Velleman-projects K8004 Assembly instructions Instrukcja Użytkownika

Dc to Pulse Width Modulator K8004 ILLUSTRATED ASSEMBLY MANUAL H8004IP-2 Total solder points: 82 Difficulty level: beginner 1  2 3 4 5  adva

10 PCB 17. PCB P8004'2

11 18. Schematic diagram. Schematic diagram T1 D2 D1

Modifications and typographical errors reserved © Velleman Components nv. H8004IP - 2003 - ED3 VELLEMAN Components NV Legen Heirweg 33 9890 Gavere Bel

2 Features:  PWM range: 0 to 100%.  PWM frequency: 100 to 5000Hz adjustable.  Minimum PWM offset: 0 to 20% adjustable.  Adjustable sensitivity:

3 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 s

4 Assembly hints 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder j

5  R1 : 220 (2-2-1-B)  R2 : 220 (2-2-1-B)  R3 : 2K2 (2-2-2-B)  R4 : 2K2 (2-2-2-B)  R5 : 10K (1-0-3-B)  R6 : 100K (1-0-4-B) 

6 Construction  T1 : BC547 7. Transistor  C5 : 10µ F  C6 : 10µ F  C7 : 100µ F (40Vmin) 8. Electrolytic capacitor. Watch the polarity ! C...

7 Test 14. Test  Connect the supplied 4k7 resistor between the + and - points of the load.  Connect the Vref point to the DC input.  Set preset RV3

8 Different configurations  Figure A : Standard configuration, use a separate control voltage.  Figure B : Connection to one of the analogue o

9 Setting up 16. Setting up  RV1: setting the minimum output voltage. Set the control voltage to zero (perhaps by disconnecting it). An initial pre-v