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I see. I like the "precision" circuit better with it's warped curve to make it easier to find the center point.

I've never seen an attenuverter like that.

What I've seen has a pot with the two ends connected to the + and - amp inputs with the input on the wiper. When you rotate the pot, if it's at the + inp ...

What I see is one non-inverting amplifier, followed by two inverting amplifiers. The two inverting amps for a non-inverting amp, so all you have is non-inverting amps. Hence no inversion.

I've been looking over this, and I'm trying to work out what 'control change' means. Does this mean continuous controllers etc? And, (cos my coding is, er, poor, and I may have overlooked the bleedi ...

Pest trouble never seems to end, but it seems nature has a solution. I went out to look at my peppers and found millions of aphids on one of the plants (well, it looked like millions, they were every ...

I just don’t understand how leds can make such a sound...

I thought the same, but then noticed the label "LED thing". It's more than just a LED, and there is mention of "flashing& ...

I refer here to dual supply modules:

In fact, cross UPS voltage compatibility is a rather large issue. And people do it rather frequently.

Some modules will work properly.
Some modules will al ...

This is a great example of alias reduction and elimination.

Early in my exploration of DSP, I was using an FPGA with a DAC that could run at 500 kHz sample rate. I wrote a monosynth with 4 oscilla ...

It is best to use one power supply voltage to power everything.

With different voltages for different circuits, the outputs from the higher voltage unit can overdrive and even damage the inputs or ...

It seems to me you should be able to accomplish your goal. Optimization could also give you either more voices or more features.

Check https://os.mbed.com/platforms/ST-Nucleo-H743ZI2/

The H743ZI2 can operate up to 400 MHz, not 480 MHz. I've worked with this board. Currently, I'm working with someone else to develop what is ...

I can't help directly, but I can offer my own personal observation. That is that it's difficult to choose music for another person even if you know them well. I don't fully understand why I like eac ...

Interesting, I'll have to see if I can get the N P and K as 3 separate compounds. In my case, I could have used just N. What I have is heavier for N than P or K, but P and K measured as sufficient. ...

What does it mean for a plant fertilizer to be "organic". I know that in USA we have laws that define exactly what that means for food products, but I'd not heard of it applied to fertilize ...

Here's another sample, just the sequenced parts, but I've added bass drum and snare in a simple thing to rock to on a guitar Cool

In this you can hear the random improvisation on the bass. The perc ...

Here's a snippet of a practice session. Obviously, I need a lot more, but you can hear also the bass and percussion (just a ride cymbal). The bass is a Karplus-Strong design that should eventually e ...

The name is tentatively 'seq1', if I find that already exists, I'll change it.

Anyway, I've wanted a metronomic tool for practicing guitar and ukulele for a long time. For what I do, I just need a ...

Since I could not get pepper seeds to grow beyond one inch tall, I bought some already established pepper seedlings and planted them.

2 were planted in pots with old soil and one was planted in bra ...

I don't understand powering a DAC from an MPU data pin either. For one thing, the data pin could be noisy. And another pin for ground - more noise.

A regulated voltage from the PSU and the real g ...

Hello..as per my knowledge with Wasp VCF, If the regulator is working right, there will be 5v on pin14 of the 4069. Note that both chips will work happily on 9v supply, so I'm puzzled as to why 5v reg ...

One of my first electronics jobs was at MSA (Mine Safety Appliances). One of the many things they sold were electronic gas analyzers for various purposes. I serviced these devices. One of these was ...

Beautiful plants PHOBoS!

I've finally gotten some success with mine. I couldn't get pepper seedlings to grow beyond on inch tall, so I bought some pre-started seedlings. Those are doing great. I ...

I can't be sure in this case, but there can be reasons for such an arrangement. For example, if there are power traces that go to the other side of the board and those traces are skinny, extra caps c ...

I looked again at the scope traces. What I noticed is that it seems that under little to no load, there's no in-your-face ripple, but as you increased the load current, there began to appear more and ...

That is definitely more droop than the datasheet specifies, so unless it's damaged, it wouldn't be the LM3xx IC at fault.

PSUs need to transfer rather large amounts of current. To do that efficien ...

