DSO183 enclosure, portable with battery and charger.

The DSO183 is mechanically distinct from the DSO138. The DS0138 has the same PCB size, can be built in this case too (the front arrangement is different) and requires a MT3608 Module booster power supply to raise the lithium battery output to 9V.

This enclosure is large enough to contain a flat 2Ah Li-Ion battery, a charger board, and an on/off switch, making the scope fully portable. I omitted the bulky BNC connector; the bandwidth is so low that a BNC is unnecessary. Instead, I soldered two flexible wires with crocodile clips directly to the PCB.

The battery connects to the pins of the USB Type-C connector, with the positive and negative terminals clearly marked on the PCB.

For the cover plate, I used laser-engraved and cut 3mm lacquered plywood. For those who find this material insufficiently technical, drawings are also provided for materials like plexiglass.

The DSO183 is a compact, DIY digital oscilloscope kit featuring a 500kHz bandwidth, 1.5Msps sampling rate, 12-bit ADC, and a 1024-point buffer. It is powered by 5V DC via USB-C and includes a built-in signal generator (producing sine, triangle, and square waves). Designed for electronics enthusiasts, it offers additional features such as waveform storage and parameter display.

This is a clever design based on the STM32C103C8T6 MCU. The signal generator is a very simple circuit, built using the two remaining op-amps of the TL084. The sine waveform has significant distortion. Additionally, for DC calibration, there is a voltage divider providing outputs of 3V, 300mV, 30mV, and even a negative -300mV.

Bandwidth: 500 kHz (improved 2.5x over its predecessor, the DSO138).
Real-time Sampling Rate: 1.5 Msps (Mega Samples per Second).
ADC Resolution: 12-bit.
Waveform Buffer: 1024 points.
Vertical Sensitivity: 10mV/div to 5V/div.
Input Impedance: 1 MΩ.
Max Input Voltage: 50Vpk (Peak).
Coupling Modes: DC, AC, GND.
Horizontal Timebase: 1µs/div to 500s/div.
Trigger Modes: Auto, Normal, Single.
Power Supply: DC 5V via Type-C USB.
Current Consumption: <100mA.
Dimensions: 118 x 76 x 12 mm (approx.).
Key Features:
Integrated Signal Generator: Outputs sine, triangle, and square waves for testing.
Waveform Storage & Recall: Save and retrieve waveforms for analysis.
Parameter Display: Shows max, min, peak, average, RMS, frequency, period, duty cycle.
Single-Board Design: Compact and stable for easy installation.
DIY Kit: Comes as a set of parts for hands-on learning and assembly.