 | | Re: 5VDC Voltage Regulation —Wes Matchett
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| | | This indeed does work fine, with he proper resistor. :) Voltage across the coil is now 4.74VDC. Thanks to all for the input - when I get a working model I'll put it on my web site. -Wes (...) (25 years ago, 27-Sep-99, to lugnet.robotics)
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| | | | | Re: 5VDC Voltage Regulation —Jacob Schultz
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| | | | | Don't forget to apply a reverse biased diode across the relay. If you forget this the coil will generate large voltage spikes when the power is removed. This may hurt your RCX. (25 years ago, 27-Sep-99, to lugnet.robotics)
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| | | | | Re: 5VDC Voltage Regulation —Jacob Schultz
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| | | | (...) Rubbish. The same happens for motors, and the RCX handles this. (25 years ago, 27-Sep-99, to lugnet.robotics)
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| | | | | | RE: 5VDC Voltage Regulation —Carl Schaefer
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| | | | Man, don't sugar coat it .... Say what you really mean. (...) (25 years ago, 27-Sep-99, to lugnet.robotics)
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| | | | | | Re: 5VDC Voltage Regulation —Jacob Schultz
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| | | | (...) OK. What I was thinking of was that if a current flows through a coil, that be a relay, transformer or motor, the current can't change at an instant. If you break the circuit current will keep running through the coil for a short time. This (...) (25 years ago, 28-Sep-99, to lugnet.robotics)
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| | | | | | Re: 5VDC Voltage Regulation —Michael Gasperi
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| | | | Jacob Schultz <dungeonmaster@get2net.dk> wrote in message news:FIrMLo.H8K@lugnet.com... (...) A "freewheeling" diode is a good idea generally, but the RCX must already have diodes built into the driver IC. It has to turn on and off the motor (...) (25 years ago, 28-Sep-99, to lugnet.robotics)
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| | | | | | Re: 5VDC Voltage Regulation —Dennis Clark
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| | | | (...) You can't have the diodes on the motor because it goes in both directions. If you put a diode out there, you would have a dead short in one of the directions. Such things need to be built into the H-bridge, not the motor leads. So, I seriously (...) (25 years ago, 28-Sep-99, to lugnet.robotics)
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