- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello,
I am trying a Driven-Shield with a handmade sensor with CSD.
0.01uF is implemented in the shield tank.
If I touch the sensor and release my finger suddenly, a spike will occur in the sensor signal.
What are the possible causes?
Best regards,
Yocchi
Solved! Go to Solution.
- Labels:
-
PSoC 4 MCU
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Yocchi san,
Can you share the snapshot of the sensor layout that you are currently testing?
Also, is this device battery operated or powered using mains? If it is powered using wall-power then the reason for this could be finger injected noise.
Also, are there any noisy signals in the design such as a motor or relay?
Note that the resolution here is simple and using a median firmware filter will eliminate this spike noise.
Best regards,
Hari
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Yocchi san,
Can you share the snapshot of the sensor layout that you are currently testing?
Also, is this device battery operated or powered using mains? If it is powered using wall-power then the reason for this could be finger injected noise.
Also, are there any noisy signals in the design such as a motor or relay?
Note that the resolution here is simple and using a median firmware filter will eliminate this spike noise.
Best regards,
Hari
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Hari-san,
Thank you very much for your help.
I enabled "Enable median filter(3-sample)".
The spike noise was gone.
> Can you share the snapshot of the sensor layout that you are currently testing?
See the snap below.
> Also, is this device battery operated or powered using mains? If it is powered using wall-power then > the reason for this could be finger injected noise.
It is a stable power source and not a battery.
> Also, are there any noisy signals in the design such as a motor or relay?
There is none.
Best regards,
Yocchi