Tiny Tester - Revision history

Zander: /* Function */

2026-04-08T23:13:28Z

‎Function

Zander: /* Controls */

2026-02-18T01:40:50Z

‎Controls

Zander at 01:38, 18 February 2026

2026-02-18T01:38:33Z

Zander: /* Function */

2026-02-18T01:35:40Z

‎Function

Zander: /* Function */

2026-02-18T01:27:18Z

‎Function

Zander: /* Function */

2026-02-18T01:24:42Z

‎Function

Zander: /* Probe */

2026-01-11T03:29:41Z

‎Probe

Zander at 03:29, 11 January 2026

2026-01-11T03:29:23Z

Zander at 03:14, 11 January 2026

2026-01-11T03:14:52Z

Zander at 03:12, 11 January 2026

2026-01-11T03:12:15Z

@@ Line 17: / Line 17: @@
 Note that the red-highlighted portions of the circuit diagram make a constant feedback loop.  There is no "In".  This feedback loop causes an oscillation that is tuned by the capacitors for an oscillating signal.  This signal is generated at a human-audible level by the choice and placement of the capacitors (designated as C1, C2, and C3) in the circuit.  As this is a circuit powered by direct current (DC), that oscillation is actually an AC signal, that because of how it's tuned, will create an audio tone that can be sent through an effect pedal and, ultimately, speakers.
-Per the notes in the Tiny Tester documentation, if one doubles, triples, or quadruples the capacitor values of C1, C2, and C3, a lower tone will be generated. This would be helpful if you find that the "stock" tone is too high.
+Per the notes in the Tiny Tester documentation, if one doubles, triples, or quadruples the capacitor values of C1, C2, and C3, a lower tone will be generated. This would be helpful if your finding is that the "stock" tone is too high.
 [[File:JMKPCBs_TinyTester_Schem.png|center|frame|<div style="text-align:left">Modified [[JMKPCBs]] Tiny Tester Schematic, showing how a test tone is created.</div><div style="text-align:right">&copy; 2011, JMKPCBs</div>]]

@@ Line 12: / Line 12: @@
 * Knob 1 - '''"Level":''' Controls the output level of the generated tone
 * Switch 1 - '''"Output Mode":''' Two-way toggle to switch between the instrument jack output, or the probe output.
 == Function ==

@@ Line 2: / Line 2: @@
   | __TOC__
   |}
-The [[JMK PCBs]] Tiny Tester.  It's an oscillator that creates a single test tone.
+The [[JMK PCBs]] Tiny Tester.  It's an oscillator circuit that creates a single tone intended for testing and troubleshooting.
-This project will be the basis of our first YouTube video!  Woohoo!
+We're currently operating with the plan that this PCB will be the basis of our first YouTube video!  Woohoo!
 == Description ==

@@ Line 15: / Line 15: @@
 == Function ==
 Note that the red-highlighted portions of the circuit diagram make a constant feedback loop.  There is no "In".  This feedback loop causes an oscillation that is tuned by the capacitors for an oscillating signal.  This signal is generated at a human-audible level by the choice and placement of the capacitors (designated as C1, C2, and C3) in the circuit.  As this is a circuit powered by direct current (DC), that oscillation is actually an AC signal, that because of how it's tuned, will create an audio tone that can be sent through an effect pedal and, ultimately, speakers.
 [[File:JMKPCBs_TinyTester_Schem.png|center|frame|<div style="text-align:left">Modified [[JMKPCBs]] Tiny Tester Schematic, showing how a test tone is created.</div><div style="text-align:right">&copy; 2011, JMKPCBs</div>]]

@@ Line 14: / Line 14: @@
 == Function ==
-Note that the red-highlighted portions of the circuit diagram make a constant feedback loop.  There is no "In".  This feedback loop causes an oscillation that is tuned by the capacitors for an oscillating signal.  This signal is generated at a human-audible level by the choice and placement of the capacitors in the circuit.  In creating this electronic oscillation, that AC signal will create an audio tone is created that can be sent through effects or speakers.
+Note that the red-highlighted portions of the circuit diagram make a constant feedback loop.  There is no "In".  This feedback loop causes an oscillation that is tuned by the capacitors for an oscillating signal.  This signal is generated at a human-audible level by the choice and placement of the capacitors (designated as C1, C2, and C3) in the circuit.  As this is a circuit powered by direct current (DC), that oscillation is actually an AC signal, that because of how it's tuned, will create an audio tone that can be sent through an effect pedal and, ultimately, speakers.
 [[File:JMKPCBs_TinyTester_Schem.png|center|frame|<div style="text-align:left">Modified [[JMKPCBs]] Tiny Tester Schematic, showing how a test tone is created.</div><div style="text-align:right">&copy; 2011, JMKPCBs</div>]]

@@ Line 24: / Line 24: @@
 === Probe ===
-We think this is the most useful application of the Tiny Tester for troubleshooting effects.  Our JMKPCBs [[Testing Rig]] uses a probe to '''LISTEN''' for where a signal stops.  When '''Probe Mode''' is switched on the Tiny Tester,  the probe can then be used to '''INJECT''' a test signal at any point along a PCB's architecture.  The main use would be if you don't have any active electronics installed into your effect, but you want to make sure signal is getting through the various parts of the circuit in between those active electronics.  When used to its fullest capability in tandem with the Testing Rig, it should be possible to both inject a test signal, and then listen for the same signal, so as to verify where problems may be happening in our assembly.  As such, the Tiny Tester is essentially a continuity tester.
+We think this is the most useful application of the Tiny Tester for troubleshooting effects.  Our JMK PCBs [[Testing Rig]] uses a probe to '''LISTEN''' for where a signal stops.  When '''Probe Mode''' is switched on the Tiny Tester,  the probe can then be used to '''INJECT''' a test signal at any point along a PCB's architecture.  The main use would be if you don't have any active electronics installed into your effect, but you want to make sure signal is getting through the various parts of the circuit in between those active electronics.  When used to its fullest capability in tandem with the Testing Rig, it should be possible to both inject a test signal, and then listen for the same signal, so as to verify where problems may be happening in our assembly.  As such, the Tiny Tester is essentially a continuity tester.
 == Build Details ==

@@ Line 2: / Line 2: @@
   | __TOC__
   |}
-The JMKPCBs Tiny Tester.  It's an oscillator that creates a test tone.
+The [[JMK PCBs]] Tiny Tester.  It's an oscillator that creates a single test tone.
-This project will be the basis of our first YouTube video.
+This project will be the basis of our first YouTube video!  Woohoo!
 == Description ==
@@ Line 19: / Line 19: @@
 == Operation ==
 === Instrument ===
 Switch the '''Output Mode''' to "Instrument" and use an instrument cable plugged into the 1/4" jack.  The Tiny Tester's test signal will be routed through the 1/4" jack for plugging into an effect with an input jack for testing.