Author	Message
Topic: Attenuverter Error
JovianPyx Replies: 13 Views: 4735	Posted: Wed Oct 07, 2020 11:46 pm Subject: Attenuverter Error Forum: DIY Hardware and Software
JovianPyx Replies: 13 Views: 4735	I see. I like the "precision" circuit better with it's warped curve to make it easier to find the center point.
Topic: Attenuverter Error
JovianPyx Replies: 13 Views: 4735	Posted: Wed Oct 07, 2020 6:28 pm Subject: Attenuverter Error Forum: DIY Hardware and Software
JovianPyx Replies: 13 Views: 4735	I've never seen an attenuverter like that. What I've seen has a pot with the two ends connected to the + and - amp inputs with the input on the wiper. When you rotate the pot, if it's at the + inp ...
Topic: Attenuverter Error
JovianPyx Replies: 13 Views: 4735	Posted: Wed Oct 07, 2020 5:52 pm Subject: Attenuverter Error Forum: DIY Hardware and Software
JovianPyx Replies: 13 Views: 4735	What I see is one non-inverting amplifier, followed by two inverting amplifiers. The two inverting amps for a non-inverting amp, so all you have is non-inverting amps. Hence no inversion.
Topic: Midi to CV design -- Soliciting advice
JovianPyx Replies: 58 Views: 42957	Posted: Wed Sep 16, 2020 3:38 pm Subject: Re: control change Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 58 Views: 42957	I've been looking over this, and I'm trying to work out what 'control change' means. Does this mean continuous controllers etc? And, (cos my coding is, er, poor, and I may have overlooked the bleedi ...
Topic: The Garden
JovianPyx Replies: 792 Views: 319322	Posted: Sat Aug 29, 2020 9:26 am Subject: The Garden Forum: Discussion » Schmooze
JovianPyx Replies: 792 Views: 319322	Pest trouble never seems to end, but it seems nature has a solution. I went out to look at my peppers and found millions of aphids on one of the plants (well, it looked like millions, they were every ...
Topic: Accidental copy of Razmasynth Super Warp Generator...
JovianPyx Replies: 5 Views: 3846	Posted: Wed Aug 26, 2020 3:43 pm Subject: Accidental copy of Razmasynth Super Warp Generator... Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 5 Views: 3846	I just don’t understand how leds can make such a sound... I thought the same, but then noticed the label "LED thing". It's more than just a LED, and there is mention of "flashing& ...
Topic: New to Lunetta with some questions
JovianPyx Replies: 37 Views: 19919	Posted: Thu Aug 20, 2020 7:34 am Subject: New to Lunetta with some questions Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
JovianPyx Replies: 37 Views: 19919	I refer here to dual supply modules: In fact, cross UPS voltage compatibility is a rather large issue. And people do it rather frequently. Some modules will work properly. Some modules will al ...
Topic: Virtual Analog Synthesizer
JovianPyx Replies: 72 Views: 48740	Posted: Wed Aug 19, 2020 11:20 am Subject: Virtual Analog Synthesizer Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 72 Views: 48740	This is a great example of alias reduction and elimination. Early in my exploration of DSP, I was using an FPGA with a DAC that could run at 500 kHz sample rate. I wrote a monosynth with 4 oscilla ...
Topic: New to Lunetta with some questions
JovianPyx Replies: 37 Views: 19919	Posted: Tue Aug 18, 2020 6:47 am Subject: New to Lunetta with some questions Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
JovianPyx Replies: 37 Views: 19919	It is best to use one power supply voltage to power everything. With different voltages for different circuits, the outputs from the higher voltage unit can overdrive and even damage the inputs or ...
Topic: Virtual Analog Synthesizer
JovianPyx Replies: 72 Views: 48740	Posted: Thu Aug 13, 2020 5:16 pm Subject: Virtual Analog Synthesizer Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 72 Views: 48740	It seems to me you should be able to accomplish your goal. Optimization could also give you either more voices or more features.
Topic: Virtual Analog Synthesizer
JovianPyx Replies: 72 Views: 48740	Posted: Thu Aug 13, 2020 2:08 pm Subject: Virtual Analog Synthesizer Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 72 Views: 48740	Check https://os.mbed.com/platforms/ST-Nucleo-H743ZI2/ The H743ZI2 can operate up to 400 MHz, not 480 MHz. I've worked with this board. Currently, I'm working with someone else to develop what is ...
Topic: Help me find the music i like
JovianPyx Replies: 3 Views: 2691	Posted: Mon Aug 10, 2020 7:38 am Subject: Help me find the music i like Forum: Discussion » Introduce Yourself
JovianPyx Replies: 3 Views: 2691	I can't help directly, but I can offer my own personal observation. That is that it's difficult to choose music for another person even if you know them well. I don't fully understand why I like eac ...
Topic: The Garden
JovianPyx Replies: 792 Views: 319322	Posted: Sun Aug 09, 2020 8:45 pm Subject: The Garden Forum: Discussion » Schmooze
JovianPyx Replies: 792 Views: 319322	Interesting, I'll have to see if I can get the N P and K as 3 separate compounds. In my case, I could have used just N. What I have is heavier for N than P or K, but P and K measured as sufficient. ...
