--_003_6A364CF004354750A84D4384E0879249ivp1_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Josh, I don't think you'll have any problem with the pot yo-yoing or hunting. It will be very slow compared with the processing speed of the PIC and has no significant mechanical momentum to carry it on past a set point. The reduction gearbox means a pretty much instant stop Attached is what I use for a rotary pot controlled manually or with IR. The wiper goes to an 18F, but could also go to the 12F for feedback. It's a little slower than spec because of the voltage drops across the transistors, but that's not too important in my application Might not apply to your pot, but I notice in the Penny And Giles tech notes for the PGFM9000 series that the motor should NOT be driven against the end stops, so you'll need to address that. Rotary pots have a clutch Joe= --_003_6A364CF004354750A84D4384E0879249ivp1_ Content-Type: image/gif; name="ir_h-bridge_675.gif" Content-Description: ir_h-bridge_675.gif Content-Disposition: attachment; filename="ir_h-bridge_675.gif"; size=3394; creation-date="Wed, 30 May 2012 00:16:47 GMT"; modification-date="Wed, 30 May 2012 00:16:47 GMT" Content-Transfer-Encoding: base64 R0lGODlhsgHkAIAAAAAAAP///ywAAAAAsgHkAAAC/oyPqcvtD6OctNqLs968+w+G4kiW5omm6sq2 7gvH8kzX9o3n+s73/g8MCofEovGITCqXzKbzCY1Kp9SqCYAFBLQIrvULDou92wRZjE6rj+eyob2O y+e2rPdOz+v3MDycDxgoqOE3aHiI2IB38Jfo+KiXZQZJWWl5iZmpucnZ6fkJSmk3ihVqerojibrK Wtf6CvvSGEtb2zFrm6s7gbvr+zsJLDys0Et8HGuMvLyqzPwM6gw9vSlNHQRnfX277aR19t2toipO an6Onq6+Tsro/sbILj9PX29/j5+vv89vF6odgtyFcF3cUBA4AqGiUt4YKvkzqotDcqoifgEYkEM2 /gwYK0jryAPkDYgFDRIsswgeGJHccLCM8DHKSxok3c0CV/IizRwzH8SE0lMGxIhDJebUOSNoyxM/ nyjtw4DMyQU4Va7cydHqFn8WnlI9KLNJTXg3g3kNibUrl40DUzT1JjZqyUJk3539IHWiQ59pwa7V ivHuUQiCZcWlyvWN3jsTfTSuq1VRX15upnYsHJmv081xTtJFKRAdVI8q9xrs6hbsOySYW7RGa9Wz SdgH/cnO0Prt64RTdvNcLTvl76woV7dF8dMiEd+uOwOfLdwl7tKZVTO1ftpx9CuDSzAOkzK4cenk r1Me34Ohb6kr1jIfrZjx39jn4LuSG0++hLdf/rcqdFEKc+y1t9Ul7xUzXDHhzUYYdgoGk5RpqaHH