See more projects using micros:
Pic A PIC Project

This is the second project to control a point motor automatically and this design converts a manual set of points to automatic, by using a SERVO.
A SERVO is a motor and gearbox with an output that rotates up to 270 degrees.
You need to read all the previous article IR MOTOR CONTROLLER MkI to get all the background details.

INFRA-RED POINT MOTOR CONTROLLER MkII

These features are contained in our simple design and can be built in an evening on Matrix Board. A kit of components is available from Talking Electronics as well as a pre-programmed microcontroller.

Features:

• Operates point motor using a SERVO (PWM control).
• Operates point motor alternatively “ahead” or “siding”
• Operates Servo for oncoming train to prevent “point-derailment”
• On-board LEDs indicate “ahead” or “siding”

RUNNN

IR Point Motor Controller MkII Parts List

Cost: au$25.00 plus postage
[Kits are available](mailto:colin@elechelp.com?Subject=Buying LED FX kit&Body=Please e-mail the cost LED FX kit by air mail to my country:****___**** and send details of how I can pay for it. My name is:____)

• 1 - 180R

• 2 - 220R

• 1 - 330R

• 2 - 2k2 resistors

• 2 - 22k

• 1 - 100n SM capacitor

• 1 - 100u electrolytic

• 2 - 1,000u 25v electrolytics

• 1 - 1N4004 diode

• 1 - LM78L05 voltage regulator

• 1 - 3mm red LED

• 1 - 3mm green LED

• 2 - IR emitter LEDs

• 2 - IR receiver transistors

• 2 - BD679 Darlington transistors

• 1 - PIC12F629 chip (with routine)

• 1 - 8 pin IC socket

• 1 - 2m fine screened lead (for testing)

• 3 - 20cm hookup wire (for testing)

• 3 - 2-way terminal blocks

• 1 - 20cm very fine solder

• 2 - Surface Mount PC boards (for train detector pair)

• 1 - miniature SERVO

• 1 - IR Point Motor Controller MkII PC board