Recent content by Martyn Arthur

Ah got the wiring messed up, ok now; apologies for having wasted your time; thanks for your patience! Martyn

i don't know of anything untoward. Originally just the screen functioned with no characters then it just gave up. Am I correct in believing that the wiring previously described is such that the screen should illuminate? Thanks Martyn

Hellol I have pins for this; apologies for subseqquent bold; bold option is not responsive. Compatible with HD44780 1602 16x2 Serial LCD White Character Blue Backlight Display Board 3.3V 5V , Using Arduino Uno. 15 and 16 connected; 16 to gnd via a 220ohm resistor and 16 to 5v. Mtest meter...

thanks, it is viewing the CH340; I've pretty much tried everything; giving up now; have acquired original - v - clone Thanks Martyn

hi; i purchased 3 of these, AZDelivery 3 x AZ-MEGA2560-Board Bundle with Prototype Shield and each is reporting the error message below. I have triple checked every aspect of the set up and all seems in order, cable devices port, board reburn bootloader et al . I have substituted an arduino...

Great thanks; I ave worked out the workbook installation; and I guess when I an up and running writing the code will be a process to learn. I am stuck wit the 'simple' basics of understanding the system; textbooks seem lean on this; any suggestions please? Thanks Martyn

TL;DR Summary: Asking are you able to assist with problems relating to SQL coding and preparation Hi; I am looking to move into the fireld of Pyton and SQL working towards maybe employmnet in those fields (do people age 75n get jobs :-)) Anyway it looks daunting with ancillairy references to...

I understand now; thanks for your time and help Martyn

Thanks for the responses, points noted, missing bracket follows at the end af the statement. I am working on the basis of the procedure I have been given attached.

Hi I am not looking for the calculation to be done; thats my job. I can't figure out the format of the multiplication. Is it ((sinpsii)(xzi)+(cospsij))(xzi)+((sinpsii)yj+(cospsij))yj +((sinpsii)(x+y)k+(cospsij))(x+y)k then requiring simplification? Thanks Martyn

This is all really helpful; thanks Martyn

Thanks;; its an astrophysics course; we aren't expected to learn Python or being taught it. We are just given the Python notebooks to use to plot the data from, on this occasion star clusters which is what has happened, its worked and we have the plot. Below is a plot of the same cluster Its x...

TL;DR Summary: How to understand the code determining the plot Hi; this is the code I have been given for a H-R diagram of M35; I understand the inversion concept.. The plot is below. I am trying to understand the code that creates its position and size and how to alter it to a more...

Thank you; I need to go away and think about it. Martyn

So naming the 2 solutions x we have +x and -x?