Total solder points: 30 Difficulty level: beginner 1 2 3 4 5 advanced TELEPHONE RINGER WITH BUZZER AND LED K8087 ne line. el with pho ll ra a p in t e plug.
Features & Specifications Features: accepts standard telephone plug simply connect in parallel with phone line no power supply necessary! buzzer sounds and powerful led flashes when phone rings great for noisy environments, for the hearing impaired, as additional ringer, to replace existing ringer,... Specifications: 10.000 mcd led ! connects to PSTN line RJ11 connector consumption: 10mA max.
Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: • A good quality soldering iron (25-40W) with a small tip. • Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will protect the tip, and enables you to make good connections.
Assembly hints 1.
Construction 1. Zener diodes. Watch the polarity! ZD1 : 12V0 ZD2 : 20V0 ZD3 : 20V0 CATHODE ZD... 4. Electrolytic Capacitors. Watch the polarity ! 7. Modular Jack SK1 : 4p (type RJ11) C2 : 10µF / 35V C... 5. LED. Watch the polarity! 2. Resistors 8. Capacitor LD1 : 5mm (super red) R... R1 : 1M R2 : 2K2 (1 - 0 - 5 - B) (2 - 2 - 2 - B) 3. Vertical diodes. Watch the polarity! D1 D2 D3 D4 6 : : : : 1N4007 1N4007 1N4007 1N4007 C1 : 1µF / 275VAC 6.
Connection 9.
Assembly 10.
Schematic diagram Schematic diagram.
PCB PCB 10
VELLEMAN Components NV Legen Heirweg 33 9890 Gavere Belgium Europe www.velleman.be www.velleman-kit.com Modifications and typographical errors reserved © Velleman Components nv.
