For the ESP 32 frontpanel i ordered some potentiometer from china. After they arrived, i am very disappointed with the quality. In the following Post i wanna show you the disadvantages of some to cheap potentiometer knob, so that you don`t order the wrong potentiometer knobs.
The first order of potentiometer knobs:
In the following picture you can see my first order of 19×19 mm potentiometer knobs.
In one of the two potentiometer knob the infill loose the contact with the potentiometer shell. Inside the shell you can see a little bit rust on the shell wall. The shell consists of aluminum and the infill is plastic.
I mounted the not damaged one on a potentiometer. The concentricity of the knob is very bad. I think the plastic infill is not mounted in the middle of the potentiometer knob or it is tilted.
I am not happy with these potentiometer knobs.
After this i orded new potentiometer knobs from china, but i asked the seller if the potentiometer is fully cnc drilled.
The second order of potentiometer knobs:
In the following picture you can see my second order of 20×20 mm potentiometer knobs.
They looks very nice with no faults in the finish. They are fully cnc drilled and have a grub screw. They fitt perfect on an alps potentiometer and have a good concentricity.
The potentiometer knobs of the second order costs ~3$ each and the one from the first order costs ~0.9$ each. I would not recommended to buy the potentiometer knobs from the first order. The potentiometer knobs of the second order are a way better and still worth the price.
Other posts about audio:
The 3D printed holder for the ESP 32 is finished and needs a good looking frontpanel.
For the ESP 32 frontpanel i ordered some potentiometer from china. After they arrived, i am very disappointed with the quality. In the following Post i wanna show you the disadvantages of some to chea…
The PCB for the ESP32 frontplate is done and works. Now its time to build a enclosure for it.
For a time i build the iniversal audio amplifier with a PT2033 which can be programmed over I²C. Now its time to make a frontpanel to control this amplifier
Every speaker builder now the moment when you have an idea for your own customized speaker and you are searching for an amplifier which fits the needs. Most of the chinese Amplifiers has a horrible ba…