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I was searching for tools to help me find and measure small quantities of iron in otherwise non magnetic samples. I found a piece of laboratory equipment that would do this. The principle is that the sample is inserted into a coil, and the amount of iron varies the inductance of the coil, and...

I've searched the forum on this, plus the net, and not quite finding the answer i want. A company i deal with is investing in a data acquisition system that requires data to be sent with a calculated checksum, or the data is ignored. Sounds like a pretty smart way to maintain data integrity...

I have set up a Picaxe 28xi to measure differential pressure, read from 2 x 0-5V output pressure transducers. I'm reading at around 10% of the range of the transducers (bought cheap), so keen to use ReadADC10 rather than muck around with op amps, the final result will be accurate enough for my...

The answer must be in the forum somewhere, but it seems i can't do a search on "Hot", not enough letters, and i don't know a longer word for hot. I have made up a new circuit for a Picaxe 28X1. I can't download a program into it, and i know that from other projects i have that connected the...

Hi Forum, I'm still developing my event data logger which you have given me heaps of help with http://www.picaxeforum.co.uk/showthread.php?t=7745. This unit (now with 100nf capacitors) is going on a large mining excavator (600 tonne) The idea is is to measure the pressure differential on the...

Hi All, I am attempting to build a device that, based upon data from a pressure transducer, will record the time certain events took place. These are pressure spikes to be recorded in an eprom chip, and displayed on a Serial LCD, and output in serial to an attached computer using the sertxd...

I have set up a circuit with a Picaxe 18X, and a clock on the i2c bus. It seems to have loaded the time OK, because the numbers i see when using debug look right, and the clock light flashes. I've spent all day trying to use SERTXD to display the time from the clock chip. Then I discovered...