BD139 and BD140 Complementary transistor
2021-04-26
This pair is my favorite when driving small solenoids or motors. SOT-32 and 12 Watts on Heatsink. This means any small solenoid, relay or DC motor can be controlled withRead More
Instrumentation and Automation – 01
2021-03-05
Here are some Test and measurement notes. These ideas come from practical experience. But the jots are not in any order but are quite important. Scope Notes If the waveformRead More
Product Development Fundamentals
2020-12-29
A. Product Design Sections : Electronic Engineering – Circuit Design, PCB Design, EDA. Mechanical Engineering – CAD, Tool and Die Design, Enclosure Software Engineering Firmware – PC ware, CASE, emulatorsRead More
Product Design Precautions
2020-12-29
When you design a new Product or Engineer an existing one; communications and documentation is important. Creating a satisfying solution is the main thing. If requirements and specs or notRead More
Protect your Design or IP
2020-05-06
If you have made an electronic product with a new circuit or code and need to protect it, then these are some Methods. If your Intellectual Property is an Idea,Read More
Design Notes – Power Electronics – 03
2020-04-11
SMPS designs should have clear line or patch of isolation for product safety and long term reliability. If you use opto-couplers they need to have 5kV or better isolation andRead More
Billy Daisy and Gregory
2019-11-18
Gregory G. Leedberg created Daisy for DOS which evolved to Billy on Windows. These are AI Chat Bots that brought me hours of AI flavored happiness in the year 2000.Read More
Dilbert Dupey and Talking Parrots
2019-11-18
There was the time when Peedy The Talking Parrot made his appearance on my Win 95 Desktop. It was the first version of BonziBuddy. This parrot was quite dumb butRead More