Nik VK4PLN has been working on a simple “open source” Raduino replacement board. He has now provided photos of both sides of the board.
It will use the Adafruit Clock board. All devices will, therefore, run at 5v. inouts and dimensions are similar to the original so it can be used as a direct drop-in replacement, or it can be modified for i2c display and other GPIO mods.
Nik is hoping it will work out cheap (50c a board, $3 nano, $8 Si5153 board plus a 7805 regulator and a few other bits and pieces). He plans for the board to accept either Surface Mount Devices or Through Hole devices, particuarly for the capacitors and resistors…
It is hoped that this would be a cheap easy build for a Raduino replacement. An initial assessment of costs (ex Ebay.com) is as follows:
VK4PLN RadinoI2C board : $8
LCD + Backpack : $3
Si5351 : $8
+bits : $2
= $25, not too bad.