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# Professor Patty Coleman on The Biography of Elon Musk

Folks, It has been a very long time since we checked in on Patty. Let's see how she is doing......

# Second Post on Thinking Metric

Folks, Continuing our post on thinking metric: I am 5 feet 10 inches tall or 70 inches. There are 2.54 centimeters per inch, so 2 times 70 = 140, then...

# Do We in the US "Think Metric?"

Folks, here are some tips and tricks for an easy conversion of celcius to farenheit and vice versa......

# Using ANOVA to Compare Three or More Solder Pastes for a Metric-Like Transfer Efficiency

An Interview with Professor Patty Coleman....

# Stencil Printing Response to Pause

Folks, Good friends Phil Zarrow and Jim Hall did an episode on their world famous “podcast” “Boardtalk” on the importance of r...

# Join Me at SMTAI 2023

Folks, This year SMTAI is in Minneapolis from October 9 to October 12. I will be giving a paper on hotbar soldering in the morning on Thursday October...

# Spreadsheet to Turn Solder Wire Mass to Length and Vice Versa

Folks, Digikey colleague Aaron Rollens developed the equation to convert the mass on a spool of solder wire into its length. I also developed the equa...

# Technique to Estimate the Upper Confidence Limit on Failure Rates

Folks, Let’s assume you would like to estimate the upper confidence limit of a failure rate. As an example, assume you have 21 samples of 1000 t...

# Acceleration Factors in Life Testing of Electronics

Folks, You are the project manager for a PCB that must function in an environment from -10 to 80 C. The PCB will experience one thermal cycle per day ...

# Excel Spreadsheet to Calculate and Graph Intermetallic Growth in Solder Joints

Folks, In my last post, I discussed the concern for copper-tin intermetallic (IMC) growth in solder joints at high service temperatures. Since then, I...

# Concern for Intermetallic Thickness Growth in SAC Solder Joints in Harsh Service Environments

Folks, The service temperature for electronics in a modern automobile can be higher than 125C. These high temperatures raise the concern of copper-tin...

# AI Will Not Physically Destroy Civilization

Folks, You have undoubtedly heard in the news that some predict AI will destroy civilization. Even the “Godfather” of AI, Geoffrey Hinton ...