You might think that CD players and DVD players have had their run, but as it turns out, they are absolute goldmines for DIY projects. Pop one open and you'll find stepper motors, laser assemblies, ...
Frank Hertel of Hertel Engineering says that if configured properly, many older Denon CD players could be used as backup audio at a transmitter site.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results