Repurpose an amp

About ten years ago I built an amplifier for my Kia Rio. I noticed it came with speakers even though I didn’t buy a model with a radio. My amp was a simple circuit that came pre-assembled, required 12 volts and took the signal from my iPod and feed it to the speakers with 22 watts of power.

About two years ago I got rid of that car. But I kept the amp. Today in my new house I am using that amp to power my computer speakers. I am using a pair of Optimus Pro 74V (26-2048). They sound great and can get quite loud with my little amp.

When I first assembled the amp for home use I connected a 12 volt wall wart power suppily (273-1652D) directly to the circuit. But there was a 60hz hum. I though the DC power coming from the wall wart would be very clean, but I was wrong. I then feed the power thru the noise reducer I used while it was powered in the car. It took care of the noise very well.


“Playboy does hereby bestow this award upon Charles August Lindner III For his lifetime subscription to Playboy Magazine and his never-ending pursuit of life’s pleasures. May he forever remain a connoisseur of beautiful women…and may he retain his lust for the good life for the rest of his years. From one Playboy to Another, Hugh M. Hefner”

Early in the 1960s my father invested $2000 with Hugh Hefner, in exchange he got a lifetime subscription to the Playboy Magazine and this plaque. He spent this money fresh out of college. Before he died I asked him why he did it. He said he could never justified it then or now, but did it anyway. He did say he never regretted the decision.

Learning to fly

My brother just called. He tells me he is teaching his 6 year old daughter to fly. He wanted me to to tell her the technique. I said that flying was easy, you just have to throw yourself at the ground and miss.

So now my brother turns back to my niece and says, “He said the exact same thing I did, now all you have to do is practice.” She giggled.

It was a nice moment. Thank you Douglas Adams.


I’ve started to write code again. Since January I’ve been in one of my non-programming moods. Last December my wife and I had one of the best times together in our marriage, but it quickly devolved into our worst. I was feeling depressed and lost interest in most everything.

But recently I started watching the WWDC videos. I got the urge to rewrite my Blocks program. With Blocks I wanted to experiment with the manipulation data as expressed as named blocks. After working on it for a while I hit the stumbling block of not begining with an abstraction deep enough.

With Streams, I started over. I am starting with digital signal processing (another interest of mine). In the screen shot below you’ll see an example on converting audio data into bytes the way the Color Computer does when reading a tape file.

Streams Screen Shot from August 10, 2011

Coordinated CoCo Conference #3

It is time again for the Coordinated CoCo Conference!

I’d really like to thank Aaron Wolfe who donates the bandwidth to run the conference: Thank-you!

Any our special guest was Marty Goodman, we interview him for the whole hour. Here is a link to the mp3.

Coordinated CoCo Conference #2

Me and about 10 of my closest friends conducted Coordinated CoCo Conference #2 on December 1st. We had a good talk about Steve Bjork’s floppy disk controller he is working on. Plus many other topics. Here is a link to the mp3.
I’d like to thank Aaron Wolfe for hosting the Skype call and helping organize the event.

Coordinated CoCo Conference #1

In late October of 2010 Aaron Wolfe, Todd Wallace and I decided to try to hold a monthly Color Computer Conference in the internet. We tested TalkShoe and Mumble as platforms to use, but decided to use Skype for the first conference.
We announced the first call would help held Tuesday, November 2, 2010.
I am very pleased with how the first conference turned out. I am posting the audio as an attachment to this post. Please enjoy: Coordinated CoCo Conference #1.mp3.
The next conference will be held early in December.


15 Year Old Daughter: “What’s wrong with me dating an 18 year old?”

Me: “Remember when I was teaching you how to drive? Before you pressed the break for the first time, I said, ‘Now press the break pedal gently.’ And the car immediately came to a jarring halt. And you asked, ‘How come you didn’t warn me that would happen?’ And I said, ‘There is no way I could have warned you what kind of pressure was needed to properly stop a car going 10 miles per hour. It’s something you have to experience yourself.’

15 Year Old Daughter: “Yeah.”

Me: “That’s what it is going to feel like years from now when you look back at dating an 18 year old”.