Total solder points: 313 Difficulty level: beginner 1 2 3 4 5 advanced USB Experiment interface board K8055N Interface your computer with the world using 5 digital in– and 8 outputs, 2 analogue in-and outputs. ILLUSTRATED ASSEMBLY MANUAL H8055N-UK.
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Features Minimum system requirements: 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor USB1.1 or higher connection Windows XP or later Specifications 5 digital inputs (0= ground, 1= open) (on board test buttons provided) 2 analogue inputs with attenuation and amplification option (internal test +5V provided) 8 digital open collector output switches (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.
REMOVE THEM FROM THE TAPE ONE AT A TIME ! DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE. ALWAYS CHECK THEIR VALUE ON THE PARTS LIST! H8055N-UK.
Construction 1. Jumper J 2. Diodes, check the polarity ! CATHODE D... D1 : 1N4148 D2 : 1N4148 3. Resistors R...
Construction 4. Ceramic Capacitors C7 : 100nF C8 : 100nF C9 : 100nF (104, 0.1, u1) (104, 0.1, u1) (104, 0.1, u1) 5. Ceramic Capacitors C... C1 C2 C3 C4 C5 C6 : : : : : : 27pF 27pF 22nF 22nF 22nF 22nF (27) (27) (223) (223) (223) (223) 6. LED’s. Watch the polarity! LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 LD9 LD10 LD11 LD1 CATHODE 3mm RED IC1 : IC2 : IC3 : IC4 : 14P 18P 28P 18P 9. Potentiometer 7.
Construction 11. Header 14. Quartz crystal 16. Voltage regulator X... SK2 : 2P SK3 : 2P X1 : 4MHz SK5 : 2P SK6 : 2P VR1: LM317 15. Screw connectors SK1 : 3P 12. USB connector SK7: CC089 SK4 : 2 x 3P 17. IC’s. Watch the position of the notch! IC1 : TLV274IN IC2 : ULN2803 IC3 : VK8055 (Programmed PIC18F24J50) IC4 : ULN2803 13. Electrolytic capacitor. Watch the polarity ! 1 C10 : 4,7µF C11 : 10µF C... PIN 1 SK8 : 5 x 3P 8 H8055N-UK.
Construction 18. GAIN FACTOR The analogue inputs A1 and A2 have a standard range of 0 ~ +5Vdc. To use them externally, remove the jumper caps on SK2 and SK3. The internal 5V voltage source can only be used for testing purposes. When the input voltage is too low you can amplify it x4 / x15. A gain of x4 requires a resistance of 3K3 for R53 (input signal 1) and for R54 (input signal 2). A x15 gain requires a resistance of 820ohm. When the gain is set to e.g. x4, the max.
Connection / settings 20. Connection / settings 2 Analog or PWM outputs 8 open collector outputs Address selection - 5 digital inputs Analog signal adjust + 2 analog inputs Internal / external voltage DC voltage 5 ... 30V Test LEDs Test buttons If the jumper is mounted, then you can use the internal voltage and adjust it using RV2/RV1. If the jumper is not mounted you must use the external voltage A2/A1. 10 H8055N-UK.
Connection / settings Select the correct address in the test program DIGITAL OUTPUTS : 8 open collector contacts, to be connected with suitable inputs. These exits function as ‘dry contact points’: you need an external voltage to control a component such as a LED or a relay switch. ANALOGUE OUTPUTS : 2 analogue outputs with an output voltage between 0 and +5V (impedance 1K5). 2 PWM outputs with a pulse width modulation between 0 and 100%. A fixed PWM frequency (23.43kHz) is used.
Test procedure The message "Card x connected" is displayed if the connection is successful You can now simulate the inputs via push buttons Inp1 through Inp5. The matching check box remains ticked off as long as you keep one of the push buttons pressed down. Always tick off the check box for the matching output if you wish to test a digital output. You can also conduct this procedure automatically : press the 'output test' button or activate all outputs with the 'Set all digital' button.
Connection scheme 22. Connection Scheme + Analog voltage 0 ...5V - A1 A2 GND Analog input example PWM output example I1 I2 I3 I4 I5 GND Digital input example Digital output example 13 H8055N-UK.
PCB 23. PCB 14 H8055N-UK.
Schematic diagram 24. Schematic diagram. 15 H8055N-UK.
Modifications and typographical errors reserved - © Velleman nv. H8055N'IP Velleman NV, Legen Heirweg 33 - 9890 Gavere. H8055N-UK.