DC Motor control

DC Motor control

This topic has 2 replies, 2 voices, and was last updated 11 June 2015 at 08:08 by Neil Wyatt.

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11 June 2015 at 05:25 #38791
Grumpy
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@grumpy72061
Figure 4 schematic is incorrectly drawn
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11 June 2015 at 05:25 #193008
Grumpy
Participant
@grumpy72061
In figure 4 , page 32 of issue 229 of Model Engineers Workshop the symbol for TR2 (BC 327 ) is shown as an NPN transistor rather than a PNP. This will not affect the actual circuit as the terminals are the same in both cases, but it makes the explanation of how the circuit works difficult to understand. As drawn, both transistors would turn on and of at the same time. When in reality a signal to the base will turn BC337 ON and turn BC327 OFF at the the same time.
11 June 2015 at 08:08 #193011
Neil Wyatt
Moderator
@neilwyatt
You're late

http://www.model-engineer.co.uk/forums/postings.asp?th=107273

Neil

Edited By Neil Wyatt on 11/06/2015 08:09:05
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