br /&gt;
* most opamps were tested with a 33k resistor from output to inverting input of the opamp. the best opamp was also tried with 30k ohm.&lt;br /&gt;
&lt;br /&gt;
* most opamps showed clipping&lt;br /&gt;
&lt;br /&gt;
=== TL072 ===&lt;br /&gt;
&lt;br /&gt;
* datasheet: https://www.ti.com/product/TL072&lt;br /&gt;
&lt;br /&gt;
[[File:Tl072.png|640px]]&lt;br /&gt;
&lt;br /&gt;
=== LM358P ===&lt;br /&gt;
&lt;br /&gt;
* datasheet: https://www.ti.com/lit/ds/symlink/lm358b.pdf?ts=1657890916144&lt;br /&gt;
&lt;br /&gt;
[[File:Cm358p.png|640px]]&lt;br /&gt;
&lt;br /&gt;
=== MCP6002 ===&lt;br /&gt;
&lt;br /&gt;
* datasheet: https://cdn-shop.adafruit.com/datasheets/MCP3008.pdf&lt;br /&gt;
&lt;br /&gt;
[[File:Mcp6002.png|640px]]&lt;br /&gt;
&lt;br /&gt;
Also tried with 30k resistor as with 33k, the ADC used (MCP3008) clipped too much:&lt;br /&gt;
&lt;br /&gt;
[[File:Mcp6002 30k.png|640px]]&lt;/div&gt;</summary>
		<author><name>Flok</name></author>
	</entry>
</feed>