Preamp and power supply assembled and tested for functionality.
A photo below shows the temporary functional mockup.
A box for them is on order and arrives early October.
I had hoped to improve my laptop video viewing experience with the addition of a couple og HP computer speakers. The wiring of the speakers has proved to be a nuisance. They don't fit in to the overall system. They would be great if I had a desktop in a fixed and permanent position, but I move my laptop around and don't want to haul the speakers around too. I dumped them. Maybe a couple of bluetooth speakers. The wifi headphones turned out to be dicey. I got my money back from the eBay seller. I can run the phones once I remove the circuitboard from the pplastic housing. Then recharging batteries becomes a nuisance. Dumping the speakers and, provisionally, the headphones. Bluetooth is probably the way to go.
I've updated my home network. All the drives, niine in all, are shared over the home network. This will allow me to sit on my couch and edit videos without having to move the video file around from drive to drive. I can also run the media center laptop and play movies on theat computer's screen, from the couch. In order to set up sharing on the Microsoft Windows based network, several steps have to be followed. Go into the Network and Sharing Center in the Control Panel. On the left side go into Media streaming options. Choose 'Local Network' if your drives appear in the drop-down list, 'All Networks' if they're there there. Choose 'Allow All'. Go back Go into 'Advanced Sharing Settings'. I set everything to on except 'Password Protected Sharing'. The encryption method is trivial if you're offliine most of the time. If your network is on 24/7, the 128-bit encryption is recommended. Right-click on each drive and setup 'Sharin...
The preamp and SPICE simulations I've assembled and tested the preamp circuit board. There have been a couple of problems. I missed one capacitor but discovered the omission and soldered the cap in. The circuit still doesn't function correctly. The left channel is distorted. The board is fragile and cannot be soldered multiple times. I downloaded and installed a simulation program. After I built the circuit in the simulator, I ran some simulations placing short circuits in assorted positions. I finally discovered one that agrees with my predictions on the source of the problem. The process of using simulation software to replace hardware modifications saved a lot of time and wear and tear on the circuit board. The software required a learning curve but the results are worth the effort. The simulator I used was LTSpice, manufactured by Analog Devices.
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