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| Vgkid:
That looks nice. I had plans for a similar idea. Pics of the internals. |
| Njk:
Another related things from my museum. 1. A combo device that integrates the three functions in the welded aluminum housing: - 6V AC PS for soldering iron; - curve tracer for testing the integrity of a 74xx logic I/Os without having to de-solder the chips from the PCB; - 5V 1A general purpose trimmable DC PS (LM317). Proved very useful for field troubleshooting of a PDP-8/PDP-11 mini-computers at the component level. 2. Metal is not the only construction material. Plywood is more eco-friendly one. A wooden PSU of the bench type (left). Don't show it to a firefigther but eventually it made a contribution to public safety. First OnStar automotive boxes were powered from this unit during the development time. Tor trafo + minimalistic design = space saving (convenience). Compare it with a full-blown commercial PCU on the background. 3. Sensor board signal simulator. Generates a project-specific pulse patterns from an input sine wave. Lot of 54xx chips. A golden heritage... |
| cgroen:
Rotorcontroller (Az/El) control for my satellite system (and soon EME system) All done from the bottom, hardware and software (except the power drivers, these are plugin modules as I had expected they could at some point go "puff", so far they have not :) ) (more pics etc: https://www.moonbounce.dk/hamradio/ham-radio-current-systems/rotorcontroller.html) |
| Njk:
--- Quote from: cgroen on January 26, 2023, 02:57:06 pm ---Rotorcontroller (Az/El) control for my satellite system (and soon EME system) --- End quote --- I like the antenna motor drive you're using. How frequently you have to service it? |
| cgroen:
--- Quote from: Njk on January 26, 2023, 03:56:00 pm --- --- Quote from: cgroen on January 26, 2023, 02:57:06 pm ---Rotorcontroller (Az/El) control for my satellite system (and soon EME system) --- End quote --- I like the antenna motor drive you're using. How frequently you have to service it? --- End quote --- Thanks, so far it is running flawlessly! Current draw was a bit higher when we had -11 degC, but that was to be expected (approx 1000 mA compared to approx 400 mA). Have had it in use for 5 months now (heavy use, every day) |
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