1. Introduzione
The PEMENOL GY21309 is a DIY electronic soldering kit designed to assemble a 6-digit digital clock with integrated LED music spectrum effects. This kit serves as an educational tool for learning soldering techniques and circuit understanding, while also providing a functional digital clock that can display time or dynamic music spectrums based on ambient sound.
The device automatically switches between music spectrum display when sound is detected and time display when silent. Users can customize various settings, including 18 music spectrum display modes, brightness, and time format.
2. Caratteristiche del prodotto
- Six-Digit LED Display: Provides clear timekeeping with support for 12-hour and 24-hour formats.
- 18 Music Spectrum Effects: Dynamic visual effects that respond to sound via a built-in microphone module.
- Commutazione automatica della modalità: Seamlessly transitions between spectrum display and clock display based on ambient sound levels.
- Impostazioni regolabili: Customizable spectrum display modes, light flashing speed, display brightness, and sound sensitivity.
- Nighttime Power-saving Mode: Automatically lowers brightness during a user-defined period for comfortable viewing.
- Memoria di spegnimento: Retains settings and time during power interruptions.
- Dual USB Power Supply: Offers flexible power connection options.
- DIY Soldering Project: An engaging kit for enhancing soldering skills, particularly with Surface Mount Device (SMD) components.

Image: The assembled PEMENOL GY21309 digital clock displaying time, with icons illustrating key features such as 12/24H time, USB power, 18 spectral effects, brightness control, and night mode.
3. Contenuto della confezione
Upon opening the package, verify that all components are present. The kit typically includes:
- PCB principale (circuito stampato)
- LED Matrix Display Modules (6 units)
- Microcontroller (MCU) chip
- DS1302 Real-Time Clock (RTC) IC
- 32.768KHz Crystal Oscillator
- Modulo microfono
- CR1220 Battery Holder and Battery (for RTC backup)
- Various Resistors, Capacitors (including SMD components)
- Push Buttons (for settings adjustment)
- Cavo Micro USB
- Acrilico Casing Components (if included in specific variant)
- Printed User Manual (for detailed assembly steps)

Immagine: Un overview of the PEMENOL GY21309 kit components, including the main PCB, LED matrix modules, various electronic components, and a USB cable, alongside the fully assembled clock.
4. Istruzioni di montaggio
This kit involves soldering, including Surface Mount Device (SMD) components. It is recommended for individuals with prior soldering experience or those looking to develop advanced soldering skills. Refer to the detailed, full-color printed user manual included in your package for step-by-step assembly instructions.
4.1 Important Considerations for SMD Soldering
- La pazienza è la chiave: SMD components are small and require precision.
- Utensili: A fine-tip soldering iron, thin solder wire, flux, tweezers, and a magnifying glass or microscope are highly recommended.
- Tecnica: Be mindful of bridging pins. For complex SMD chips, techniques like drag soldering or using solder paste with a hot air station may be beneficial.

Image: A hand using a soldering iron to attach a small Surface Mount Device (SMD) component to a circuit board, illustrating the precision required for assembly.
4.2 Identificazione dei componenti
Familiarize yourself with the components and their placement on the PCB before soldering. The included manual provides a detailed component layout. Below are visual aids for reference.

Immagine: Un dettaglio view of the PEMENOL GY21309 circuit board with key components such as the SET button, CR1220 battery holder, MCU, capacitor, microphone module, crystal oscillator, and DS1302 clock IC clearly labeled.

Image: A circuit schematic diagram illustrating the connections and components of the PEMENOL GY21309 digital clock, including LED matrix drivers, the DS1302 RTC, and the microcontroller.
5. Istruzioni per l'uso
Once assembled and powered via the Micro USB port, the clock will display the current time or switch to spectrum mode if sound is detected. Use the integrated buttons to navigate and adjust settings.
5.1 Funzionamento di base
- Accensione: Connect the Micro USB cable to a 5V DC power source.
- Modalità automatica: The clock will automatically display the music spectrum when sound is present and revert to time display when silent.
5.2 Impostazione della funzione
The device typically uses one or two buttons for all settings. Refer to your printed manual for exact button functions. Generally, a short press cycles through options, and a long press enters/exits a setting mode.
- Impostazioni di accesso: Press and hold the 'SET' button (or equivalent) for approximately one second.
- Regola i valori: Lightly press the button once to change the value or cycle through options.
- Impostazioni di navigazione: Press and hold the button again to move to the next setting screen.

Image: A hand interacting with the PEMENOL GY21309 digital clock, demonstrating the process of accessing and adjusting settings using the control button.
5.3 Opzioni di personalizzazione
- Formato ora: Passa dalla visualizzazione a 12 ore a quella a 24 ore.
- Spectrum Display Modes: Cycle through 18 different visual effects.
- Regolazione della luminosità: Set the desired display brightness level.
- Modalità notturna: Configure a time period for automatic dimming.
- Sensibilità audio: Adjust the microphone's sensitivity for spectrum activation.

Image: A series of four images showcasing different dynamic spectral effects displayed on the PEMENOL GY21309 digital clock, illustrating the variety of visual patterns available.
6. Specifiche
| Parametro | Valore |
|---|---|
| Volume di lavorotage | CC 5V |
| Colore dello schermo | Verde |
| Tipo di alimentazione | Micro USB |
| Temperatura di lavoro | -40℃ a 85℃ |
| Umidità di lavoro | 5% al 95% di umidità relativa |
| Installed Size (L x W x H) | 128 x 32 x 18 mm (circa 5.04 x 1.26 x 0.71 pollici) |
| Materiale | Iron, Paper (PCB and components) |
| Stile di visualizzazione | Digital LED Matrix |
| Caratteristiche speciali | Adjustable Brightness, Night Mode, 18 Spectrum Effects |
7. Risoluzione Dei Problemi
- Nessuna alimentazione/display: Ensure the Micro USB cable is securely connected to a 5V DC power source. Check for any short circuits or unsoldered connections on the PCB, especially around the power input and main ICs.
- Visualizzazione dell'ora errata: Verify the CR1220 backup battery is correctly installed and functional. Re-enter time settings as per the operating instructions.
- Spectrum Not Responding: Check the microphone module's soldering and ensure its connection to the main PCB is secure. Adjust the audio sensitivity setting.
- Partial Display/Missing Segments: Inspect the soldering of the LED matrix modules and their connections to the main PCB. Cold solder joints or bridges can cause display issues.
- Difficulty with SMD Components: If you encounter issues with tiny SMD components, consider using additional tools like a magnifying lamp, fine-tip tweezers, and a very fine soldering tip. Practice on scrap boards if available.
8. Manutenzione
- Pulizia: Utilizzare un panno morbido e asciutto per pulire il display e casing. Evitare detergenti abrasivi o solventi.
- Ambiente: Keep the device in a dry environment, away from direct sunlight, extreme temperatures, and high humidity to ensure longevity.
- Fonte di energia: Always use a stable 5V DC power supply to prevent damage to the electronic components.
9. Garanzia e supporto
For warranty information or technical support, please refer to the contact details provided in your product packaging or on the PEMENOL official website. Ensure you have your purchase details and model number (GY21309) ready when contacting support.




