upbeat gyro
Still early on this, I have a different eInk display on a dev board that will reduce the number of PCBs involved here so this is mostly a POC. Gutted a cheap voltmeter and am running it via PWM to move the needle in front of an eInk display to create an old analog meter style display
still estuary
Love this!! The hybrid display is suuuper cool.
obsidian swallow
Very nice! I have one of those meters lying around from a gutted tape recorder, and am always looking for a nice project for it. This looks like a great candidate! 😄
dense jackal
Great idea!!
full pollen
Nice idea to combine both. An analog Meter is best to view the relativ change of a value over time.
If you make it jump around between different values (degrees, percentages) it gets a bit pointless..
I would suggest to show some values on the scale, (eg. from 0 to 100%) and leaving the time to another area..
glossy hinge
What PWM you use?
I have 3 of this meters 3,3V meters and cant make tham move good.
Thay bob around the set value. 😦
Can you share the code?
@upbeat gyro
robust bramble
What PWM you use?
I have 3 of this meters 3,3V meters and cant make tham move g...
What frequency are you using? Maybe add a low pass filter on the output.
glossy hinge
I dont realy know. I see this project and remember my old days of testing this 🙂
I was tring to make a clock from 3 of this meters.
But cant make it stable.
upbeat gyro
nothing too fancy on the DAC side:
output:
- platform: ledc
pin: GPIO17
id: output_pwm
frequency: 19531Hz # 12 bit, 4096 steps
light:
- platform: monochromatic
output: output_pwm
id: light_pwm
name: "Analog Meter"
Why are you using a light?
glossy hinge
What should you use? 😄
robust bramble
Just use the output directly. What you have is going to be sending updates for the light to HA every time you change the display.
upbeat gyro
in my case, i was using HA to control the VU meter, so presenting a light was how the automation on the HA side got things done
robust bramble
oh, ok. Then I guess it makes sense in that case. 🙂
Why would you do that though? You still need the data locally to update the display.
upbeat gyro
was easy at the time? honestly, the whole project was me seeing something similar and saying hey i bet i can do that, so i did that, posted a pic, then haven't touched it since lol
turns out i was correct, with the help of esphome and fine people here, i can in fact do that!
glossy hinge
Ohhh i know wher was mi problem 😄
I am using the 5V Voltage meters not 3V>>
So i neded Logic Level shifter.
And that was giving me hard time 😄
robust bramble
Is it actually a volt meter or just the meter by itself?
robust bramble
You can probably adjust it by adding a resistor.
But this should go to a thread in #off-topic now if you're wanting to work on it. 🙂
glossy hinge
Ant the another thing that is magic 😄 Now i have it ON. And i copied your seting and the magic thing ist that 76% is 2.5V??
How? On 5V side of Logic Shifter.
Now i remember why i domed this project 😄
robust bramble
Are you using a light?
glossy hinge
I copied you config 😄
robust bramble
You need to disable the gamma correct.
robust bramble
No way 😄 That simple? 😄
That's a common source of confusion and another reason to not use light for something like this. 😉
glossy hinge
Yeeeh used just for fast test 🙂