DSO138mini brings in the following improvements:
Better structure and smaller size. The bulky pin-headers connecting the LCD and main board in old DSO138 has been eliminated. The soldering of these pin-headers has being found problematic for beginners.
USB or battery powered. This makes the scope much more convenient to be used as a portable device. New version analog board (PN: 109-13801-00H, aka "H version") can accommodate a battery charger JYE118 (see here) to make the device more practical.
External trigger input. This input can accept a TTL or LVTTL signal as trigger source.
Serial output of waveform data. This means captured data can be saved and displayed by PC. For example, this photo shows a captured single byte (0x35) sent from a serial port at 115200bps. This photo shows the same waveform displayed on PC using Gnuplot.
General controller. The main board can be used as a general purpose control board with LCD display. MCU ports were brought to board edges for easy connection to the target system.
There are a few optional parts that can be chosen to make the oscilloscope even more complete:
BNC connector. The kit comes with a two-pin header for the simple hook probes (see the manual). This connector replaces the two-pin header and will allow you to connect to standard professional BNC probe.
Standard BNC probe.
Major features of DSO138mini:
Analog bandwidth: 0 - 200KHz
Sampling rate: 1Msps max
Sensitivity: 10mV/Div - 5V/Div
Sensitivity error: < 5%
Vertical resolution: 12-bit
Timebase: 10us/Div - 500s/Div
Record length: 1024 points
External trigger
Built-in 1KHz/3.3V test signal
Waveform frozen (HOLD) function available
Save/recall waveformImportant Notes:
The power supply is not included in the kit. User needs to prepare a USB cable with micro-USB style plug to run the scope. Any USB port with higher than 150mA current capacity can be used as power source for the scope.
Product Documents and firmwares: (Click to open)
DSO138mini Enclosure Assembly Guide| Specifications |
| Number of Channel | 1 |
| Analog Bandwidth | 0 - 200KHz |
| Sensitivity | 10mV/Div - 5V/Div |
| Sensitivity error | < 5% |
| Resolution | 12-bit |
| Input Impedance | 1M ohm |
| Maximum Input voltage | 50Vpk |
| Coupling | DC, AC, GND |
| Max Real-time Sampling Rate | 1Msps |
| Timebase | 10us/Div - 500s/Div |
| Record Length | 1024 |
| Trigger Modes | Auto, Normal, Single |
| Trigger Types | Rising/falling edge |
| Trigger Position | 1/2 of buffer size fixed |
| Display | 2.4-inch color TFT LCD with 320 x 240 resolution |
| Power Supply | 3.5V - 6V DC |
| Supply Current | 120mA @5V |
| Dimension | 85mm x 75mm x 15mm |
| Weight | 50 gram (not including cables) |
Material: Acrylic
Color: Transparent
Please peel off the protective film before use.
Package includes:
1 x Mini Digital Oscilloscope
1 x Acrylic Case
1 x User Manual (English)
