A device that draws on an oscilloscope.
Drawing on analog oscilloscope is almost a classic in the electronics/microcontroller community now. This is done by setting the scope to XY-Mode and then controlling the X/Y-deflection of the electron-beam. My Scope has no Z-Channel. I cannot control the intensity of beam (or switches off) by voltage yet
This Project is my shot at this. I use custom hardware (build on perf-board) to archive this goal. I have build a 2-Channel 16bit DAC with an refresh rate of around 1 MSample per second. Further more a usb-interface + driver shall be developed.
My current todo list can be found here
Everything is solder onto pref-boards an connected via pin-headers and jumpers
(Diagram of the System-Hardware components)
The DACs are R-2R-Ladder DAC on a made custom PCB. The Input-Bits are feed from Octal-D-Latches (74HC573) in combination with some other logic ICs to reduce pin usage on the RPi Pico. Data sent via a 8-bit a parallel Bus to
At 1 MHz Square Wave, the analog output signal quality is significantly degraded. Testing revealed that probably R-2R_Ladder DAC is the weak link and needs further improvement. I currently use R = 11kOhm.
Yellow: X-Channel, Blue: Y-Channel, Magenta: Digital Input Signal to the DAC. (Yellow and Blue are coupled to AC, they usually to remove the 2.5V offset)
For testing the optics I did use a Hameg MH 312 Oscilloscope (I got this one used from Kleinanzeigen, so its already falling apart: semi-broken Coupling-switch, not being able focus the beam correctly, X-Pos nob falling off all the time)