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    Sensiron SHT31 on PICAXE

    Hi all, I was just wondering if anyone had managed to get a PICAXE I2C working with this part, since there is no point in re-inventing the wheel so to speak? Currently here: symbol addr = $44 symbol readcmdMSB = $2C symbol readcmdLSB = $00 hi2csetup i2cmaster, addr, i2cslow, i2cbyte hi2cout...
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    DS18B20 CRC checking?

    Hi all, It is great to be able to just use the readtemp12 routine to read the 12 bit temperature from a DS18B20. ;) Now, when I've pushed the cable length beyond the 10M mark and it is an electrically noisy environments, sometimes the results which come back are clearly wrong, but...
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    Remote TOUCH16 sensor, mitigating lead length issues

    Hi there, I am setting up a remote TOUCH16 based sensor which houses a PICAXE-08M2 which transmits 4800bps readings when polled by a 28X2 base unit via a 'request data' signal line. I have read that the TOUCH16 command is affected by long leads on input pins and the presence of the serial...
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    Simple question about frequently issuing adcconfig commands

    Hi all, I am building a dual thermometer circuit using precision NTC thermistors with parallel and series resistors (thus creating in effect a potential divider with low power dissipation through the NTC). Clearly using adcconfig to set Vref-, Vref+ to external pins with preset voltages will...
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    Input impedance of ADC10s, or something else (like ADCsetup) on a 40X2

    Hi, It may be that I'm worrying about nothing here, but just in case :p. I have a load of NTC like this https://www.circuitlab.com/circuit/btt9cg/100k-ntc-circuit/ connected to ADC channels 19-27. There are a load of digital inputs and outputs on the other pins. Thinking I have set up the...
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    Searching for PICaxe SDI-12 implementation

    Hi, I remember back into the distant past (wow that's over 3 decades!:rolleyes:) that my one of software lecturers at Brighton said "don't re-invent the wheel"! So, I was just wondering if anyone has come across a SDI-12 PICaxe implementation? http://www.sdi-12.org/ (Would have to be for 28 or...
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    24v->5v PICAXE power conditioner - thoughts?

    Hi, I have drawn out a circuit diagram to take a standard isolated 24Vdc control panel power supply input and enable it to be used in a DIN rail box mounted PICAXE circuit to control temperature of a heated bed for horticultural seed germination (and probably other things later on). The main...
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    20m cable run switch input to 08M

    Hi, I need to monitor the spare contact on a Finder DP relay but the other contact is switching a 240V contactor coil. I will use 20M of 4C screened cable with the screen connected to mains protective earth. The relay coil is switched by 24Vac. Prospective circuit diagram based around...
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    4 or 8MHz resonator doesn't appear to make any difference - huh?

    Hi, Firstly thanks for reading this. I have the AXE022 proto board running fine. Also I have just made a 28X1 board which is also working fine. Both have 4MHz resonators as default. When I change the resonator on either board from 4MHz to 8MHz nothing seems to change! i.e. LED flash rate...
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    Must be something simple; no download on 28X/40X proto-board

    Hi, If you're reading this - thank you! :) I'm having problems getting any communication between PC and 28X/40X protoboard AXE022P (which I bought from techsupplies pre-assembled). I'm using a new 40X1 part inserted the right way round. The only thing added to the protoboard are a few turned...
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