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Spockie-Tech
Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
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Only what I already said.. rememebr they can only go down in voltage, not up.
If you want 5v, or 12v, your better off using a 7805 or 7812 (the last 2 digits is the output voltage) regulator, since they dont require any external resistors to set the output voltage, so are heaps easier to use. just attach voltage in, ground, and out comes the voltage you want (Vin > Vout+2),
If you need some weird voltage like 13.8v or 6v, then the adjustable (LM317/350) series are appropriate. but for 5, 12 and 15 the 78xx series are cheap, easy and reliable.
The 18X is a more powerful chip than the 08m. I used the 18x in the relay controller that was driving Vincent at RoboWars. it works quite well, I may have thought of a new technique to improve the failsafe safety and immunity to noise at the same time, but still have to do some testing.
The PicAxe's arent that fast however (compared to a machine code PIC), so I dont know if you will get good response time if you attempt to do dual PWM outputs as well as mixing on multiple channels at the same time. The 3 channel relay decoding works well enough, but I think ots just on the edge of keeping up. if you try and do mixed PWM in the code of a single chip as well, it might get a bit sluggish. _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
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Fri Jan 07, 2005 10:23 am |
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