Topic: The Garden
JovianPyx Replies: 792 Views: 319322	Posted: Sun Aug 09, 2020 6:12 pm Subject: The Garden Forum: Discussion » Schmooze
JovianPyx Replies: 792 Views: 319322	What does it mean for a plant fertilizer to be "organic". I know that in USA we have laws that define exactly what that means for food products, but I'd not heard of it applied to fertilize ...
Topic: seq1 - A Practice Tool MIDI Sequencer for Linux
JovianPyx Replies: 2 Views: 3445	Posted: Sun Aug 09, 2020 3:13 pm Subject: seq1 - A Practice Tool MIDI Sequencer for Linux Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 2 Views: 3445	Here's another sample, just the sequenced parts, but I've added bass drum and snare in a simple thing to rock to on a guitar In this you can hear the random improvisation on the bass. The perc ...
Topic: seq1 - A Practice Tool MIDI Sequencer for Linux
JovianPyx Replies: 2 Views: 3445	Posted: Sun Aug 09, 2020 1:56 pm Subject: seq1 - A Practice Tool MIDI Sequencer for Linux Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 2 Views: 3445	Here's a snippet of a practice session. Obviously, I need a lot more, but you can hear also the bass and percussion (just a ride cymbal). The bass is a Karplus-Strong design that should eventually e ...
Topic: seq1 - A Practice Tool MIDI Sequencer for Linux
JovianPyx Replies: 2 Views: 3445	Posted: Sun Aug 09, 2020 12:50 pm Subject: seq1 - A Practice Tool MIDI Sequencer for Linux Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 2 Views: 3445	The name is tentatively 'seq1', if I find that already exists, I'll change it. Anyway, I've wanted a metronomic tool for practicing guitar and ukulele for a long time. For what I do, I just need a ...
Topic: The Garden
JovianPyx Replies: 792 Views: 319322	Posted: Sun Aug 09, 2020 11:47 am Subject: The Garden Forum: Discussion » Schmooze
JovianPyx Replies: 792 Views: 319322	Since I could not get pepper seeds to grow beyond one inch tall, I bought some already established pepper seedlings and planted them. 2 were planted in pots with old soil and one was planted in bra ...
Topic: Samplerate and Bitdepht of CV Generators
JovianPyx Replies: 8 Views: 8287	Posted: Wed Jul 22, 2020 2:58 pm Subject: Samplerate and Bitdepht of CV Generators Forum: DIY Hardware and Software » Arduino
JovianPyx Replies: 8 Views: 8287	I don't understand powering a DAC from an MPU data pin either. For one thing, the data pin could be noisy. And another pin for ground - more noise. A regulated voltage from the PSU and the real g ...
Topic: WASP vcf stripboard
JovianPyx Replies: 11 Views: 24124	Posted: Tue Jul 21, 2020 10:56 am Subject: WASP vcf stripboard Forum: DIY Hardware and Software » The layout factory
JovianPyx Replies: 11 Views: 24124	Hello..as per my knowledge with Wasp VCF, If the regulator is working right, there will be 5v on pin14 of the 4069. Note that both chips will work happily on 9v supply, so I'm puzzled as to why 5v reg ...
Topic: Tube VCA question/idea--low voltage plate triodes?
JovianPyx Replies: 1 Views: 3193	Posted: Sat Jul 18, 2020 9:06 am Subject: Tube VCA question/idea--low voltage plate triodes? Forum: DIY Hardware and Software » Ken Stone designs - CGS
JovianPyx Replies: 1 Views: 3193	One of my first electronics jobs was at MSA (Mine Safety Appliances). One of the many things they sold were electronic gas analyzers for various purposes. I serviced these devices. One of these was ...
Topic: The Garden
JovianPyx Replies: 792 Views: 319322	Posted: Sun Jun 28, 2020 9:07 am Subject: The Garden Forum: Discussion » Schmooze
JovianPyx Replies: 792 Views: 319322	Beautiful plants PHOBoS! I've finally gotten some success with mine. I couldn't get pepper seedlings to grow beyond on inch tall, so I bought some pre-started seedlings. Those are doing great. I ...
Topic: Question on the TR909 Low Tom schematic
JovianPyx Replies: 6 Views: 3879	Posted: Sat Jun 27, 2020 8:20 am Subject: Question on the TR909 Low Tom schematic Forum: DIY Hardware and Software » Developers' Corner
JovianPyx Replies: 6 Views: 3879	I can't be sure in this case, but there can be reasons for such an arrangement. For example, if there are power traces that go to the other side of the board and those traces are skinny, extra caps c ...
Topic: Large voltage drop in PSU
JovianPyx Replies: 22 Views: 9882	Posted: Tue Jun 23, 2020 7:47 pm Subject: Large voltage drop in PSU Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
JovianPyx Replies: 22 Views: 9882	I looked again at the scope traces. What I noticed is that it seems that under little to no load, there's no in-your-face ripple, but as you increased the load current, there began to appear more and ...
Topic: Large voltage drop in PSU
JovianPyx Replies: 22 Views: 9882	Posted: Tue Jun 23, 2020 7:10 pm Subject: Large voltage drop in PSU Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
JovianPyx Replies: 22 Views: 9882	That is definitely more droop than the datasheet specifies, so unless it's damaged, it wouldn't be the LM3xx IC at fault. PSUs need to transfer rather large amounts of current. To do that efficien ...