lISOHAjhfZMs6Edo9SFmzoZmUVghR/tIpM9AGCaxIokxNMKhTS5yMyCDLFgIEyHdObhfi2xMBuRz kBVXnQfzxWZcP/MQx2R2pKmlpDpABSmUZEh+dpdFNdZ4RWA6ztigWshNmVSCCF4pY5EgCOfejiLg GGaTIAEEJ15kVlnemfHlh2R87YD4J4TgWOZWnVZS6cB/GXEGIJgEOsnbeXYiN9V+Glpq6FKspTPO drIcyZ2kRhaqJn6I9pepRp3cViWo3vG4QW6eHlqmpYqNyUSI49hYa26wftmcrae6GaomR/po/teE wo5qWI4mBopanDc6lSpeXCFLHa7LahpsWR7hqGiiVmKIba6O7grpm79O92Kd1ijz7kIrlrvErI2m u+i2qrbrrb7iimpGtZH+Y+arAO/7qbsHS6sZoPZ9Qm+pk/oL7Iv/Mrxwfxo/jEaUHn/Mz5MUs4un qRdTyFbDemZIkcAnpxGxDvFmTLLFtN5coFEr44xyjBI7u0bMBWP8MsI2mxywhaaBGy6MCPoMmsvn 9pbIzCM3yTGxrg5ZabJIuwk1qzQjVbPKA0dWVdFmrx0rTUPVtNFnI4KImKlY8nq1FSI5U1jaaBOd aD358ntPdX9tXRo+dqdJJL48g/flNy0f/u44sN+12ctL4U7cblTgGg4Z3J5nM9bd9j5+FbsBcg2a wZXd2ibbx5lX8sZzj4j461+TmJd+eAOtxpzZVtp1RmEDHi3tR9uOYsqzJrYzsegGHTl1OPVto9i7 z17s8tEzv+D34leubfAkzyceZgOunrPa3LvufYaoA4+6j0JPnzz6ezYOf4GYIy+y7nEOF/2SHQC1 prKn3E9ZhpiJr9QFpgIacH7yk95pFCiHBV7qW6I52wAnyJ8Jjo+AFnxfx6q2nLPdRIIHnJqLFObC sekNhYSAFgSh1EE/5ZB5hGGaNmC0juZ9KIAwo6EQvESrFboPJroiXwXjcTIW0u+EiNCc/tRMeDUu 8TCGRDQgCWdEpwwaERtYYxkIBbjEL5YqjM6pYgqxmKQz1sBpUVyiHWfoxiEgkVtPTBpuPKQe/2ix YjKsggbn+MbkGW18OoPfIMuWN0OOEQh7XGQfC4K9ODKri2OY5A/4xilIWtB3N7xgDXd4R0nm8Yin kuAVR2Y/Ma6SjLVRjihfKCIPlrCHtmxhQwI5S0q20lZnoWP8qOC3QRySkfLa5BYvyTlo1lKRqtzl HJYpTQYy04lGe+S0VkIRTzpmmIjU5DHxiM3aCbNW21ta97z5KCqm85y0oWe6EmOMlCXRmv0biSCF l639CZJPkNNjK0lnmwZdz4vs/I0W/jeHIiHprnHzbJtBG6qgKElUPr20pi0nR1AtoYVLpxtXLrNT UUJ+EqMPyqgk2vAf4nFzl+tjnNhKarGPZvNMztupuS6atT7i85n6XFccXZmTBRIkmYozSYAQklKV jjOoQk3mz7BIQKJ4rpGmTAWvrBqmhW6TUbS8ly9TCccCFm88bBopW7nYp4nC9SGJLNFV73ozkAp0 e049ylr/hlK3svWVF3xMfghbhJS+BpiRTKBNfye92AEGTawLbBsPodhOzRSv7Typ8Pby0cUQ1LLU C+ZKC/VDpCmtpbeC7DTLV0TTTpVSaT3sFsW62a3CloqYrWuXamvDIuGWJYg1Kh57/gtUHC5JuU2l LEXRao9bpg65rCxj4Nb0z3yKdq/P5KoI0Uq1TjE2NBH95/60BNGx+tO6C8Gun+J53cbylWzaWqpd oBZX1551g8b1ozPbt9uMFpKC1awv/4aESaFy1qf8HTAUo5oVgV1GlsoKx1gwWRHyvpeT6ZFu3XL7 3XtJ2MPHpVQgLxzQuBZ1v+WEo25BPF/4jJi904XtWtOGY+FyuJ47nuJ5hDZhGtNXeRNt61tTjFMG