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Old Nov 12, 2010, 05:19 PM
IBCrazy is offline
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Amherst, VA
Joined Jun 2006
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Building the Tracker – Making the control board

The first thing to do is to make the control board. How you solder it is up to you. Below is a components list. All of these parts are common parts that can be bought from www.Jameco.com, www.Alliedelec.com, or even Ebay.

1- PCB board (5X7 cm, .1" hole spacing works well)
1 - uA 7805 voltage regulator
1 – LM393 voltage comparator
1 – LM358 OpAmp
2 – 555 timer (NE555N or similar – Optionally, you can use a single 556 timer as well)
2 – 10uF electrolytic capacitor
1 - 4.7uF Capacitor
1 – 1 uF capacitor
2 – 100K potentiometers
1 – 1 MegOhm potentiometer
1 – 270K resistor
2 – 22K resistors
6 – 15K resistors
2 – 2K resistor
1 – 390 ohm resistor
2 – 1N4148 Diode
1 – TO-220 heatsink (for the voltage regulator)
1 – Standard size servo (the slower and deeper gearing, the better)
3 – standard RX units (or just two and one spare module) SUNSKY and BOB TX’s WILL NOT WORK! YOU NEED A STANDARD RX SUCH AS THE ONES FROM WWW.NGHOBBIES.COM , WWW.DPCAV.COM OR WWW.READYMADERC.COM


EDIT: Updated with a revised schematic that limits the oscillations a bit better. I also updated the parts list to reflect this.
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Last edited by IBCrazy; Nov 22, 2010 at 01:37 PM.
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