Author Archives: Elexhere

Tucoplexing: A New Charliplex for Buttons and Switches

Figuring out the maximum number of peripherals which can be sensed or controlled with a minimum number of IOs is a classic optimization trap with a lot of viable solutions. The easiest might be something like an i2c IO expander, which would give you N outputs for 4 wires (SDA, SCL, Power, Ground).

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Easy Resistor Assortment Organization With Index Cards

Resistor assortments are often packed as strips of “tape mounted” resistors. The resistors can be easily organized by stapling the “taped resistor strips” to index cards. Resistor index cards can be sorted and stored in standard index file boxes.

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LCD panel + FPGA with an HDMI sink = External Display

Continuing from where I left off in Driving a Laptop LCD using an FPGA, I moved the ‘TMDS to LVDS converter board’ to perf board, and soldered the differential pairs from the LCD panel onto it. This setup was more stable, since there weren’t any loose wires like when I used the breadboard.

from Pocket
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