LEAP#316 The Boldport QSOP Breakout
The QSOPBreakout was a special (read: beautiful!) board produced for the Boldport Club to help members
practice QSOP-24 soldering techniques for the Touchy project.
Firstly, I’m using this project to collate my notes on solder technique.
And secondly, perhaps there is something useful I can do with the QSOPBreakout board after all .. other than use it as a breakout board of course. And it turns out there is .. see the SolarPendulum!
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#315 MT3608 Variable Boost Converter
The MT3608 (also known as B628) is a very efficient boost converter that can deliver up to 24V at 4A.
It requires only 6 external passive components, and is readily available as a complete module for as little as $0.40.
For this test, I built the standard variable converter circuit from scratch and evaluated its performance.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#314 AT28C EEPROM Programmer with Port Expander
The AT28C16 is an old-school 2k x 8-bit parallel EEPROM. Since it has parallel addressing and data lines, it opens a whole range of possibilities with discrete logic circuits (i.e. no SPI or I²C in sight).
I was inspired to explore more by Ben Eater’s use of EEPROMs for his 8-bit computer build.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#313 MCP23S17 Port Expander
The Microchip MCP23S17 is a 16-bit port expender that can be controlled for example from an Arduino over SPI (MCP23017 is the I²C variant). It supports digital input and output on all pins, and interrupts can be configured if required. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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