Related Manuals for Velleman-Kit K7203
Summary of Contents for Velleman-Kit K7203
- Page 1 Total solder points: 57 Difficulty level: beginner 1 advanced 3 TO 30VDC / 3A POWER SUPPLY K7203 ILLUSTRATED ASSEMBLY MANUAL H7203IP-1...
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Page 2: Technical Data
Features This kit is meant as an auxiliary or as a permanent power supply for all common Velleman kits based on a stabilized DC voltage between 3 and 30V provided that the consumption does not exceed 3A. Of course this power supply unit can be used for other purposes, as long as the maximum specifications are taken into account. -
Page 3: Assembly Hints
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. - Page 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 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 !
- Page 5 Construction 1. Resistors 3. Capacitors. resistor. R... R6 : 0.18E C... R... C1 : 470pF (471) R1 : 8K2 (8 - 2 - 2 - B) C2 : 100nF (104) (Uout = output voltage) C3 : 100nF (104) Uout 3...8V : 5K6 (5 - 6 - 2 - B) 7.
- Page 6 Construction 9. Power transistor 10. IC. Watch the position of the notch! M3 NUT T1 : MJ3001 or eq. LOCK WASHER Apply some thermo-conducting TRANSISTOR pasta to the bottom side of the transistor and mount it on the IC1 : UA723D PCB simultaneously with the cooling profile following the HEATSINK...
- Page 7 Assembly into a housing 11. Assembly into a housing Depending on the transformer used, one may chose one of two housings with the following reference nr. for ordering: L750 or L760. If the circuit is to be integrated into another housing, it must be provided with ventilation holes (one may make these holes oneself), necessary for the release of the heat developed.
- Page 8 Connection 12. Connection Depending on the output voltage needed, one should chose the right transformer for connection to the circuit according to the table in the parts list. If one choses too high an input voltage, it may well be so that the power transistor is overheated.
- Page 9 Connection TRANSFORMER MAINS LOAD +OUT K7203 Desired Desired transformer Desired fuse Desired fuse ordercode regulated 230VAC 110VAC only @230VAC output voltage 3...5V 9V / 30VA - 160mA Slow 315mA Slow 5...8V 12V / 50VA - 5012 250mA Slow 500mA Slow 8...13V...
- Page 10 13. PCB layout.
- Page 11 Diagram 14. Diagram INPUT MJ3001 100n 10000u 0.18/5W OUTPUT 100n 100u VOLTAGE ADJUST NON INV 470p COMP...
- Page 12 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. H7203IP - 2004 - ED1 5 4 1 0 3 2 9 2 8 9 7 4 4...