Total solder points: 144 Difficulty level: beginner 1 2 3 4 5 advanced DC CONTROLLED DIMMER K8064 ent adjustem s s e tn h age.
This dimmer is a practical circuit enabling you to adjust the brightness of a lamp or a group of lamps via an adjustable direct tension. This tension can have various sources e.g. an analogue output of our K8000, K8055, VM110, ... The dimmer can use both resistive loads (e.g. light bulb) and inductive loads (halogen lighting). Use a conventional (wirewound) transformer for low voltage halogen lighting (12V). Most electronic transformers are not compatible with this dimmer.
Features & Specifications Features: Simple brightness adjustment by means of a DC voltage. Optically isolated adjust input. Pre-set adjustment for full brightness. Suitable for incandescent lamps, mains voltage halogen lighting and low voltage halogen lighting in combination with a conventional transformer. "Soft start" feature to ensure lamp longevity. Transformer protection in case of defective light sources. LED status indication. Compatible with our computer interface cards: K8000, K8055, VM110.
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 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder joints are cone-shaped and shiny 3- Trim excess leads as close as possible to the solder joint AXIAL COMPONENTS ARE TAPED IN THE CORRECT MOUNTING SEQUENCE ! REMOVE THEM FROM THE TAPE ONE AT A TIME ! You will find the colour code for the resistances and the LEDs in the HALG (general manual) and on our website: http://www.velleman.be/common/service.
Construction 1. Jumpers 4. 1/2w (Metal film) resistors R... J : 3x 2. Diodes. Watch the polarity ! D1 D2 D3 D4 : : : : 1N4148 1N4007 1N4148 1N4148 CATHODE D...
Construction 7. LEDs. Watch the polarity! 10. Resistor trimmer 13. Voltage regulator RV1 COLOR= 2...5 RV1 : 220K (250K) RV2 : 2M2 (2M5) LD1 : 3mm Green LD2 : 3mm Red VR1 : UA78L05 VR... LD... 11. 1W Resistor CATHODE R... 14. Capacitor. 8. Zenerdiode. Watch the polarity ! +/-5mm CATHODE 5mm 5mm ZD... R20 : 220 ZD2 : 12V 9. IC socket. Watch the position of the notch! (2 - 2 - 1 - B) 12.
Construction 15. Electrolytic Capacitors. Watch the polarity ! C9 : 10µF C10 : 100µF C11 : 220µF 17. Crystal X1 : 10MHz 19. Capacitor. X... C... Choose operating voltage : 16. Terminal connectors 18. Fuse + Fuseholder For 110 - 125VAC : C13 : 1µF / 250V F...
Construction 20. Coil 22. IC’s. Watch the position of the notch! L... IC1 : VK8064 (programmed PIC16F676) IC2 : TIL111 or 4N27 L1 : 1,5mH / 4A 21. Triac. mm 10mm 3 BOLT BOLT M3 LOCK WASHER IMPORTANT : PUT AN EXTRA THICK TIN COATING ON THE ALREADY THINNED PCB TRACKS! M3 NUT TR1 : TIC225M or eq.
Test & adjustment procedure 23. TEST and ADJUSTMENT PROCEDURE: Once the assembly completed, you still need to set the dimmer for your particular application. Use an adjustment voltage of 0 to 5 (or to 12V max). You can now wire the print according to the connection diagram (see page 13). Connect the supply voltage for a brief instant. Upon activation of the device, LD1(green LED) & LD2(red LED) briefly flash together during the self-test.
Test & adjustment procedure Remark: In order to stretch bulb life, we recommend you adjust the minimum setting in such a way that the bulb filament remains heated. This is particularly useful for theatre lighting applications BONUS Function: Activate the bonus function by placing a jumper wire over JP1 and JP2.
Test & adjustment procedure LED indications in case of error: When the CPU detects an error, LD1 (green) lights up continuously, whereas LD2 (red) repeatedly emits a series of flashes. We advise you to briefly interrupt the supply voltage and evaluate the situation.
Connection example 24. CONNECTION EXAMPLE 0 - 10V DEVICE + - For example : K8000, K8055 (VM110), Dimmer pack, ...
PCB 25. PCB layout.
Diagram 26.
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