Recent content by matherp

This is a paraphrasing of what was originally posted - hippy Well not completely. I will still use the 08M2 and possibly the 14M2 but I am finding the bigger chips no longer have the capabilities which I need for my projects so I am having to choose alternatives. Those products provide support...

One of the things which helps software development productivity is having a flexible and easy to configure hardware platform. In this case my board is also designed to be a complete solution for individual finished projects by part populating the components as required. There are three areas...

Very simple project that I did yesterday saving £80 on a commercial solution. May be of use to someone http://tailwindbuild.blogspot.co.uk/2014/10/18th-october-2014-magneto-woes-and.html

Apologies if this has been covered but the search returns so many threads on radio I didn't quickly find anything suitable. I want a central picaxe system (this will be GSM enabled) to two-way communicate with 4 (initially but may grow to 8) picaxe outstations - range less than 30m. All...

One for the analogue experts: I want to produce a voltage between 2.2 and 3.5 volts with around 5ma drive capability from the DAC on a 08M2. I'm using the internal voltage reference FVR4096 as the +ve input to the DAC If I just put the DAC output into a rail-to-rail opamp (MCP612). Then I can...

Hi I want to be able to send a text if the mains power trips in a holiday home - this seems to happen regularly if there are thunderstorms nearby. Getting a battery backed picaxe to monitor the power is easy - the bit I need help with is sending the text. There are many GSM devices out there...

I needed a 10uF ceramic capacitor for a circuit I was breadboarding. These don't exist in a leaded package but I had some 1206 and 1210 SMD versions. I realised that the pitch on these is a perfect match for a standard 0.1" 2 pin header. I used a small crocodile clip to hold the capacitor to...

This is another program using the tlg13ua06 (tln13ua06) wifi-uart. I have to confess I'm pretty pleased with this one :-) This is a 7-day digital timeswitch which uses one of the very accurate DS3231 battery backed clock modules. The only local control is an override switch which when the unit...

Based on the signed multiprecision routines I've posted in snippets, this code is for a high accuracy barometer with full temperature and altitude correction based on the bmp180. The code does all the arithmetic in 40-bit mode which results in no loss of accuracy. The code includes commented...

I've been playing with the Nokia 5110 display. These are now available very cheap and work well with any picaxe with HW SPI. I found code from hippy and srnet http://www.picaxeforum.co.uk/showthread.php?21676-Mini-Morse-decoder-using-Nokia-5110-graphics-LCD&highlight=5110...

If you have used LCDs, whether serial or parallel, then you will be used to the issue of getting numbers correctly formatted. You use bintoascii and then you have to strip of the leading zeroes before output. This all looks OK and then you get a number a decade smaller and the display leaves the...

Based on the work of Ibenson with the TLG10UA03, I've developed a generic PCB to allow building fully engineered web accessible monitoring and controlling applications. The sample code provided in the next post is designed to work on an AXE401 for development rather than the version for the PCB...

Hi All Not based on picaxe unfortunately but there is a course on embedded systems starting with the edX group of universities (MIT, Harvard, Caltech, etc.). Looks like it starts from the basic LED flashing and progresses to writing a space invader program to run on a Nokia 5110 LCD. You can...

I'm starting to get to grips with PE6 and key nice new features are the push and pushram, pop and popram commands. However, from the online help it is unclear to me where the data goes and if it has any effect on any other user accessible memory (peek, poke etc.). Please could this be...

Hi I want to control some electric heaters (up to 3KW, 240VAC) so I'm looking for a properly engineered commercial mains switch, meeting all relevant standards, that accepts an opto-coupled logic level input. I know I can hack a remote mains switch controller. For my own use I've also employed...