<p>If application requirements don't allow you to use the Feather board from Adafruit, you can also build custom boards around the available NRF52 modules.</p>
<p>If application requirements don't allow you to use the Feather board from Adafruit, you can also build custom boards around the available NRF52 modules.</p>
<p>The Adafruit board uses the <a href="http://www.raytac.com/download/MDBT42/MDBT42Q%20spec-Version%20C.pdf">Raytac MDBT42Q</a>, available from Digikey (PN 1597-1434-ND) for $14.</p>
<p>The Adafruit board uses the <a href="http://www.raytac.com/download/MDBT42/MDBT42Q%20spec-Version%20C.pdf">Raytac MDBT42Q</a>, available from Digikey (PN 1597-1434-ND) for $14.</p>
<p>Fanstel also makes a variety of modules with the NRF52832 as well as the NRF52840 (with USB 2.0 support). The <a href="http://www.fanstel.com/bt832-1/">BC-832</a> is a very small module (7.8mm x 8.8mm) available for $7.60 in quantity 10. The <a href="http://www.fanstel.com/bt832-1-1/">BT-832</a> is slightly larger, but comes in a variety ranges and sells for just $5 in quantity 10.</p>
<p>Fanstel also makes a variety of modules with the NRF52832 as well as the NRF52840 (with USB 2.0 support). The <a href="http://www.fanstel.com/bt832-1/">BC-832</a> is a very small module (7.8mm x 8.8mm) available for $7.60 in quantity 10. The <a href="http://www.fanstel.com/bt832-1-1/">BT-832</a> is slightly larger, but comes in a variety ranges and sells for just $5 in quantity 10.</p>
<p>Below are two custom boards, one using the Raytac module and one using the Fanstel BC832 module. They are designed to use a serial DFU bootloader for programming with a standard FTDI cable.</p>
<p>Below is a custom board using the Fanstel BC832 module. It is just 23mm x 18mm, and is designed to use a serial DFU bootloader for programming with a standard FTDI cable.</p>
