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Originally Posted by Mark McLeod
That circuit is incorrect.
Luckily the FET seems to be internally protected against hooking it up incorrectly or teams would have been burning them out right and left.
On the FET looking at the front (with the metal ground plate at the back)
pin 1 on the left goes to the white (signal) wire on the PWM cable from the EDU controller.
pin 2 goes to the negative side of the circuit you built.
pin 3 goes to the black PWM wire (common or ground) from the EDU controller.
You can see an updated circuit diagram Kevin Watson posted at http://kevin.org/frc/ beacon_transmitter_2.pdf
You can only see your circuit running with a digital camera, or by hooking up one of the IR sensors to a digital input like 6 and adding a printf to print the value of rc_dig_in06 in the beacon code. |
Unfortuantely, even with the wrong circuit, you will still see the LEDs glow in the camcorder, in fact, the circuit actually functions with the Source and Drain swapped, but the resistors get REALLY hot. ( I tested it with the IR reciever and a scope, and the signal is there, just not as clean and not as far a range)
So why won't First fix the document error?????