• 10 dec 2017: forum version update. In case of issues use this topic.
  • 30 nov 2017: pilight moved servers. In case of issues use this topic.
Hello There, Guest! Login Register

low pass filter
I want to make the low pass filter in referring me to the wiki. I see that the inputs and outputs of the ATtiny are connected to GPIO of raspberry through resistors 1 Kohm . Why not use level converters 3.3v <-> 5V GPIO to protect and apply the correct levels on ATtiny ?
thank you in advance for your answers
Best regards
Because it works fine and safe the way we documented it.
I agree that it works, but I think it is not safe and not the correct way to convert levels. Running the ATTiny on 3V3 is the best solution I think.
@curlymo didn't you report problems running the ATTiny at 3V3?
According to the datasheet it should run down to 1V8 (if I remember correctly)
Yes, running it on lower voltages can make the tiny less accurate frequency wise. We are running it on it's top frequency. 5v with resistors is safe.

Possibly Related Threads...
Thread Author Replies Views Last Post
  Bandpass filter problem mayonezo 15 6,030 10-26-2020, 09:05 PM
Last Post: Michelebup
Rainbow Lowpass filter - how DOES it work? DE8MSH 16 7,452 04-17-2020, 10:13 PM
Last Post: curlymo
Question Passive Component Band-pass filter ripper121 8 3,560 12-16-2017, 01:38 AM
Last Post: wo_rasp
  Filter kit in 315 receiver? ceandre 1 1,862 04-14-2017, 10:10 PM
Last Post: wo_rasp
  Low Pass Filter and Receiver in Series? re-post Gustavo Woltmann 1 2,071 03-08-2017, 05:25 PM
Last Post: pilino1234
  Filter settings in config.json Saiyato 100 44,130 02-22-2017, 08:24 AM
Last Post: wo_rasp
  Low Pass Filter and Receiver in Series? Hauke 3 3,723 08-30-2016, 08:25 AM
Last Post: wo_rasp
  New filter version curlymo 0 2,046 04-02-2016, 08:05 AM
Last Post: curlymo
  Band-pass filter parts curlymo 60 74,700 01-08-2016, 12:23 AM
Last Post: gneandr
  Low-pass Filter wiring hazzard 4 3,861 11-15-2015, 08:35 AM
Last Post: woutput

Forum Jump:

Browsing: 1 Guest(s)