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DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered
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DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered
The DSO138 is a compact, fully-assembled digital oscilloscope featuring a 2.4-inch TFT color display, designed for field measurements, circuit debugging, and educational electronics projects. Electronics engineers, hobbyists, and students use this portable instrument to capture and analyze waveforms up to 200kHz bandwidth with 1Msps sampling rate in a pocket-sized form factor. This device solves the critical problem of needing professional-grade signal analysis capabilities without the bulk, cost, and complexity of traditional benchtop oscilloscopes.
Product Overview
The DSO138 operates on the principle of digital signal sampling and reconstruction, converting analog waveforms into digital data through an 8-bit ADC converter, then displaying them on a high-resolution TFT screen with real-time refresh capabilities. The oscilloscope uses a single-channel input architecture with automatic voltage scaling and timebase adjustment, allowing users to capture signals ranging from millivolts to tens of volts across multiple frequency ranges. Its compact design integrates a 1200mAh rechargeable lithium battery providing 3-4 hours of continuous operation, making it ideal for on-site troubleshooting and field service applications where AC power is unavailable.
What distinguishes the DSO138 from competing portable oscilloscopes is its exceptional value proposition combining genuine measurement capabilities with educational accessibility. The pre-soldered kit configuration eliminates assembly complexity while maintaining full functionality, featuring a professional-grade probe with 1X/10X attenuation switching, protective carrying case, USB charging capability, and comprehensive user documentation. The device includes multiple triggering modes (auto, normal, single), adjustable voltage sensitivity from 10mV/div to 5V/div, and timebase settings from 1µs/div to 500ms/div, enabling precise capture of everything from high-frequency digital signals to slow analog transients.
Key Specifications
| Specification | Details |
| Product Type | Handheld Digital Oscilloscope Kit |
| Brand | DSO138 |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Display | 2.4-inch TFT Color LCD, 320x240 pixels |
| Bandwidth | 200kHz analog bandwidth |
| Sampling Rate | 1Msps (1 million samples per second) |
| ADC Resolution | 8-bit digital resolution |
| Battery | 1200mAh rechargeable lithium-ion |
| Operating Time | 3-4 hours continuous use |
| Input Impedance | 1MΩ with 25pF capacitance |
| Voltage Sensitivity | 10mV/div to 5V/div (8 ranges) |
| Timebase | 1µs/div to 500ms/div (20 ranges) |
| Trigger Modes | Auto, Normal, Single |
| Dimensions | 165 x 100 x 35mm |
| Weight | Approximately 200 grams |
| Probe Included | 1X/10X switchable attenuation probe |
Key Features
- 2.4-inch TFT Color Display with 320x240 pixel resolution providing clear, detailed waveform visualization with color-coded signals and grid overlays for precise measurement
- 200kHz Analog Bandwidth with 1Msps sampling rate enabling accurate capture of digital logic signals, audio frequencies, and power supply ripple measurements
- 8-level Voltage Sensitivity from 10mV/div to 5V/div allowing measurement of both weak sensor signals and high-voltage circuit nodes without external attenuation
- 20-range Timebase from 1µs/div to 500ms/div supporting analysis of fast digital pulses, PWM signals, and slow analog transients in single acquisition
- 1200mAh Rechargeable Battery with USB charging providing 3-4 hours of field operation without AC power dependency
- Automatic Voltage Scaling and Trigger Coupling with AC/DC selection eliminating manual calibration and simplifying measurements for beginners
- 1X/10X Switchable Probe with protective cap enabling safe measurement of both low-voltage logic circuits and higher-voltage power circuits
- Multiple Triggering Modes including Auto, Normal, and Single-shot capture for stable waveform display and transient event capture
Applications and Use Cases
- Digital Circuit Debugging: Capture and analyze clock signals, data lines, and control signals in microcontroller projects to verify timing relationships and identify signal integrity issues in real-time
- Power Supply Troubleshooting: Measure output voltage ripple, load transient response, and noise characteristics of DC power supplies to ensure compliance with circuit requirements
- Audio Signal Analysis: Monitor audio waveforms from amplifiers and audio codecs, measure frequency response, and detect distortion in analog audio circuits
- Motor Control Verification: Analyze PWM signals driving motor controllers, measure back-EMF characteristics, and verify commutation timing in brushless DC motor systems
