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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LEAP#312 Matrix Firecracker
I was a bit dubious about the possibility of creating a decent firecracker animation on the 24x5 Matrix display. The additional PWM settings create another dimension, so the simulacrum is perhaps not so far off the mark. To light the firecracker, I want to use a real fire of course;-) As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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