Don’t Trust Connectors, Solder, or Wires (EE Tip #138)

Using the wrong pinout for a connector is a common error, especially on RS-232 ports where it’s approximately 50% probable that you’ll have the wrong RX/TX mapping. Swapping the rows of a connector (as you see here) is also quite common.

Engineer Robert Lacoste is one of our go-to resources for engineering tips and tricks. When we asked him for a few bits of general engineering advice, he responded with a list of more than 20 invaluable electrical engineering-related insights. One … Continue reading

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Test Under Real Conditions (EE Tip #137)

Mark Csele's complete portable accelerometer design, which he presented in Circuit Cellar 266.  with the serial download adapter. The adapter is installed only when downloading data to a PC and mates with an eight pin connector on the PCB. The rear of the unit features three powerful
rare-earth magnets that enable it to be attached to a vehicle.

The world’s best engineers have one thing in common: they’re always learning from their mistakes. We asked Niagara College professor and long-time contributor Mark Csele about his biggest engineering-related mistake. He responded with the following interesting insight about testing under real conditions. … Continue reading

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Specs & Code Matter (EE Tip #136)

MCU

No matter how many engineering hours you’ve logged over the years, it’s always a good idea to keep in mind that properly focusing on specs and code can make or break a project. In 2013, Aubrey Kagan—an experienced engineer and … Continue reading

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One-Wire RS-232 Half Duplex (EE Tip #135)

Grun2-HalfDup

Traditional RS-232 communication needs one transmit line (TXD or TX), one receive line (RXD or RX), and a Ground return line. The setup allows a full-duplex communication. However, many applications use only half-duplex transmissions, as protocols often rely on a … Continue reading

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Low-Drop Series Regulator Using a TL431 (EE Tip #134)

EL2009-Kruger-SeriesReg

You likely have a stash of 12-V lead acid batteries (such as the sealed gel cell type) in your lab or circuit cellar. Below is a handy tip from Germany-based Lars Krüger for a simple way to charge them. A … Continue reading

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