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PREMIUM 3688
Premium 3688 advanced STEM electronics kit with 3,688 components for professional learning, experimentation, and prototyping.
Premium 3688 is a complete, high-end DIY learning and application kit designed for advanced electronics education, innovation, and professional-level prototyping. With an extensive set of 3,688 components/build elements, this premium version enables users to design, experiment, and implement a vast range of electronic circuits and DIY projects.
Built for engineering students, makerspaces, R&D labs, and advanced STEM learners, the kit supports in-depth learning, complex system development, and real-world applications. The Premium 3688 edition offers unmatched versatility, scalability, and hands-on experience, making it ideal for long-term learning and professional use.

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58mm Thermal Printer (Black)
- Heavy-duty 58mm direct thermal printer
- Inbuilt Adapter
- High speed printing of 90mm / Sec
- Free Drivers, USB, Adapter and Paper Roll
- Interface: usb + cash drawer support.
- Works with windows 7 / 8 /10
- High speed printing
- Long life thermal head.
- Perfect print quality
- Low cost,Low noise, fast speed print.
- Support cashbox drive.
- Compact and lightweight,beautiful design.
- Â Built in data bumper (data received when printing).
- Interface type parallel port or serial port.
- Support to enlarge characters and adjust characters spacing for printing.
- Compatible with esc/order pos.
- Operation temperature0~50 Degree C
- Relative humidity10~80%
- Item size 12.8 * 18 * 10.8cm
Creality CR-5 Pro 3D PRINTER/300*325*380mm/multiple materials supported
HC-06 4Pin Bluetooth Module Without Reset Switch
- Working current: matching for 30 mA, matching the communication for 8 mA.
- Dormancy current: no dormancy.
- Used for a GPS navigation system, water, and electricity gas meter reading system.
- With the computer and Bluetooth adapter, PDA, seamless connection equipment.
- Bluetooth module HC-08 Master and slave Two in one module.
- Use the CSR mainstream Bluetooth chip, Bluetooth V2.0 protocol standards.
- Potter default rate of 9600, the user can be set up.
- Bluetooth protocol: Bluetooth Specification v2.0+EDR
- Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps.
- Security: Authentication and encryption.
- Profiles: Bluetooth serial port.
Serial LCD Driver
TB6560 4 Axis Cnc Controller 4 Axis Stepper Motor Driver DSP Controlled 3.5A 24V
- Rated maximum output: ± 4.5A, 40V, Peak 5A, low output impedance, source 0.5?,
- the receiving end of 0.4?, low voltage shutdown, thermal parking and circulation.
- circuit protection. After I design, you can set the current output of 0.5A 1A 1.8A 2.5A.
- 3.3A 4A 4.5A to accommodate more and different motor Current.
- The drive is suitable software mach2, mach3, (mach3 have support WIN7 system), KCAM4 like.
Text to Speech TTL Module (Serial to Speech)
-  Single row 0.1″ header for easy connection to a host system
- Power requirements: +5 VDC
- 30 mA idle
- 46-220 mA active (depending on speech parameters and output load)
- Â Communication: Asynchronous 9600 bps serial (8N1)
- Dimensions: 1.25″x1.5″x0.37″
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Text support rate is better
-
 Interface operation is simpler
-
5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
-
 Voice effect optimization
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 Module miniaturization and easy integration
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Dimension: 33*27.5mm
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With mounting holes

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