- Sensor Signal Conditioning: Troubleshoot analog sensor outputs including thermocouples, pressure transducers, and accelerometers to validate signal conditioning circuits
- Educational Electronics Training: Ideal for university labs and technical institutes to teach oscilloscope operation, signal theory, and practical circuit measurement techniques without expensive benchtop equipment
- Field Service and Maintenance: Portable solution for technicians performing on-site equipment repairs, enabling waveform capture and signal analysis in remote locations
- Embedded Systems Development: Verify SPI, I2C, and UART communication signals during firmware development and hardware integration testing
How to Use
To begin operation, charge the DSO138 using the included USB cable for 2-3 hours until the battery indicator shows full capacity. Power on the device using the front panel button and allow the display to initialize. Connect your test signal to the BNC input connector using the provided probe, selecting the appropriate 1X or 10X attenuation based on your signal voltage range. For low-voltage signals below 50V, use 1X mode; for higher voltages up to 500V, switch to 10X mode. Adjust the voltage sensitivity knob to position your waveform in the vertical center of the display, typically starting at 1V/div for general-purpose measurements.
Configure the timebase using the horizontal timebase knob to display 2-3 complete cycles of your test signal on screen. Select the appropriate trigger mode: use Auto mode for continuous waveform display during initial setup, Normal mode for stable triggering on specific signal edges, and Single mode for capturing one-time transient events. The trigger level control allows you to set the voltage threshold where the oscilloscope begins capturing data. For AC signals, select AC coupling to remove DC offset; use DC coupling when measuring signals containing DC components. Monitor the battery indicator regularly and recharge when the level drops below 20% to ensure uninterrupted operation. All measurements can be read directly from the on-screen grid using the vertical and horizontal cursors for precise voltage and timing analysis.
Frequently Asked Questions
What is the maximum voltage the DSO138 can safely measure?
The DSO138 can measure up to 500V peak when using the 10X probe attenuation setting. The input impedance is 1MΩ with 25pF capacitance. For safety, always verify the probe setting matches your measurement range before connecting to the circuit. Exceeding 500V may permanently damage the input stage. For measurements above 500V, external high-voltage probes with appropriate attenuation ratios must be used.
How does the 1X/10X probe attenuation affect measurements?
The probe attenuation setting directly scales the voltage reading on the display. In 1X mode, the display shows actual voltage; in 10X mode, the displayed voltage is divided by 10. For example, a 5V signal appears as 0.5V on screen in 10X mode. Always select the attenuation that best fits your signal amplitude to maximize vertical resolution and measurement accuracy. The probe physical switch must match the oscilloscope setting for correct readings.
What sampling rate and bandwidth limitations should I consider?
The DSO138 features 1Msps sampling rate and 200kHz analog bandwidth, meaning it can accurately capture signals up to approximately 100kHz (following Nyquist theorem requiring minimum 2x oversampling). For signals above 100kHz, aliasing may occur where high-frequency components appear as lower-frequency artifacts. This limitation makes the DSO138 ideal for audio, power supply, and low-frequency digital signals but unsuitable for RF or high-speed digital protocol analysis above 1MHz.
How long does the battery last and how is it recharged?
The 1200mAh lithium-ion battery provides 3-4 hours of continuous operation under typical use conditions. Recharge using the included USB cable connected to any standard USB power adapter or computer USB port. Full charging takes 2-3 hours. The device displays battery level on screen. For field use, consider carrying a portable USB power bank to extend operating time. Battery life decreases with age; expect reduced capacity after 300-500 charge cycles.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi,
Buy DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered Online in India
Purchase the DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered
The DSO138 is a compact, fully-assembled digital oscilloscope featuring a 2.4-inch TFT color display, designed for field measurements, circuit debugging, and educational electronics projects. Electronics engineers, hobbyists, and students use this portable instrument to capture and analyze waveforms up to 200kHz bandwidth with 1Msps sampling rate in a pocket-sized form factor. This device solves the critical problem of needing professional-grade signal analysis capabilities without the bulk, cost, and complexity of traditional benchtop oscilloscopes.
