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Topic: Supply 24V using a dual-motor controller 12V (Read 1 time) previous topic - next topic

xanok

Hi!
I bought one of these "L298N Dual H Bridge DC stepper Motor Driver Board module"
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220793677780&ssPageName=STRK:MEWNX:IT
My plan is to use it in a solenoid push/pull.
but I can provide 24V to the solenoid by placing the outputs (12V each) in series? Or will I have a problem?

Like...
http://imgs.inkfrog.com/pix/ivanchang735/2_011.jpg
output1 - connected to solenoid (+)
output2 + output3 - connected together
output4 - conected to solenoid (-)

then I put output1 as 12V, output2 as GND, output3 as 12V and output4 as GND???

Thanks

cr0sh

I've never seen an L298 used in that manner; I doubt it would work, because if it did, such an application would be described in the datasheet for the device (you would do well to read it, too). It is possible with the L298 (and with that board, if the schematic is accurate) to operate in "bridge mode", to double the current output of the L298 (to about 4 amps) - so in other words you can control either 2 x 2A (max) DC motors, or a single 4A (max) DC motor (or use the L298 to drive a single bipolar stepper, of course). Doubling the voltage, though? I don't think that will work...
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

xanok

#2
Aug 08, 2011, 06:06 am Last Edit: Aug 08, 2011, 06:08 am by xanok Reason: 1

I've never seen an L298 used in that manner; I doubt it would work, because if it did, such an application would be described in the datasheet for the device (you would do well to read it, too). It is possible with the L298 (and with that board, if the schematic is accurate) to operate in "bridge mode", to double the current output of the L298 (to about 4 amps) - so in other words you can control either 2 x 2A (max) DC motors, or a single 4A (max) DC motor (or use the L298 to drive a single bipolar stepper, of course). Doubling the voltage, though? I don't think that will work...


Hey cr0sh, thanks for reply
Yes, I read that could "double the current" when you put the outputs in parallel.
I looked into the datasheet, is not really about increasing the V that way.
I am very afraid to make that connection. I do not think I will. xD
The best would be to connecting two batteries in series, and then put the 24V in the driver, isnt it?

MarkT



output1 - connected to solenoid (+)
output2 + output3 - connected together
output4 - conected to solenoid (-)

then I put output1 as 12V, output2 as GND, output3 as 12V and output4 as GND???

Thanks

output2 = GND, output3 = 12V, you connect output2 and output3 together... What do _you_ think will happen? 
[ I won't respond to messages, use the forum please ]

xanok

Sum of the Vs or Big BOOM, thats why Im asking =P

Grumpy_Mike



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