Slide 1

LED Dice Elizabeth Brooks, MatE

Slide 2

The device will roll and a sequence of LEDs will light in the shape of a dice number.

Slide 3

Item #Qty.Reference Designator TypeValue/ Part #Package TypeManufacturerManufacturer Part# 11C1 monoblock capacitor470 nFthrough-holestandard 21C2 monoblock capacitor100 nFthrough-holestandard 31C3 electrolytic capacitor100 F 16Vthrough-holestandard 41D10diode1N4148axialstandard 57 D1, D2, D3, D4, D5, D6, D7LED's5 mmthrough-hole Vishay Semiconductors751-1118-ND 61U1OSC Mono Timing IC555 ICDip-8Stmicroelectronics497-1963-5-ND 71U2Decade Counter IC14017 ICDip-16Stmicroelectronics497-1350-5-ND 82Q1, Q5pnp transistorBC557through-holeOn Semiconductor BC557BRL100SCT- ND 93Q2, Q3, Q4npn transistorBC547through-hole Fairchild SemiconductorBC547BFS-ND 101S2hat keyswitchPCB- mountedstandard 111S1SPDT switchPCB- mountedstandard 123R14, R15, R16resistor220 axialstandard 131R13resistor270 axialstandard 148 R5, R6, R7, R8, R9, R10, R11, R12resistor10 kaxialstandard 151R3resistor100 kaxialstandard 161R2resistor10 megaaxialstandard 172R1, R4resistor3.3 megaaxialstandard 181J19V battery snapstandard

Slide 4

The PCB was designed in DipTrace.

Slide 5

The components were soldered on to the PCB.

Slide 6

Recommendations for improvement IC Width modification Schematic simplification Switch placement Overall dimensions Larger mounting holes