Timeline for Detect presence of 12MHz squarewave without oscilloscope
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 1 at 17:06 | answer | added | hacktastical | timeline score: 1 | |
| Apr 1 at 15:12 | vote | accept | dragoncoder047 | ||
| Apr 1 at 14:50 | comment | added | Marcus Müller | @dragoncoder047 obviously, then don't restrict yourself to what Arduino exposes.All the hardware is still there, even if arduino doesn't offer convenience functionality around it. | |
| Apr 1 at 14:43 | answer | added | Marcus Müller | timeline score: 3 | |
| Apr 1 at 14:41 | comment | added | dragoncoder047 | @Justme It might be possible in theory to use the ESP32's PCNT (pulse counter) peripheral but the Arduino core (which I am using) doesn't expose the PCNT api's (yet). lmk if you know of another way. | |
| Apr 1 at 14:27 | answer | added | Andy aka | timeline score: 1 | |
| Apr 1 at 13:32 | comment | added | Justme | Can you feed the 12 MHz output back to some ESP32 input pin that can measure it? | |
| Apr 1 at 13:27 | history | edited | dragoncoder047 | CC BY-SA 4.0 |
add clarifications from comments' requests
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| Apr 1 at 13:24 | comment | added | periblepsis | dragon, what's the expected frequency? I used to use an AM radio set nearby and tuned it around a bit. Worked just fine. | |
| Apr 1 at 13:11 | answer | added | Russell McMahon♦ | timeline score: 2 | |
| Apr 1 at 13:11 | comment | added | Justme | This question may not provide helpful answers. There are multiple ways to detect presence and frequency of the signal, but whether you have the tools or equipment to implement any of them is unknown. What do you have then? A frequency counter? Logic analyzer? Another ESP32 or other MCU you can program to measure the signal? Also how do you know the other microcontroller can accept 3.3V square wave on crystal pin from ESP32 without damage, or that you are using the correct pin to input it? | |
| Apr 1 at 13:02 | answer | added | Math Keeps Me Busy | timeline score: 3 | |
| Apr 1 at 13:01 | answer | added | glen_geek | timeline score: 6 | |
| Apr 1 at 13:00 | comment | added | Attie | "megahertz-range", can you be more specific? How are you driving this signal? (bitbang vs timer peripheral) Do you have a multimeter with a frequency measurement mode? Do you have an oscilloscope? What frequencies can you inspect / measure? (line in on a PC sound card can do ~15kHz no problem, often much higher) Can you run the target slower? (in your visible range) | |
| S Apr 1 at 12:48 | review | First questions | |||
| Apr 1 at 13:05 | |||||
| S Apr 1 at 12:48 | history | asked | dragoncoder047 | CC BY-SA 4.0 |