electonics specification

-Have five 100uf capacitor part number 11-3087 costing £0.05 for 1+ from www.rapidonline.com. They will be used in series with the 10k resistor that is connected to pin 6 and 7 of the monostable 555.

-Have twenty nine 360 ohms resistor part number 62-2325 costing £0.17 for 1+ and £0.15 for 50+ from www.rapidonline.com. They will be used as protective resistors for the test points in the circuit where the LED's are. Also used as protective resistors for the two 7 segment LED displays.

-Have five 47uf capacitor's part number 63-2320 costing £0.17 for 1+ from www.rapidonline.com. They will be connected to the astable 555 on pin 2.

-Have five 1k resistors part number 63-2331 costing £0.17 for 1+ from www.rapidonline.com. They will be connected between pin 6 and 7 of the astable 555 and in series with a 10k variable resistor.

-Have five 10k variable resistors part number UH03D costing £0.31 from www.maplin.co.uk. They will be used on the pin 7 of the astable 555.

-Have two 4020B 14 Stage binary counters part number 83-0346 costing £0.36 from www.rapidonline.com. They will be used to control the two 7 segment displays.

-Have fifteen LED's 5mm part number 56-1250 from www.rapidonline.com costing £0.11 for 1+ and £0.088 for 100+ that will be on all the time to keep the light intensity of the LDR's constant. Also will be used at the test points to show if the circuit is working or not.

- Have two red 7-digit LED displays part number 57-0169 from www.rapidonline.com costing £0.29 for 1+ that will be used to show the points counted.

GCSE Electronic Products

-Have a Double pole, single throw latching, and slide switch, part number 76-0100 that costing £0.11 for 1+, that will be used for an on/off switch of the whole circuit.

-Have a black push to make switch part number 78-1522 costing £0.30 for 1+ from www.rapidonline.com. That will be used to reset the LED displays.

-Have a battery holder from www.rapidonline.com part number 18-0163 costing £0.18 for 1+ that will hold a 9V battery with the purpose of powering the circuit.

-Have four printed circuit board stand-offs from www.rapidonline.com part number 26-5873 costing £0.24 each that will be used to hold the circuit off the housing floor so that is doesn't move around in the box and will protect it from short circuiting with metal that may touch the soldered joints.

-Have a pine wood panel from www.diy.com part number SW-COC-003240 costing £14.98 that will be used as the material that will make the sides of the box, used for housing my circuit. It is 1750mm in length x 200mm width x 22mm height the website www.diy.com is for the shop B & Q therefore can be bought at the shop instead of online.

-Have wood glue from www.diy.com it has no part number but is called 'B&Q general purpose wood glue BQ05 50ml' costing £1.98. It will be used with nails to create butt joins that will hold together the pine wood to create the box used for housing. This will make the joints strong; therefore will be able to remain joined if it's dropped.

-Have two-hundred nails 15mm long from www.wickes.co.uk part number 156649 costing £1.79 per 100g, that will be used to join the box together and then used as the pins in the centre of the game that the ball bounces on before going into a column.

-Have a 9 volt battery from www.maplin.co.uk part number N71BT costing £2.99, that will be used to power all of my circuit. It will be put into the battery holder I mentioned before.

-Have ten 10mm screws from www.maplin.co.uk part number N98CR costing £2.99, that will be used to hold down the plastic cover that blocks light getting to the LDR's, also to hold the base of the box so that it can be opened if the circuit needs to be accessed.

-Have four terminal blocks from www.maplin.co.uk part number RH76H costing 0.49 each. They will be used to hold the wires from the LDR's, Led's, battery and switches.

-Have a PCB board from www.maplin.co.uk part number BW19V costing £3.34 each. It will be used to build my circuit on.

-Have four self adhesive PCB pillars from www.rapidonline.com part number 33-2130 costing £2.10 for a pack of 25. They will be used to hold the circuit to the housing.

-Have ten tie wraps from www.maplin.co.uk part number NL18U costing £5.99 for a pack of 1000. They will be used to hold the wires together.

-Have a battery holder from www.maplin.co.uk part number CK65V costing £1.29. It will be used to hold the 9V PP3 battery.