A venture in retrotronics

This is a breakout board for the TI TLC5947 IC, a constant-current LED driver supporting 24 channels, and 12-bit PWM control per channel. Unfortunately this powerful yet easy to drive IC is only available in high-density packages that are hard to solder without special equipment and skill. Even more so considering that the TSSOP package not only features a 0.65mm pitch but also requires an integrated heat sink underneath — this is what TI calls a DAP/PowerPAD Thermally Enhanced package. That means that there is a thermal pad at the bottom side of this HTSSOP package which needs to be connected (i.e. soldered) to a heat sink (i.e. two or more copper planes connected through thermal vias) integrated (i.e. designed) into the PCB.

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s2smodern

The pt1-ATmega1284-5V33V is a robust, fully featured ATmega1284 development board built on through-hole components. Its main feature is a fast-mode I2C interface that supports 5V and 3.3V devices at the same time. Both voltages are provided by two on-board regulators.

Apart from the two main connectors making the full range of MCU pins available, the board also features individual connectors for I2C at 5V and 3.3V, power at 5V and 3.3V, and ISP and UART. The latter two allow the board to be connected to a computer for programming and monitoring/debugging with minimum wiring and hassle. External power can be provided through the 5.5mm power jack, or directly from an external 5V source.

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s2smodern

 

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