DSO138 oscilloscope pinout

The DSO138 is a single-channel digital oscilloscope kit with a BNC input and an onboard square-wave output for probe compensation.

DSO138 13803K / 13804K

7 contacts Current package

JYE Tech · JYE Tech kit connectors for the BNC input, DC supply and test signal.

DSO138 13803K / 13804K pinout

J1 BNC input

Viewed into the input socket. The center is the signal.

J10 DC barrel jack

Viewed into the DC jack. The center is positive. J10 is beside the power header on the PCB.

J9 alternate DC header

PCB pin numbers from the schematic. Use one power entry at a time.

J2 test output

One exposed test contact. Both PCB pads of the terminal carry the same signal.

Selected pin details

J9-1 · DC_IN

Supply input · Power

Positive contact of the alternate PCB power header.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

Electrical limits · Link to this pin

All 7 pins

Pin	Signal	Direction	Function
J1 center	AIN Analog input	Analog input	Connect the probe tip to the measured signal.
J1 shell	AGND Analog return	Analog return	Connect the probe ground clip to the circuit’s common return.
J10 center	DC_IN Supply input	Supply input	Positive contact of the 5.5 × 2.1 mm barrel jack.
J10 sleeve	DC_RETURN Supply return	Supply return	Outer sleeve of the barrel jack.
J9-1	DC_IN Supply input	Supply input	Positive contact of the alternate PCB power header.
J9-2	DC_RETURN Supply return	Supply return	Ground contact of the alternate PCB power header.
J2	TESTSIG Square-wave output	Square-wave output	Onboard 1 kHz, 3.3 V square wave.

Signal assignments

Single-ended BNC input

The displayed voltage is the center contact relative to the BNC shell.

DC supply

The barrel jack and the alternate two-pin header feed the same supply input.

Probe compensation output

Use the scope’s own probe and test contact for compensation.

TESTSIG (J2)

Electrical limits

Parameter	Limit	Conditions and source
DC supply9 V nominal, 8–12 V allowed	9 V nominal, 8–12 V allowed	Center positive. Use a regulated supply rated above 200 mA. JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.
Analog input1 MΩ / 20 pF	1 MΩ / 20 pF	BNC input with the manufacturer’s specified input impedance. JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.
Maximum input50 V peak with a ×1 probe	50 V peak with a ×1 probe	Manufacturer’s limit. The wiring example uses a loose 1.5 V cell. JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.
Analog bandwidth and maximum sample rate200 kHz, 1 MSa/s	200 kHz, 1 MSa/s	The scope samples a single analog input. JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.
Test output1 kHz, 3.3 V	1 kHz, 3.3 V	Built-in square wave on J2. JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

Models and documents

This map covers original JYE Tech kits 13803K and 13804K. The optional J4 Mini-USB footprint is listed without a user function. Use J10 or J9 for power.

DSO138 13803K / 13804K: JYE Tech kit connectors for the BNC input, DC supply and test signal.

JYE Tech DSO138 user manual· JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.
JYE Tech DSO138 product documentation· Kit revisions, input characteristics and DC connector dimensions.