Product Overview
The DSO138 operates on the principle of digital signal sampling and reconstruction, converting analog waveforms into digital data through an 8-bit ADC converter, then displaying them on a high-resolution TFT screen with real-time refresh capabilities. The oscilloscope uses a single-channel input architecture with automatic voltage scaling and timebase adjustment, allowing users to capture signals ranging from millivolts to tens of volts across multiple frequency ranges. Its compact design integrates a 1200mAh rechargeable lithium battery providing 3-4 hours of continuous operation, making it ideal for on-site troubleshooting and field service applications where AC power is unavailable.
What distinguishes the DSO138 from competing portable oscilloscopes is its exceptional value proposition combining genuine measurement capabilities with educational accessibility. The pre-soldered kit configuration eliminates assembly complexity while maintaining full functionality, featuring a professional-grade probe with 1X/10X attenuation switching, protective carrying case, USB charging capability, and comprehensive user documentation. The device includes multiple triggering modes (auto, normal, single), adjustable voltage sensitivity from 10mV/div to 5V/div, and timebase settings from 1µs/div to 500ms/div, enabling precise capture of everything from high-frequency digital signals to slow analog transients.
Key Specifications
| Specification | Details |
| Product Type | Handheld Digital Oscilloscope Kit |
| Brand | DSO138 |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Display | 2.4-inch TFT Color LCD, 320x240 pixels |
| Bandwidth | 200kHz analog bandwidth |
| Sampling Rate | 1Msps (1 million samples per second) |
| ADC Resolution | 8-bit digital resolution |
| Battery | 1200mAh rechargeable lithium-ion |
| Operating Time | 3-4 hours continuous use |
| Input Impedance | 1MΩ with 25pF capacitance |
| Voltage Sensitivity | 10mV/div to 5V/div (8 ranges) |
| Timebase | 1µs/div to 500ms/div (20 ranges) |
| Trigger Modes | Auto, Normal, Single |
| Dimensions | 165 x 100 x 35mm |
| Weight | Approximately 200 grams |
| Probe Included | 1X/10X switchable attenuation probe |
Key Features
- 2.4-inch TFT Color Display with 320x240 pixel resolution providing clear, detailed waveform visualization with color-coded signals and grid overlays for precise measurement
- 200kHz Analog Bandwidth with 1Msps sampling rate enabling accurate capture of digital logic signals, audio frequencies, and power supply ripple measurements
- 8-level Voltage Sensitivity from 10mV/div to 5V/div allowing measurement of both weak sensor signals and high-voltage circuit nodes without external attenuation
- 20-range Timebase from 1µs/div to 500ms/div supporting analysis of fast digital pulses, PWM signals, and slow analog transients in single acquisition
- 1200mAh Rechargeable Battery with USB charging providing 3-4 hours of field operation without AC power dependency
- Automatic Voltage Scaling and Trigger Coupling with AC/DC selection eliminating manual calibration and simplifying measurements for beginners
- 1X/10X Switchable Probe with protective cap enabling safe measurement of both low-voltage logic circuits and higher-voltage power circuits
- Multiple Triggering Modes including Auto, Normal, and Single-shot capture for stable waveform display and transient event capture
Applications and Use Cases
- Digital Circuit Debugging: Capture and analyze clock signals, data lines, and control signals in microcontroller projects to verify timing relationships and identify signal integrity issues in real-time
- Power Supply Troubleshooting: Measure output voltage ripple, load transient response, and noise characteristics of DC power supplies to ensure compliance with circuit requirements
- Audio Signal Analysis: Monitor audio waveforms from amplifiers and audio codecs, measure frequency response, and detect distortion in analog audio circuits
- Motor Control Verification: Analyze PWM signals driving motor controllers, measure back-EMF characteristics, and verify commutation timing in brushless DC motor systems
- Sensor Signal Conditioning: Troubleshoot analog sensor outputs including thermocouples, pressure transducers, and accelerometers to validate signal conditioning circuits
