2 layers20.3 × 67.3 mm
SmartWatchRedux E
JayesonLS/SmartWatchRedux
Modern replacements for the DS1216 SmartWatch variants
6 parts4
2 layers20.3 × 69.9 mm
SmartWatchRedux E SMT
JayesonLS/SmartWatchRedux4Modern replacements for the DS1216 SmartWatch variants
- Size
- 20.3 × 69.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 6
- Nets
- 33
- Pads
- 78
- Tracks, vias
- 107, 16
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 2 Apr 2021
- Updated
- 4 Nov 2023
Overview
SmartWatchRedux E SMT is an open-source printed circuit board by JayesonLS, from the JayesonLS/SmartWatchRedux repository on GitHub. It is a 2-layer board of 20.3 × 69.9 mm with 6 parts on 33 nets, routed with 107 tracks and 16 vias.
It is built around the DS1315-5+ and CR2032. Its parts include 2 ICs, 1 capacitor, 1 connector and 1 crystal. It belongs with the wearables boards of this library.
Main components
2README
README.mdSmartWatch Redux
Modern replacements for the DS1216 SmartWatch variants.
SmartWatchRedux-E
Status: Version 1.0 built, tested and working. Version 1.1 (minor changes) untested.
A replacement for the DS1216-E. This SmartWatch is for use on a BIOS or exapansion ROM socket. It is typically placed in between an existing BIOS ROM and its socket.
This clock is compatible with Y2K and current dates when used with this software availalbe here: https://www.dropbox.com/s/kctqpwzjxgymfz9/smwy2k.zip?dl=0 or here: ftp://ftp.oldskool.org/pub/tvdog/tandy1000/utilities/smwy2k.zip
ATD-20-Redux
Status: Untested.
A replacement for the ATD-20 clock. This is used in ATD exansion boards for the Tandy 1000 computers such as the T512CLK-A1. It is believed that the ATD-20 is, or is compatible with, the DS1216-B/C SmartWatch. However, the ATD-20 does not allow, nor require, a BIOS rom to be fitted to the top of the module.
A DS1216-C has been tested in a T512CLK-A1 and works fine. If purchasing an original DS1216-C today, it may be necessary to retrofit a battery replacement. Google "DS1216 battery replacement".
Software for the ATD-20 (or DS1216-C) located in a T512CLK-A1 is available from here: http://www.minuszerodegrees.net/rtc/rtc.htm . It seems to work correctly with current dates.
Parts
6More from JayesonLS/SmartWatchRedux
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Questions
How big is the SmartWatchRedux E SMT PCB?
It measures 20.3 × 69.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SmartWatchRedux E SMT use?
6 parts, built around the DS1315-5+ and CR2032. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the SmartWatchRedux E SMT KiCad files?
From the JayesonLS/SmartWatchRedux repository on GitHub, at the commit this page was made from: the board is SmartWatchRedux-E - SMT/SmartWatchRedux-E-SMT.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the SmartWatchRedux E SMT design in my own project?
Its repository states no licence, so its author keeps all rights: ask JayesonLS before reusing the design.