Surface mount Power Module for Texas Instruments LM317 in SOT-223. The traces of this board do not allow for more than 730mA current (10mil width, 2oz Copper) on both input and output.

Tested 2019, February 23rd

• R1, R2 are 603 package style.
• C1 is Panasonic S (VS) Series package size E.

Components for up to 3 boards at Digikey enough for either 3.3V or 5.3V. Digikey will display a submit form that states an error, just submit again and the components will be added to a new list.

I intended this board for use with a 9 to 12V supply and Right-Angle male pin headers so it could be used in a breadboard without taking up much room. Use any LM317 resistor calclator to select values of R1 and R2.

Hall Latch, 3.5V to 24V, Melexis US1881

Two of these will be able to make a quadrature encoder with North and South facing magnets. The US1881, us1881-datasheet-melexis.pdf, is a latching device requiring the opposite pole to unlatch/latch. R1 (SMT 1206) is 10K and must be rated for the voltage you use. These do work at 3.3 volts.