Digital Storage Oscilloscope
Hardware- 3 Devlogs
- 12 Total hours
This is my Digital Storage Oscilloscope on a single PCB and powered entirely by USB-C.
Hi hi!
Great work! :D
Hello!
You are still missing the thumbnail render of what the actual project looks like (So in this case, it would be the oscilloscope with the screen on it, and if you have a case, add that as well)!
Hi hi!
This is a really awesome project! However, there are a few changes that need to be made:
1: Make a thumbnail render!
Make a thumbnail render that shows what the final product actually looks like.
2: Make some changes to the readme!
You have a really solid readme so far.. However, in order for this to be a high-standards readme, try to have a section that talks about each component of the project (PCB, Firmware, CAD). As of right now, 90% of your readme is just the PCB. Make sure to add as much detail into your firmware and CAD!
3: BOM issues
There are inconsistencies for the BOM. For example, you said that the price for the BNC-SMA-KJ-9C is $2.31, but the ext. price is $36.15. In addition, in a lot of places in the BOM, your quantities are like 50 and 100 pcs. You can go less, as you don't need 50 to 100 pcs of certain parts.
Possible incompatibility with the display:
Make sure that the exact display that is in the BOM is electrically and mechanically compatible with the PCB. The README specifies a 40-pin RGB LCD interface, while the BOM links an HDMI display and lists a 61-position FPC connector
Once these changes are made, we will take another look, and if everything is good, we will take another look! :D
Devlog #03
Finally the PCB is completely routed and i also mad the 3d model for my project. Now i need to upload everything on github and write a BOM
Devlog #02
I have done the final checks of the shematic and now it is all set to become a pcb! I did some changes in the meanwhile.
- In the first place I have added a 40 pin flat display connector and a 4 pin one for the touch
- I added loop stabilizing
- I fixed the anti-aliasing filter to bring the cut at 33MHz
I did some important changes regarding the power supply. Before I used 10V for some components but that tension have vould burned them! So i added a new label that brings 5V into the cricuit
Devlog #01
This is my brand new (and by far most complex) hardware project. This is a Digital Storage Oscilloscope on a single PCB and powered entirely by USB-C.
I have almost finished designing the schematic but it surely needs improvments!
Key Specifications
- Analog Bandwidth: 20 MHz (-3dB).
- Real-Time Sampling: 100 MS/s at 8 Bit
- Full Analog Front-End (AFE): Standard 1 MΩ // 30 pF BNC input with ESD diode clamps, high-Z FET input buffer (ADA4817), programmable gain amplifier for Volts/Div scaling (OPA820 + Mux), DC offset injection, and a 30 MHz Sallen-Key anti-aliasing filter.
- Hardware Capture Engine: A dedicated 100 MSPS pipeline that wirtes samples as fast as 10ns async SRAM.
- MCU & UI: An STM32H7 (480 MHz Cortex-M7) reads the captured data via an FMC bus, handling waveform math, rotary encoders, and rendering to a 7-inch touchscreen display.
- Clean Power Delivery: All dual low-noise analog rails (+10V / -10V) and digital rails (3.3V and 1.2V core) are generated on-board from a single 5V USB-C input.
Now I need to do some final checks on the shcematic and then straight to the PCB
