Search found 4 matches
- Wed Apr 20, 2016 12:42 am
- Forum: DSO 068
- Topic: 068 works ok but displays noise on screen.
- Replies: 9
- Views: 13606
Re: 068 works ok but displays noise on screen.
Hi! Yes i had forgot, but some time after finishing the building, the chip on BOB5 fall off, so i soldered it back and since i never soldered smd components, i may have damage it, that strange though cause it shows 5v at the input and -5V at the output, so it seems to work fine. BOB4 has 4.4V at the...
- Sun Apr 10, 2016 12:22 am
- Forum: DSO 068
- Topic: 068 works ok but displays noise on screen.
- Replies: 9
- Views: 13606
Re: 068 works ok but displays noise on screen.
Hi, I cheked L1/L4/C27/C29 and they seems good, when the oscilloscope is on gnd i still get noise on the screen. I don't know where i should look now. I took better photos, here battery powered http://i.imgur.com/PvaYlXY.jpg and here with usb power http://i.imgur.com/PsJKy4c.jpg Test signal is 1000Hz.
- Mon Feb 22, 2016 11:10 pm
- Forum: DSO 068
- Topic: 068 works ok but displays noise on screen.
- Replies: 9
- Views: 13606
Re: 068 works ok but displays noise on screen.
This is when I connect the probe to the test output:
Here with a 3.7V battery
And here powered by USB
Here with a 3.7V battery
And here powered by USB
- Sun Feb 21, 2016 12:25 am
- Forum: DSO 068
- Topic: 068 works ok but displays noise on screen.
- Replies: 9
- Views: 13606
Re: 068 works ok but displays noise on screen.
Hi, I experience the same problem. When powered by USB I got a lot of noise, i can see the test waveform but it's very noisy. And when powered by 3.7V battery, I still got noise but less than with USB. Since i don't have another oscilloscope to test the analog power supply, it's complicated to debug...