t5iaTMaUki0J47kumKxEJqVTXypgtF0xs0ImZm2ejLDcObi7JVamb/vLxI8YNp7pZTGY4SLbDne5 R2E8kJXnTOBfSrmTye0xnemE/izoudjNrPEadcvaZDxn2Z5ojrEUxLyHqAYZytXl45gPA+FvnvnS eeaxRQd9p0zDF9F+5nRaejJp+ooaf+sEdaPXG2X1kpnKg+KobYfcHsZyN9Uh9e+bSwZTXfvn15Cq iK95cWLfLVVCbRapkBax6kTTjlD55aTctiPpI/MvfFhlnH41JjnWjTepsxturH/UqspOGYyvwzaL JEO5yQrZvkluJLSxrENtS6qngkZm54gUHV631r6ZAZnBQxmw0Onb2vGu9+3EAzohLvfKAyV2nxsF WoUInCy9E1BxI9xxWYsv3LcWFsmXnb2FAw23Ii90umE6a55ZuOWWHlPXVryw/pk/2dh62bY7170l wJ670prWubvlJKNjmfW/5Ca4k1JdCKWTmM5YC+exC3wjYLoH5mU0dmU+ruixeX3rNEfP2Lkr7VEL oqIbl3M0Ke1jPh96tmn3qnuZbuo7NfDieWf0sMAb3rmf1tWwdnvdsb72Tcu3DwjPU6n9HWdP913w k6+XOA3/+Ah1NOyTj7ZUAcFlwkP+7ocf/d75vnjNkx7vqde7mVEf94Ku/tVhibzdRS+KqZv+9UTP fO457/rEm1fyrb+Q7gN/+j1rk/aPaHuNeb9utVfe8oPzfe0PvUznP7/msZfJmqGf/eMjn/XdZxSk I6F8VjM/+HAnNPU9j2xb/u/V4X7v9O9xnyv6vzugrNJ/s/DffOIHZ/DHMBD3bbdnfZBQSQVFgGxz N9GnTml2CmxENq4yOWBFGy/ldVd2cB3ogR8IgiHYD+LFcb1GdlfXTPJWZFDUezJVbaQWgLoEaycH HVL3givnWQjWahYoUb2ngDLoEuGTUPkmdPsGbjpISd83bOkXLAZSSlNlOiiTNIJDH5KjdbIHg78Q fiUIcP2ncnHCcsNXZoM3DNjEc5dTWDmmSNDmaIfhg1qYWLdAWLXGO7LXZvVHC9nGUoFggzKTCRjk hHmUTg3YhG8Xg8jVb453f4ZofILIhP30g9UXieAkf4Dlf9LnC4SIidcn/nU/d4nqB4eBWGbpIyhg h0ahaAmauDvcBoH/V4aYoIrg9lSgZXGuYYrmI4mHiHXFU2si6Iu/CIzB2HiLWE2Ig4HisH7NMAZK SFrICHysEIuz54zT+IiIR43UGI2MeI3IOC+1CITbWA7eA2TgmIDQCGyjdYe5SI729wotwobqtonr WHaoEEt54V3xKI/81I5lwnXVWI5VlIj52H7484Ca5gnwJJDP+IR6VYirMhfjZmEMmY/ZSH6wqFXi pnSf+AwUyX2wmGDi9myacwzCSJL5QDCPVZAIWXwJuZLdwB50wT7QkX4c6ZAseViktDpCCHY0mYrM aJM/GWqtCJRD6Xbn7UeUR5lYPomUSwlURsmUT3l7TgmVJIBzU9knPNkZGbaB+ZWOH+ltVlleQ0cN 19Y+6sGKLjVUKhZcT4mVpbVtZalzYqmDfwWWbYmLUXNiz7VhUmWXjQiU14ImXiiUYPlnTTSRglIX gimXhMmYO/OONqiR/miThimQfkNwbLKTt9iYm/kmmvmTXcmZsRKQoUmaWQeapYma6piaqxlgrOma kPiaU9k7gxlisTmUhkWXHWmbROmFUll6u/mXz5GbnwecSMkhfVmcsBAjyJmc5hiYzQmdUXSF0Umd 1Wmd14md2amd28md3emd3wme21gAAAA7 --_003_6A364CF004354750A84D4384E0879249ivp1_ Content-Type: text/plain; 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