Mr Carlson's Lab

Curve Tracer's Function Explained.

This is an in-depth explanation of the op-amps function in this project. We look at the schematic, then I use test equipment to further clarify the curve tracers operation.

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External Digital Readout Parts List For Curve Tracer:

Hi Everyone!

I hope you enjoyed the last video just released on YouTube. If you haven't seen it, here is the link: https://youtu.be/yLr16NJ2Llg  Production time on that video was 2 Weeks.... (lots of late hours on that one.)

Here is the part...

Let's Build this Curve Tracer!

Click on the large black title (above this) to expand the post.

Here it is! A very simple, but extremely useful piece of test gear. In this video, we build the circuit together and test a few example components.

 Patreon NEW LIST of Videos: 2017-07-08 04:59:50 +0000 UTC View Post

In Circuit Curve Tracer, Component Tester Parts List:

To expand this post, click the large black title above.

This curve tracer/ signature tracer/ component tester, is very versatile. It's safe to test components right in their circuit board, supplying a maximum of only 1 mA. Great for testing semiconductors, all the way to relays! I'm working on the design (actually right...

Let's Make A Circuit Board!

Here is the circuit board for the last video, (Wien Bridge Oscillator.) In the attachments below, you will find a parts map, and the scaled layout. When it's built, share your results and pictures in the community section.

Patreon NEW LIST of Videos: 2017-06-13 14:49:32 +0000 UTC View Post

Build This Simple "Low Distortion" Signal Generator For Your Projects

Build a signal generator with better distortion specs than most on the market! It requires very few parts and is a great learning tool. Learn the Math, and some neat short cuts that will make you a pro in no time. See the attachments below for a Schematic and the Math "simplified." Follow along with your calculator, and you'l...

Let's Build A Simple Transistor Tester, Matcher , and Biasing Circuit.

Two simple, and very effective circuits for the design of audio amplifiers. Build these circuits and have a very accurate way to match, test, and bias both NPN and PNP small signal transistors, Germanium and Silicon alike. 

Please note:  Some of the resistors were not used in the parts li...

Next Build Parts List: Video is above this Post ^

This is a parts list for the next build, some want to build along with the video, so this provides the time to source the components.

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      &...

1.5 Volt Oscillator and Breadboard "Traps" Explained. Transistor Testing Made Easy.

This video explains the complexities of working with breadboards at higher frequencies. The 1.5 Volt oscillator's function is explained, with an interesting way of looking at transistors. As usual, lots of information here, "You may want to take down some notes."

Patreon NEW LIST of Videos: 2017-04-29 02:51:47 +0000 UTC View Post

Newest Spoiler: 2 Video's on the way! Click on this title to expand.

 Two video's are coming...... 

Next Patreon Video:      "IT'S UP!"   Above this post.

I will explain "in detail" how the 1.5 Volt Oscillator operates (last video.) I will also show the steps involved ...

Build This Simple 1.5 Volt Oscillator.

This very simple 5 component oscillator will operate from a 1.5 Volt source, and light a super bright white LED, bright enough to be used in a small flashlight. Then we modify the circuit and make an led glow right down to .25 Volts with a standard pair of silicon transistors. Build this circuit on your bread...

Understanding Transistors, FET's, and Using A Breadboard

Why Transistors and FET's get hot. Learn about prototyping on a breadboard and much more.

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Hey! A "Heads Up" for my Patrons.......

A new video will be up on YouTube this evening (Friday March 24) This was a request by many... (OK... I'm not spoiling it.)

Below this post! "Part 2"

The pictures in the last two video's look very similar. Lots of great information about total harmonic distortion (THD) diode ring detection, noise location in amplifiers, math calculations for open loop gain, closed loop gain, calculating global feedback in dB, amplifier bandwidth. See an old Tektronix 547 show...

MAAS 50 Audio Amplifier Redesign, understand feedback, bandwidth, and THD. PART 3

 Join Paul through the entire redesign process of this MAAS 50 amplifier. Learn a few math short cuts to determine amplifier gain, and calculate global feedback. See the affects of feedback verses no feedback, and discover how it (feedback) lowers total harmonic distortion (THD) and widens the amplifier bandwidth. Some h...

MAAS 50 Amplifier Schematic for Part 2

Here is the schematic we will be talking about in part 2, involving this MAAS 50 amplifier. Those of you that download this schematic now will have a head start in understanding it's function. I'll also explain the function "piece by piece" in part 2 for those of you that may have a difficult time with the schematic. I will a...

Early Release for Patrons! Unique Tube Amplifier Repair

This video is part 1 of 2. This video will be publicly released on youtube in a few days. The second video will be a part of this course ,and only released to Patrons, (You.)  Lots of neat information coming in the second part, the stuff you don't normally learn about.

Patreon NEW LIST of Videos: 2017-03-01 07:03:21 +0000 UTC View Post

List Of Videos: Link Count: 232

• Video 1: Thanks Everyone! Lets get started. https://www.patreon.com/posts/thanks-everyone-7821840

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• Video 2: 50's Switching Power Supply, and Ho...

  2017-02-26 14:14:00 +0000 UTC View Post

My Worst Troubleshooting Experience!

Here is a horrible little part that took weeks to track down. The unit would work fine for about a week, fail for only a split second, then run for a week again. The worst part about troubleshooting an intermittant is.... There is no problem to troubleshoot when it's not failing. Fun times! 

This is a short video s...

Power Supplies to Audio Amplifiers.

And all the signals in between.

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50's Switching Power Supply, and Honing Your Inner Circuit Simulator.

 A few notes: If you would like to expand this post, click the large black title above. If you would like to leave your comments on youtube instead, click the white title "in the video." These video's are "unlisted" and available only to you and other patrons, they will not show up in the youtube feed.

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THANKS EVERYONE, Let's get started!

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