I used to use the Allegro 5832 pull-down driver. It had a 32 bit shift register, latch, and high current drivers. It's long discontinued, though. Also, it was pull down only. Allegro has no replacement. Also, they were pull down only, so they would not work with your two color LEDs (though you could use two outputs with a pull-up resistor on each end). Good luck! Harold > On Sun, Jan 15, 2017 at 07:17:05AM +1000, David Duffy (AVD) wrote: >> I'm not aware of any PICs that can swing their outputs more than 5V. >> David... > > David, > > There's no need for more than a 5V swing as long as you are using 2 pin > bi-color LEDs and the forward voltage of both isn't more than 2.5 volts. > > It just takes a small trick. What you do is tie one end of the LED to a > 2.5V rail and the other end to a PIC I/O pin. You can get all three state= s > from a single pin: > > 0V output turns on one color LED > 5V output turns on the other color LED > input turns the LED off. > > If you have a lot of LEDs, you can create a 2.5V rail using a power > supply. > For a few LEDs a stiff voltage divider will do. > > BAJ > >> >> On 14/01/2017 2:16 PM, Anthony Nixon wrote: >> > A surface mount PIC cannot do the job ?? >> > >> > cheers >> > >> > Tony >> > >> > On Sat, Jan 14, 2017 at 9:26 AM, David Duffy (AVD) >> > wrote: >> >> I have an idea for a project that needs to drive 8 outputs for >> (remotely >> >> mounted) 2-pin bi-colour LEDs. >> >> >> >> Since the LEDs are 2-pin, I'll need to reverse the polarity on them >> >> individually. There may be 1 or 2 LEDs on each output, so if they >> were >> >> in series that means I need a swing of more than 5V. >> >> >> >> I was thinking of two shift registers arranged as 8 H-bridges, but >> can't >> >> seem to find any that have a Vdd of more than 5V and have an output >> >> current of more than a couple of mA. >> >> >> >> There are H-bridges out there, but the cost and space adds up pretty >> >> quickly for 8 outputs. Ideally I'd like nothing finer pitch than a >> SOIC >> >> package. >> >> >> >> Any ideas? >> >> >> >> >> -- >> ___________________________________________ >> David Duffy Audio Visual Devices P/L >> Unit 8, 10 Hook St, Capalaba 4157 Australia >> Ph: +61 7 38235717 Fax: +61 7 38234717 >> Our Web Site: www.audiovisualdevices.com.au >> ___________________________________________ >> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist > > -- > Byron A. Jeff > Associate Professor: Department of Computer Science and Information > Technology > College of Information and Mathematical Sciences > Clayton State University > http://faculty.clayton.edu/bjeff > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .