I came across a DSO138 DIY Digital Oscilloscope Kit (SMD Soldered Version) on the Internet recently that looked like a fun project for the kids and me to work on together.  The price didn’t seem bad at $24 w/free shipping.  I ordered the optional clear acrylic case to go with it for another $7.50 more.

Basic specs (from the supplier site):

• Maximum real-time sampling rate: 1Msps
• Accuracy: 12Bit
• Sampling buffer depth: 1024 bytes
• Analog bandwidth: 0 – 200KHz
• Vertical Sensitivity: 10mV / Div – 5V / Div (1-2-5 progressive manner)
• Adjustable vertical displacement, and with instructions
• Input impedance: 1MΩ
• Maximum input voltage: 50Vpp (1: 1 probe), 400Vpp (10: 1 probe)
• Coupling modes: DC / AC / GND
• The horizontal time base range: 10μs / Div – 50s / Div (1-2-5 progressive manner)
• With automatic, regular and one-shot mode, easy to capture the moment waveform
• Available rising or falling-edge trigger
• Adjustable trigger level position, and with instructions
• Observable previous trigger waveform (negative delay)
• Can freeze at any time waveform display (HOLD function)
• Comes with a 1Hz /3.3V square wave test signal source

It came in the mail this weekend.  In the box was the case kit, bag of parts, main board, display board, test cable, assembly checklist, and a basic how to use guide:

I plan to post updates on the build experience with photos along the way.  Stay tuned!

Wayne,  AG1A