Search found 61 matches

by flyboy71
Mon Nov 21, 2022 9:16 pm
Forum: Pro Audio Design
Topic: Texar Prism clone prototype Finished Version
Replies: 75
Views: 56331

Re: Texar Prism clone prototype Finished Version

Yeah the PICs are still at zero inventory but I did buy enough of them to build what I have left and some other parts that I knew would be difficult. I re-ran the BOM manager again and it looks like parts that weren't in stock a month or so ago are now available with only a hand full that I can prob...
by flyboy71
Fri Nov 18, 2022 8:01 am
Forum: Pro Audio Design
Topic: Texar Prism clone prototype Finished Version
Replies: 75
Views: 56331

Re: Texar Prism clone prototype Finished Version

Hello everyone! I'm still here lurking about the forum. I decided to pull down my website since the interest died off and it no longer made sense to pay the monthly fee but Im keeping the domain name to maybe use later if I have any other ideas to offer. I still have plenty of boards left but the pa...
by flyboy71
Fri Jul 15, 2022 11:13 am
Forum: Pro Audio Design
Topic: Discrete Op Amp clipping behavior
Replies: 6
Views: 1154

Re: Discrete Op Amp design

What you describe is phase reversal which occurs when the common mode voltage is exceeded. There are many newer enhanced versions of older opamps that the datasheet indicates as not having phase reversal. The TL072 datasheet is one example. You will definitely see this on a general purpose part such...
by flyboy71
Thu Mar 31, 2022 9:58 am
Forum: Pro Audio Design
Topic: Wet/dry Parallel Processor
Replies: 26
Views: 7670

Re: Wet/dry circuit

I'm coming in on the tail end of this but I'm harkening back to my compressor project where I took the ADC input of my PIC chip and used a lookup table to generate a log function for the PWM. This would get complicated though unless you added a DAC to the PIC plus programming it. I know I've used th...
by flyboy71
Fri Dec 31, 2021 10:30 am
Forum: Pro Audio Design
Topic: Texar Prism clone prototype Finished Version
Replies: 75
Views: 56331

Re: Texar Prism clone prototype Finished Version

Whew! Im glad I ordered when I did. On Monday there were 1400 in stock. I ordered 20 to have plenty and now look at it. I have watched this go from 9000 to 7000 to 3000 from the first time I offered my project. I think since the SMD version has been unobtainable since beginning of the year this has ...
by flyboy71
Thu Dec 30, 2021 6:13 pm
Forum: Pro Audio Design
Topic: Texar Prism clone prototype Finished Version
Replies: 75
Views: 56331

Re: Texar Prism clone prototype Finished Version

I had trouble sourcing the SMD caps I use on the display boards. There was only one recommended replacement to choose from. I'm not sure about any thru hole parts. That's another reason I stopped short of supplying assembled boards until this clears up a bit. The other part I see dwindling fast are ...
by flyboy71
Thu Dec 30, 2021 11:30 am
Forum: Pro Audio Design
Topic: Texar Prism clone prototype Finished Version
Replies: 75
Views: 56331

Re: Texar Prism clone prototype Finished Version

So I have made a one time buy on the parts needed for the remaining board sets. I have 4 sets left with 2 in reserve for potential buyers. I was surprised at the hoops needed to jump through get the parts but I want to be able to deliver what I have left. I will order more bare boards when the parts...
by flyboy71
Mon Nov 01, 2021 6:08 pm
Forum: Test, Measurement and Repair
Topic: Fluke 8050A Display Upgrade
Replies: 17
Views: 4920

Re: Fluke 8050A Display Upgrade

Close enough for government work! Speaking of...... way back in the early 90s a company I worked for used those meters for testing on a government project. Whatever we were measuring had to be within a gnats behind tight spec so they literally stacked and paralleled those until one of them read the ...
by flyboy71
Sun Oct 24, 2021 1:38 pm
Forum: Test, Measurement and Repair
Topic: Fluke 8050A Display Upgrade
Replies: 17
Views: 4920

Re: Fluke 8050A Display Upgrade

I forgot about the -5V supply. That complicates it a bit. I have used level translators before to handle comms to a device in some weird test system I had to design. I'm thinking it was just a transistor. Cant remember which circuit but here are some ideas. https://www.maximintegrated.com/en/design/...