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Forum Index : Microcontroller and PC projects : Invert ttl
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vk4tec Senior Member  Joined: 24/03/2012 Location: AustraliaPosts: 239 |
Hello Duinomite mini Is it possible to use the pic32 to invert TTL serial ? I think you use a comparator and come back out again ? Firmware ? Basic command ? Pin assignment ? TTL GPS not uart compatible need to invert Andrew Andrew Rich VK4TEC www.tech-software.net |
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bigmik Guru  Joined: 20/06/2011 Location: AustraliaPosts: 2914 |
Hi Andrew, To Read/Write/Both? TTL levels required or 3.3v levels. Regards, Mick Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<< |
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boss Senior Member Joined: 19/08/2011 Location: CanadaPosts: 268 |
Hi Andrew, the easiest way to invert signal polarity is using a npn transistor ie 2N3904 with a collector resistor 4k7 to 10k connected to +3.3V and ~ 10k resisor coonted between GPS Tx and trasistor base. This will work as signal inerter and voltage level converter as well. Hope this helps Regads, boss |
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