Bill of materials and instructions for SMDTrain (D) 26 June 2008 The PCB consists of functional and non-functional secctions. Parts are supplied to complete the functional section, the non-functional section is a realistic soldering practice area. Your tutor will explain how your PCB may have a small number of flaws requiring correction before correct operation can be obtained. Whereever possible, PbSn (Lead) finish parts have been supplied. Where PbSn parts are not available and ROHS parts are substituted it is noted below or on packaging C1,C3,C6,C11 1uF RAD5 capacitor, ROHS parts (not PbSn) supplied C2,C4,C5,C8,C12,C13,C14,C15 100nf 0805 SMT capacitor Pb/Sn finish parts supplied C7 1nf RAD5 capacitor C9 100uf RAD5 electrolytic, ROHS parts supplied C10 100uf RAD5 electrolytic, fit large part (Brown) CN1 3 Way 5mm pitch terminal block, ROHS parts (not PbSn) supplied If 2 Way 5mm pitch terminal block is given as a substitute, ensure that it is fitted to the right two holes, the two labelled "Gnd" and "+12V". Which ever terminal block is in place, connect either a 9V plugpack to Gnd and +12V (positive lead to the +12V) or a 9V battery snap (Red lead to the +12V) Do not connect to "+5V" terminal - that is regulated onboard 5V D1,D2,D3 1N4148 diode; Inspect & Retin leads if rqd to ensure solderability D4 1N4002 diode, 10mm lead pitch IC1 LM339, SO14 SMT package IC2 74HC14, DIP14 (May substitute 74HCT14) ROHS parts may be supplied IC3 74HC74, DIP14 (May substitute 74HCT74) ROHS parts supplied IC4 74HC00, DIP14 (May substitute 74HCT00) ROHS parts supplied IC5 74HC161, DIP16 (May substitute 74HC163) IC6,IC7 74HC138, DIP16 ROHS parts supplied, note NE4 on device packaging J1 LEDFLASH, SIP3 J1Shunt Fit across pins 1+2 of J1 to enable flash on correct answer L1,L2,L3,L4 Orange LED, 5mm (May substitute Yellow) L5 Red LED, 5mm L6,L7 Green LED, 5mm PCBLAM# AB0310942, Bare PCB laminate, Lead/Tin solder finish, 5 layer R1,R13 470K AXIAL10 resistor R2,R18,R19 22K AXIAL10 resistor R3,R4,R5,R9,R10,R11 100K AXIAL10 resistor, 1% Pb/Sn finish parts supplied R6,R7,R12,R20,R21 10K AXIAL10 resistor, 1% Pb/Sn finish parts supplied R8,R16,R17 1M AXIAL10 resistor R14,R15,R23,R24,R25,R26 470R AXIAL10 resistor (May substitute 330R Pb/Sn finish) R22 10R AXIAL10 resistor VR1 LM7805CT TO-220 ROHS parts supplied T17 Probe, red. Please attach with 25cm stranded wire, not supplied Battery Snap To be attached to CN1, see above 6mm M3 machine screw and nut, to mount VR1 if required When completed and operational, upon connecting power the the game "rolls a new number" - with LEDs L1-L4 lighting as they cycle through all possibilities. The roll stops on one value, indicated in binary on LEDs L1-L4, labelled Bit0...Bit3 The object of the game is to quickly associate the 4 bit value displayed on LEDs L1-L4 with a number from 0-15 (Decimal) or 0-F (Hexadecimal), and touch the corresponding testpad T0-T15 with the Probe. If you select the correct answer, the green LEDs (L6-L7) will flash for as long as you touch the probe to the answer. If you select an incorrect answer, the red LED (L5) will light. After releasing the probe, the game "rolls a new number". If you find that your board is showing you predictable values, and does not seem to be random, it is likely that the oscillator formed by R18-C8 is too well matched to the time constant formed by R17-C6. The results can be made to seem more random by altering C8 (100nf) to another value (eg 1nf). My name is Steven Murray from AirBorn Electronics, thankyou very much for taking the time to read this documentation. I enjoyed designing this board, and I hope that you also find it enjoyable putting it together - visit our website if you like: http://www.airborn.com.au/client/navy/smdtrain.html