Keith

Most definitely, been over the PCB like a very nasty rash. I'm beginning to conclude that it is something to do with a 74HCT14 a hex inverter with Schmitt-trigger inputs used to interface a couple of analogue inputs. Jury is still out on this.

Im using a 16F18346 20 pin in an SOIC package in a new project. everything works fine on the breadboards but now that I have the PCB and built it up for no apparent reason the chip begins to consume about 350 - 400mA and then burns up. If I didn't know better I would swear they were low power versions (16L18346) it's the only sensible conclusion I can think of. I have disconnected all I/O ports to the device.

Mmm.... Yes. I wonder how many folks have sat back and said, "I'm glad he has asked that question" Sometimes it is wiser to keep your mouth shut and look stupid than to open it and remove all doubt.

Something that has had me puzzled for donkeys but never got round to asking about it. Where is the Oscal value derived from? Occasionally I'll screw up the value and how I get round it is by reading the value from another device of the same ilk and reprogram the same onto the device which I have screwed up... It works but it isn't the right way to do it.

Another problem. In the demo code it refers to the following: #define GLCD_Enable PORTA.1 'example port setting #define GLCD_RS PORTa.0 'example port setting #define GLCD_RW PORTA.2 'example port setting #define GLCD_RESET PORTA.3 'example port setting #define GLCD_DATA_PORT PORTD 'example port setting The issue is with the final definition, " #define GLCD_DATA_PORT PORTD" I'm not too sure about this port D issue, as soon as I allocate GLCD_DATA_PORT to a physical port, i,e, C.5 the glcd_st7920.inc...

Great ! That compiles okay - Thank you. Forever in your debt Sir.....

My next project is a small Surface Grinder which has three axis motorised tables, X, Y, and Z. I am using a and 16F18875,32 40 pin device to control the three stepper motors, 3 position DRO's, the limit switches and the grinder motor. I was not expecting problems as early on in the project as this, but frankly the compilation errors have me baffled. The demo code is directly from the Great Cow BASIC documentation, GLCD Overview under 'ST7920 Controllers' The Errors are as follows >>> WARNINGs / ERRORs...

Oh, I forgot about that. It is another Lad's work I found on here. I'll post it tonight along a credit to him. A PCB will be available (at cost) in a couple of weeks if anyone is interested. Addendum The author of the encoder.h is called Thomas Henry --- 6/7/2014 of whom I offer my grateful thanks for an excellent piece of work. His post is called : 'Incremental Rotary Encoder Include File' and the .h file is attached below.