Speed 400 Speed Controller

Speed 400 Speed Control

Updates

15 July 1998

The initial web site is operational.

29 August 1998

I added two optional changes to the design.:

I added an optional RF suppression capacitor (C5 on the schematic) to eliminate a problem in some installations. In these installations, placing the transmitter antenna in very close proximity to the aircraft would sometimes cause the motor to run. NOTE: This problem has only been seen with 72 MHz systems. A friend of mine is running one in the 6 meter amateur radio band, and has never seen the problem.
I added an option for a 1A BEC regulator. As explained in the description of the option, the 1/2A design is lower risk if the lower current is enough. However, one of my correspondents feels that it is much more useful with the 1A capability, and tells me that many commercial speed controllers use this regulator. I am currently flying with the 1A design and am having no problems.

I have also made public an offer to sell pre-programmed PIC processors and surface-mount capacitors; see the parts list for a description of the offer.

30 October 2001

The offer to sell pre-programmed PIC processors has been withdrawn. When they sterilize the mail, it will destroy the chips.

May be copied as desired and modified as needed so long as this copyright notice is preserved.

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