Subject:
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Re: RCX Output
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 16 Dec 1999 13:38:09 GMT
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Reply-To:
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TKING@TOGETHER.avoidspamNET
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Viewed:
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708 times
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The Rcx uses 3 H-Bridge chips whose spec sheet is at:
http://www.melexis.com/site/10402/f_10402.htm
The relevant specs are:
* Small package (SOIC16)
* Current limitation Low power consumption
* Over temperature protection
* Direct microcontroller compatible
This IC drives directly small DC electric motors.
It has 4 main driving modes:
In1 In2
1 0 Forward turning
0 1 Backward turning in opposite direction
1 1 Brake motor is shorted
0 0 Off motor is disabled
The current of each of the output drivers is limited to 500mA.
If the temperature of the chip exceeds 150 degC, a temperature protection
switches on, unconditionally disabling the outputs.
Motor current limit Vcc=9V 550 mA
Brake current Vcc=9V 240 mA
Nominal motor current Vcc=6V 220 mA
Motor current limit Vcc=6V 370 mA
Brake current Vcc=6 180 mA
Voltage drop on the output Vcc=9V 1.2 V
transistors 300mA
Voltage drop on the output Vcc=6V 1.2 V
transistors 200mA
** SO ** it looks 'fairly' idiot proof.
For trains: The DC Pulse Width signal is what is used on
several HO train controllers. Should work..
--
Regards,
Terry King ...In The Woods In Vermont
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Message is in Reply To:
 | | Re: RCX Output
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| F'amos ... multiple networked RCX's would get pretty expensive. You might want to consider a BASIC Stamp from Parallax or a BasicX device from NetMedia. (2 URLs) is if you can tolerate a train system that isn't 100% pure LEGO. Have fun, - Nick - (...) (25 years ago, 15-Dec-99, to lugnet.robotics)
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