1	2010 East Coast Large Scale Train Show
2	Objectives Demonstrate various devices & projects that utilize microcontroller operation … … and some that do not! (Hopefully) Excite you with the possibilities and enable you to begin experimenting!
3	LEDs LEDs have become a major lighting source in the last few years They are bright enough to be used as headlights on our model locomotives Their cost and power consumption makes them the ideal light source for model railroads
4	LEDs Groups of LEDs can be configured to do some remarkable things …like creating a realistic Mars light
5	LEDs … or ditch lights
6	LEDs Or even a headlight that is too bright to view directly That can turn into a single bulb Mars light
7	LEDs Some new LEDs have three or more diode junctions on one housing to increase brightness and bring down the cost!
8	LEDs Small supercaps can keep LEDs shining for many minutes after they are removed from track power
9	LED Trick Flashing LEDs have a built in circuit that causes them to flash when power is applied (<$1.00 each @ AllElectronics.com) Use one flashing LED to flash several non-flashing LEDs
10	Tip #0 Rare Earth Magnets Magnets are used to activate reed switches and for many other things on our railroads Two super sources: http://www.dealextreme.com/details.dx/sku.5962 (20 @ 10mmx1mm for $2.69 delivered) http://kjmagnetics.com/ for just about any size / shape / strength you might need
11	Tip #1 Latching Reed Switches LEDs in cars and buildings can be turned on or off with Latching Reed Switches Bring a magnet near one end and the switch closes & stays closed Bring a magnet near the other end and the switch opens These unusual devices use NO POWER when the are off
12	“Drilling” LEDs
13	“Drilling” LEDs The difference in brightness while viewing from the side can be dramatic
14	“Drilling” LEDs
15	“Warm” White LEDs
16	Care and Feeding of LEDs LEDs are current driven devices If you don’t limit current they will burn themselves up A current limiting resistor keeps the current down even as the voltage increases See TrainElectronics.com articles on LEDs for details!
17	Tip #2 - Connectors We are always looking for ways to connect electrical devices together For low current use: Deal Extreme item # 15234 $2.78 for 10 pair including shipping!
18	Animation
19	Animation - Servos
20	Animation - Servos
21	Animation - Servos
22	Animation - Servos
23	Animation - Servos
24	Animation - Servos
25	Animation - Servos
26	Animation - Servos
27	Animation - Servos
28	Animation
29	Animation
30	Animation
31	Animation
32	Tip #3 – Connectors Connectors: High current for track and battery connections: Deal Extreme item # 10788 $6.26 for 10 pair including shipping!
33	Animation
34	New USB / MP3 System
35	New USB / MP3 System
36	New USB / MP3 System
37	Even Newer MP3 System
38	Tip #4 - Adhesive Great for quick temporary or permanent connections Similar to the “goo” on the back of a new credit card I use it in place of hot melt glue DOTS or ZOTS brand Michaels (don’t forget the 40% off coupon!)
39	Animation – Timers
40	Public Layout Start/Stop
41	Animation - Timers
42	Tip #5a Soldering
43	Tip #5b Soldering
44	Dual-Coil Latching Relays Have two coils instead of one Each coil pulls the contacts one way and leaves them there Once latched one way or the other no power is needed to keep the contacts set as they are Only a brief pulse of power is needed
45	Dual-Coil Latching Relays Can be used to make a “non-electronic” point-to-point controller
46	Diode Speed Control Pairs of back-to-back diodes can be used to slow DC motors Each pair drops the voltage by about 0.7 volts This circuit can be adjusted to drop from 0 to 4.9 volts
47	Dual-Coil Latching Relays Can be used to make a reverse loop controller
48	Dual-Coil Latching Relays Can be used to make a wye controller
49	Your Ideas? Questions?
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