Supply, Installation of Green Magnetic Chalk Board , Interactive Board, Audio System Smartbell and CCTV arrangements at Ward No. 15 Chinnapavadi municipal middle school in Tiruchengode municipality

GREEN MAGNETIC CHALK BOARD: Material: High Pressure High Abrasive Resistance Material, Size: 96" * 48", Features: Magnetic Chalk Board, Frame Material: Premium Aluminium, Board Color: Green, Shape: Rectangle. High Quality Smooth Writing Surface, Accept Magnet for Chart Presentation, ABS Corners, Nickel Coated Clamp, Galvanized Iron Protection at the Backside, Anodized Aluminium Channel.

Control Unit: Microcontroller: ESP32 Dual Core / ESP8266 (Wi-Fi + BT), Clock Speed: 240 MHz (ESP32) / 80 MHz (ESP8266), Operating Voltage : 3.3 V (Input 5 V via USB or VIN) Connectivity: Wi-Fi 802.11 b/g/n, Bluetooth (ESP32) I/O Pins: 30–34 GPIO pins, Analog Inputs: 12-bit ADC (up to 18 channels ESP32) Digital Outputs: PWM supported, up to 16 channels Communication: UART, SPI, I²C Memory: 520 KB SRAM, 4 MB Flash Real Time Clock: DS3231 / NTP Sync (optional) Power Supply: 5 V USB / 7-12 V via VIN Dimensions: ~25 mm x 50 mm (depends on model) Applications: IoT school bell, PA control, timers, automation, Fire alarm, SOS(optional).

Software and Application: * Automated bell scheduling with default and customizable audio tones * Emergency SOS notifications * Instant bell activation * On-demand announcements with pre-recorded audio or text * AI-powered text-to-speech with Indian accent options * Custom alert and prayer audio uploads * Daily moral or proverb with AI-generated voice * Multilingual support including Gujarati and English * Remote system access via web and mobile applications * Remote device diagnostics and monitoring * Mass communication broadcasting * Holiday and emergency scheduling overrides * Automated birthday announcements * Secure authentication system * Event and analytics dashboard * Expandable up to additional speakers if required * Low power consumption, continuous operation capability * Centralized control via smartphone or computer * Bell rings to all speakers simultaneously. * Announcements can target specific speakers/zones. * * Centralized audio amplification → better quality . * Future expansion possible (more speakers or zones).

Amplifier: 120Watts, AC & 12V DC Operation. Supports: MP3 Player, USB Reader, Card Reader, Bluetooth, Remote Control. Power Output: 160W Max., 120W RMS at 10% THD, 105W RMS at 5% THD, 95W RMS at 2% THD Output Regulation: ≤ 2 dB, no load to full load at 1kHz Input Channels: 5 × Mic 0.65mV/4.7kΩ, 2 × Aux 100mV/470 kΩ Frequency Response: 50-15,000Hz ±3dB Signal to Noise Ratio: 60dB Tone Controls: Bass: ±8dB at 100Hz, Treble: ±8dB at 10kHz Output: Preamp 200mV/600Ω, Line 1V/1kΩ Speaker Outputs: 4Ω, 8Ω, 16Ω, 70V & 100V Ditital Player: MP3 Player with USB, SD and MMC Card Reader Dimensions W420 × H135 × D295 mm Weight 11.0kg-PWD 2025-26

Speaker - Outdoor: Input Power: 25W RMS/38W Max. Impedance: 8Ω Frequency Response: 250-10,000Hz SPL at 1kHz: 108dB/1W/1m, 122dB/25W/1m Dimensions: 315 x 165 (L290) mm Weight: 1.90kg Material: ABS (UV Protected)

Speaker - Indoor: High quality ABS wall mounting box speaker for indoors speech & background music. 15.24 cm (6”) Full Range Speaker, 6W/100V. Key holes for easy wall mounting. Power tap selection on 100V through female receptacle (push fit). Spc: Input Power: 6W RMS Power Taps on 100V: 6/3/1.5W Impedance: 1.6k/3.3k/6.6kΩ Frequency Response: 60-15,000Hz SPL at 1kHz (1W/1m): 92dB Dimensions: W262 × h262 × D128 mm Weight: 1.50kg

Mic: Single zone desktop paging microphone with a sturdy, aluminium die-cast top and special high reliability switches with integrated LED indicators. Fitted with a flexible 300mm ( 12 Inch ) gooseneck and a high quality unidirectional dynamic cartridge. Supplied with 6 mtrs. twin core shielded low noise cable with 6.3mm (¼”) phone plug. Frequency Response 50-10,000Hz Sensitivity 2.0mV/Pa Impedance 600Ω

Cable and Accessories: Outdoor Building: 4 Core, 0.75mm Cable

Inner Building: 2 Core, 0.50mm Cable

2U Rack: