The guys from fpga4fun have this interesting recipe for a simple digital oscilloscope which is made with the following parts:
- 1 x Pluto FPGA board, with TXDI and cable (item#1121, $39.95)
- 1 x Flash acquisition board (item#1200, $29.95)
- 1 x BNC (item#1250, $4.95)
- 1 x Nylon standoffs (item#1270, $0.95)
- 1 x Male/female connectors 2×8 (item#1275, $2.95)
That’s about $78.75 so you can also call it a cheap oscilloscope because all commercial oscilloscopes are priced higher than $70.
FPGA Digital Oscilloscope: [Link]
FPGAs make great video controllers and can easily control graphic LCD panels. Graphic LCD panels are more advanced than text lcd panels and can display interesting stuff. The graphic LCD panels have a digital interface and can be interfaced in two ways:
- With a Video-like interface
- With a CPU-peripheral-like interface
Graphic LCD Pannel Interfaced With FPGA: [Link]
Text LCD modules are cheap and easy to interface using a microcontroller or FPGA. To control an LCD module, you need 11 IO pins to drive an 8-bits data bus and 3 control signals. Most of the LCD modules are based on the HD44780 chip or compatible and the internet is full of resources on how to interface those.
FPGA Chip Interfaced With LCD Module: [Link]