DSO 32 - Home made digital storage oscilloscope

My older DSO designed in 2004 or so. It was partially disassembled for last few years because I needed some components for newer version but now I had some time so I've finished it. After correction of many design faults it finally works.

Since I had only 89Cx051 parallel programmer that time, I've made it on theese MCUs. It's using three AT89C2051 linked with synchronous serial line. One is used as button interface, second one is used as graphical CPU which adds titles to waveform. Third one is main DSO chip that controls most of the HW. To save some glue logic I've add fourth one 90S2313 that generates sampling frequencies and is used as EEPROM to store button configuration. A bit complicated but it works.
Analog input is made with AD8066 which has relatively low bandwith but could be replaced with faster AD8056. ADC is old 8-bit video digitizer TDA8703.

Time base: 50ms to 500ns/div (250ns/div zoom), 16 samples/div
Sampling: up to 32MHz
Sensitivity: 50mV to 20V/div, 16 levels/div
Input: 1M/25pF, 10MHz
Memory: 256B
Sync: INT, EXT, ONCE, HOLD
Functions: log. analyzer
LCD: 128x64

More details (Czech language) and some photos:
http://www.elektronika.kvalitne.cz/foto/DSO_32.html

Category:

Science & Technology

Tags:

• DSO
• digital
• storage
• oscilloscope
• ATMEL
• LCD
• stand-alone
• 89C2051
• 90S2313
• home
• made

[Thepockets88]

Im jelious

[Nermash]

Great job!

[esavarem]

way best diy oscilloscope I have ever seen! Good work