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Hi, can the HCTL-2020(quadrature Decoder/counter interface IC) be replaced by the SN754410 chips? Furthermore, is it possible to be running two motors with one basicx-24 chip? If i were to use the HCTL chip, one HCTL chip requires two feedback lines from the encoder wheel back to the BX-24. That would mean i need 4 lines back into the BX-24. Is that possible? Is it also possible to use the SN754410 chip driving 2 motors? How many output lines does that require (i.e how many channels)? how many motors can one SN754410 chip drive? What do you guys recommend? Lastly, dose anyone out there have any circuit diagrams which i can reference? Thanks! Dexton

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wrote: > > Hi, can the HCTL-2020(quadrature Decoder/counter interface IC) be > replaced by the SN754410 chips? Furthermore, is it possible to be > running two motors with one basicx-24 chip? If i were to use the HCTL > chip, one HCTL chip requires two feedback lines from the encoder > wheel back to the BX-24. That would mean i need 4 lines back into the > BX-24. Is that possible? Is it also possible to use the SN754410 chip > driving 2 motors? The SN754410 can drive two motors in forward or reverse or 4 motors in a single direction (not steper motors of course). Two motors forward and reverse requires either 4 lines or two lines and an inverter chip (or transistors?) Four motors in one direction would require 4 lines for independent control of each. It's a pretty good chip. I use it to power my tank robot. Be sure to heat sink it or have a large copper patch under it on the PC board to dissipate heat. It can get quite hot depending on your load. > How many output lines does that require (i.e how > many channels)? how many motors can one SN754410 chip drive? What do > you guys recommend? > Lastly, dose anyone out there have any circuit diagrams which i can > reference? Thanks! The datasheet has a pretty complete explanation. All you really need to add are diodes for the voltage spikes caused by stopping the motor. Stuart Leslie

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