- Educational Electronics Training: Ideal for university labs and technical institutes to teach oscilloscope operation, signal theory, and practical circuit measurement techniques without expensive benchtop equipment
- Field Service and Maintenance: Portable solution for technicians performing on-site equipment repairs, enabling waveform capture and signal analysis in remote locations
- Embedded Systems Development: Verify SPI, I2C, and UART communication signals during firmware development and hardware integration testing
How to Use
To begin operation, charge the DSO138 using the included USB cable for 2-3 hours until the battery indicator shows full capacity. Power on the device using the front panel button and allow the display to initialize. Connect your test signal to the BNC input connector using the provided probe, selecting the appropriate 1X or 10X attenuation based on your signal voltage range. For low-voltage signals below 50V, use 1X mode; for higher voltages up to 500V, switch to 10X mode. Adjust the voltage sensitivity knob to position your waveform in the vertical center of the display, typically starting at 1V/div for general-purpose measurements.
Configure the timebase using the horizontal timebase knob to display 2-3 complete cycles of your test signal on screen. Select the appropriate trigger mode: use Auto mode for continuous waveform display during initial setup, Normal mode for stable triggering on specific signal edges, and Single mode for capturing one-time transient events. The trigger level control allows you to set the voltage threshold where the oscilloscope begins capturing data. For AC signals, select AC coupling to remove DC offset; use DC coupling when measuring signals containing DC components. Monitor the battery indicator regularly and recharge when the level drops below 20% to ensure uninterrupted operation. All measurements can be read directly from the on-screen grid using the vertical and horizontal cursors for precise voltage and timing analysis.
Frequently Asked Questions
What is the maximum voltage the DSO138 can safely measure?
The DSO138 can measure up to 500V peak when using the 10X probe attenuation setting. The input impedance is 1MΩ with 25pF capacitance. For safety, always verify the probe setting matches your measurement range before connecting to the circuit. Exceeding 500V may permanently damage the input stage. For measurements above 500V, external high-voltage probes with appropriate attenuation ratios must be used.
How does the 1X/10X probe attenuation affect measurements?
The probe attenuation setting directly scales the voltage reading on the display. In 1X mode, the display shows actual voltage; in 10X mode, the displayed voltage is divided by 10. For example, a 5V signal appears as 0.5V on screen in 10X mode. Always select the attenuation that best fits your signal amplitude to maximize vertical resolution and measurement accuracy. The probe physical switch must match the oscilloscope setting for correct readings.
What sampling rate and bandwidth limitations should I consider?
The DSO138 features 1Msps sampling rate and 200kHz analog bandwidth, meaning it can accurately capture signals up to approximately 100kHz (following Nyquist theorem requiring minimum 2x oversampling). For signals above 100kHz, aliasing may occur where high-frequency components appear as lower-frequency artifacts. This limitation makes the DSO138 ideal for audio, power supply, and low-frequency digital signals but unsuitable for RF or high-speed digital protocol analysis above 1MHz.
How long does the battery last and how is it recharged?
The 1200mAh lithium-ion battery provides 3-4 hours of continuous operation under typical use conditions. Recharge using the included USB cable connected to any standard USB power adapter or computer USB port. Full charging takes 2-3 hours. The device displays battery level on screen. For field use, consider carrying a portable USB power bank to extend operating time. Battery life decreases with age; expect reduced capacity after 300-500 charge cycles.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi,
Buy DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered Online in India
Purchase the DSO138 2.4? TFT Handheld Pocket-size Digital Oscilloscope Kit DIY Parts Electronic Learning Set Soldered online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.