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Spectrum analyser Equalizer project how to go about it?
- Thread starter Maglatron
- Start date
what do you mean its psoc creator
I use Simetrix spice simulator. Was Analog Devices main sim until they bought Linear
tech and sadly settled on LTC Spice.
Use Digikey and look at PSOC 5LP family chip pricing.
Just a thought but I am thinking you need to hire a consultant to proceed with
complete product definition, goals, choices.
There are partners, you will have to search on it at Infineon, that are experienced
and can provide you with services needed.
Thinking of using this!
so what is window averaging?
so I think this might be a good alternative to the CY8CKIT-050, the esp32 audio spectrum analyzer
does anybody know of the esp32 and if I could put that to use?
so what is window averaging?
so I think this might be a good alternative to the CY8CKIT-050, the esp32 audio spectrum analyzer
does anybody know of the esp32 and if I could put that to use?
I just got notified Freesoc2 board still available, it has the I/O also
you may need. check it against the 050 board. Note its an obsolete
board, but not the PSOC on it. I believe you can still get the gerbers for
this board on GitHub, in case you needed more at a later time, check
this out.
github.com
Regards, Dana.
you may need. check it against the 050 board. Note its an obsolete
board, but not the PSOC on it. I believe you can still get the gerbers for
this board on GitHub, in case you needed more at a later time, check
this out.
Build software better, together
GitHub is where people build software. More than 100 million people use GitHub to discover, fork, and contribute to over 330 million projects.
github.com
Regards, Dana.
I think I want to take this route!
If you're considering using the 74LS95 (often just referenced as 7495), it's a 4-bit parallel-access shift register. It can be used to expand the number of outputs like the 74HC595, but with some differences in capabilities and setup. When paired with multiplexing, this can be a method to drive a large matrix of LEDs.
Let's delve into the idea of using the 7495 shift register combined with multiplexing for controlling a matrix of LEDs:
can you explain it in more detail, if you can? I now want 25 columns and 20 rows utilising 500 LED's and I want 3 decibel to light each led in a column
If you're considering using the 74LS95 (often just referenced as 7495), it's a 4-bit parallel-access shift register. It can be used to expand the number of outputs like the 74HC595, but with some differences in capabilities and setup. When paired with multiplexing, this can be a method to drive a large matrix of LEDs.
Let's delve into the idea of using the 7495 shift register combined with multiplexing for controlling a matrix of LEDs:
1. 7495 Shift Register:
- Inputs:
- Four data inputs (A, B, C, D)
- Shift/Load Control input
- Clock input
- Clock inhibit (to disable shifting)
- Outputs:
- Four parallel outputs (QA, QB, QC, QD)
- One serial output (QS, which is QD shifted out)
2. Setting Up 7495 for LED Matrix:
- To control a column of LEDs, use the parallel outputs (QA, QB, QC, QD).
- Daisy-chain multiple 7495s by connecting the QS (serial out) of one to the A (or any other data input) of the next, allowing you to shift data through multiple registers.
3. Multiplexing:
Instead of controlling every LED individually, multiplexing allows you to control rows or columns of LEDs by rapidly switching between them:- Say, for a 25x20 LED matrix, you'd consider 25 columns and 20 rows.
- For columns, you'd need seven 7495s (since 7 * 4 outputs = 28, which covers 25 columns).
- For rows, you'd need five 7495s (since 5 * 4 outputs = 20, which covers all rows).
4. Driving the Matrix:
- To light up a specific LED, you'd set the appropriate column to HIGH (or source current) and the corresponding row to LOW (or sink current). All other rows would be set HIGH to ensure they don't sink current from other columns.
5. Rapid Scanning:
- In practice, you'd rapidly scan through the rows, one at a time, setting the columns for each row appropriately. This rapid scanning happens faster than the human eye can perceive, so it appears as though multiple LEDs are lit simultaneously, even though only one row is active at a time.
6. Software Control:
- Use the ESP32 (or another microcontroller) to shift the right patterns into the shift registers to control which LEDs are on or off.
- For every cycle:
- Shift out the data for a row and the corresponding columns.
- Activate the row.
- Pause briefly (e.g., 1ms).
- Move to the next row.
Notes & Tips:
- Current Limiting: Always use current-limiting resistors with LEDs.
- Driving Capability: Check the driving/sinking capability of the 7495. You might need transistors to handle the LED current, especially if multiple LEDs in a column are on simultaneously.
- Ghosting: Rapid multiplexing can sometimes result in ghosting (unintended LEDs showing faint light). Ensure you're switching rows off before moving to the next.
- Refresh Rate: The entire matrix should be refreshed at a rate of at least 60Hz (scanning all rows 60 times per second) to avoid visible flickering.
- Power Consumption: Multiplexing can reduce average power consumption since only one row of LEDs is on at any given time.
- Alternative Chips: If 7495 isn't readily available, consider other shift registers like the 74HC595 or other suitable alternatives.
can you explain it in more detail, if you can? I now want 25 columns and 20 rows utilising 500 LED's and I want 3 decibel to light each led in a column
I think this method is more pactical for me I need it explaining though so the actual name for the 7459 is 74HC595 and it's a shift reigister I want to know how to utilise 7 of them 4 for the x axis 25 bands and 3 for the y axis 20 for a total of 500 LED's so there will be 7 74HC595 chips. I know I have changed it again but I want to make use of the full 500 LED's and I want to incorpoate it with the esp32 arduino!
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