Disclaimer - I am new to everything in the hardware world. I've been a software engineer for 12 years and have maybe 1 week of tinkering behind me.
I would like to build a fun/retro/useful set of analog indicator gauges that report on real-life events. I can handle network stuff and I will work my way through the microcontroller part but I cannot find suitable gauges. Everything I can find is way over the voltages I am dealing with. The easiest path I can imagine to getting unblocked would be some way to linearly (or at least predictably) map the approximately 0-5vdc range onto the 0-15vdc range so I can use readily available 0-15vdc panel voltmeters as my gauges.
The ways that seem to be possible given my extremely limited exposure:
1. Some simple transformer. I have no idea what the curves look like or if you can get anywhere near linear.
2. Some op-amp setup. I am way out of my league here. I could build it if I had a schematic but even the surrounding nomenclature is intimidating right now.
3. Some simpler transistor setup.
I would love to know if a secondary source of power would be necessary (my op amp reading seems to say they generally require + and - sources at a higher range) and other concerns like that. Alternately perhaps there is some ic that I could buy that does what I need without reinventing the wheel?
Many thanks, I suspect I will be a regular reader of this forum as I build my knowledge.
I would like to build a fun/retro/useful set of analog indicator gauges that report on real-life events. I can handle network stuff and I will work my way through the microcontroller part but I cannot find suitable gauges. Everything I can find is way over the voltages I am dealing with. The easiest path I can imagine to getting unblocked would be some way to linearly (or at least predictably) map the approximately 0-5vdc range onto the 0-15vdc range so I can use readily available 0-15vdc panel voltmeters as my gauges.
The ways that seem to be possible given my extremely limited exposure:
1. Some simple transformer. I have no idea what the curves look like or if you can get anywhere near linear.
2. Some op-amp setup. I am way out of my league here. I could build it if I had a schematic but even the surrounding nomenclature is intimidating right now.
3. Some simpler transistor setup.
I would love to know if a secondary source of power would be necessary (my op amp reading seems to say they generally require + and - sources at a higher range) and other concerns like that. Alternately perhaps there is some ic that I could buy that does what I need without reinventing the wheel?
Many thanks, I suspect I will be a regular reader of this forum as I build my knowledge.