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MMD > Archives > December 2020 > 2020.12.01 > 03Prev  Next

Speed Control for Electric Suction Box
By John A. Tuttle

Hi All, With regards to John McClelland's recent posting about
the speed control for the PPCo vacuum pump kit (MMDigest 20.11.28),
the schematic he provided shows the "interactive" circuit that many
people have complained about for many years. In order for the circuit
to have two "independent" settings, R2 and R3 cannot be wired in
parallel. Here is a schematic of a controller with two completely
independent settings.

John A Tuttle

 [ Dual-Speed Controller

(Message sent Wed 2 Dec 2020, 01:21:53 GMT, from time zone GMT-0800.)

Key Words in Subject:  Box, Control, Electric, Speed, Suction

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