I just try components for a preamp with PGA2320. Here are a few photos. Some Software-snippets are already running. I like the display. A dark amber-colored display behind golden-brown plexiglass.
regards Olaf
regards Olaf
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Looking good
I like your display - very clear and clean. It's also nice to see the (homemade?) PCBs - I've been using stripboard and protoboard and a set of pre-built modules for my effort - I doubt if it will be as tidy as yours.
What are you using to control the PGA? I'm using a standard Arduino Leonardo board for simplicity...
tim
I like your display - very clear and clean. It's also nice to see the (homemade?) PCBs - I've been using stripboard and protoboard and a set of pre-built modules for my effort - I doubt if it will be as tidy as yours.
What are you using to control the PGA? I'm using a standard Arduino Leonardo board for simplicity...
tim
Hi Tim,
I have seen your thread - nice work!
I mostly use AVR microcontroller and program with BASCOM. The controller board is "my" own standard. So I have always the same connection schemes for the peripherals.
The display is a EADOGM128. You can buy it with different display colors and backlights.
I got the remote control for little money from China (see photos).
Planned is still a level indicator and a output-buffer for other devices.
regards Olaf
I have seen your thread - nice work!
I mostly use AVR microcontroller and program with BASCOM. The controller board is "my" own standard. So I have always the same connection schemes for the peripherals.
The display is a EADOGM128. You can buy it with different display colors and backlights.
I got the remote control for little money from China (see photos).
Planned is still a level indicator and a output-buffer for other devices.
regards Olaf
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Very nice Olaf ,
A few folks on other posts have had issues with noise. What is your experience.
Nixie VU Meter - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement
i guess another thing to do is to use the ADC in the AVR
A few folks on other posts have had issues with noise. What is your experience.
Nice to hear. I also am using this compiler for my portable radio media player project. If you want to add a cheap FM radio, I can provide you with some details. Looks like you have lots of room left in that box
Check out the Elektor nixie tube project = neat. Linear Audio guy, Jan Didden said he made one.
Nixie VU Meter - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement
i guess another thing to do is to use the ADC in the AVR
Hi,
I can not confirm this. I have a preamp built with PGA2311 who works very well. With the PGA2320 I also made no negative experiences.
The radio is not in focus (one of the "very nice to have" features) because HF in preamplifiers...
That's a nice thing. I made a VU-Meter with the russian IN-9. It looks so good. But it have to wait for a tube amplifier. Also the magic eye (see fotos).
The preamplifier has the same enclosure then my spectrum analyser (http://www.diyaudio.com/forums/analog-line-level/226383-christmas-project-audio-analyser.html). I think is a lot of illumination ;-)
regards Olaf
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Yes, you are right. With a MCU running - all discussions about HF is nonsense...
What chipset do you use for the radio, TDA5767 ist often used or RDA5802. I saw some modules on electrodragon.com. Nice toys...
regards Olaf
Looks great. I have a module of SI4735 from elektor but found no time to play with it. Would be nice to get some basic routines in bascom to start.
Your equipment has some other features like usb, what is it, mp3?
Regards Olaf
Hi Olaf,
The Elektor DSP radio - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement
Software is already written in Bascom-AVR for this module.
USB audio codec, using TI PCM2902B, this functions as a sound card.
rick
Which one? DSP radio? or the earlier modulebus adapter?
The Elektor DSP radio - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement
Software is already written in Bascom-AVR for this module.
I am using Rohm BU9458, which reads MP3/WMA/ACC files from USB disk (jump/flash) drive and SD card.
USB audio codec, using TI PCM2902B, this functions as a sound card.
rick
Yes it is. If you use the forward-button (also the push button on the encoder), then you select
- volume
- channel
- mute
- save
the choosen subject is shown inverted on the display. With "+" and "-" you can change the level.
Problem was the NEC-protocol for the remote control, but I found a application note on
mcselec.com with the right code.
regards Olaf
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Hi Rick,
I used only the module with the chip. It works googd with some software snippets published by elektor. But I made no other experiments.
regards Olaf
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I have now a working Arduino controlled PGA2320 pre-amp with relay input selection and balanced DRV134 output. All working with 16x2 text LCD showing source and bar graph volume. 2 push buttons for input +/- and 2 more for volume +/- and IR from existing CD remote (with dedicated amplifier buttons). At the moment it's all (temporarily) residing in a defunct CD player case.
Would like suggestions for linking it to power amplifiers which will be sited close to speakers and connected by balanced leads. I wish to implement a standby/activate signal from preamp to power amps. Only need a single core as digital and analogue grounds are connected. Seems a bit lame having to run a second cable alongside the balanced lead. I was thinking of using Maplin 2mm plugs as they couldn't be mistaken for any other purpose but this must be a common requirement and I wondered if there were any precedents as to what to use.
Would like suggestions for linking it to power amplifiers which will be sited close to speakers and connected by balanced leads. I wish to implement a standby/activate signal from preamp to power amps. Only need a single core as digital and analogue grounds are connected. Seems a bit lame having to run a second cable alongside the balanced lead. I was thinking of using Maplin 2mm plugs as they couldn't be mistaken for any other purpose but this must be a common requirement and I wondered if there were any precedents as to what to use.
TPA3100 or TPA3116 or TPA3118
Check out the TPA3116 thread.
I designed a portable radio using si4735d60 a few years ago, using tpa3100 and max9729, now working on si4770a20 design. lots of code for ui, still going at it. I started with code from elektor article and its keeps growing.
enjoy!!
Check out the TPA3116 thread.
I designed a portable radio using si4735d60 a few years ago, using tpa3100 and max9729, now working on si4770a20 design. lots of code for ui, still going at it. I started with code from elektor article and its keeps growing.
enjoy!!
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Very nice work Olaf!
Olaf,
Can you tell what is the amber-colored display you are using and where did you get it from? Also, where did you get the golden-brown plexiglass?
I love the way it looks!
Thanks so much
Olaf,
Can you tell what is the amber-colored display you are using and where did you get it from? Also, where did you get the golden-brown plexiglass?
I love the way it looks!
Thanks so much
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