Recent content by mark.duyvesteyn

I want to add a small RFID module to a picaxe circuit. It is not security critical - just want it to run on a pump when it is in presents of a RFID card - any card/tag will do, so dont need to read and decode numbers or anything. Would it be possible to interface with the below reader with a...

I've got a solar powered weather station consisting of a old Nokia phone, a 40X2, a wind vane/anemometer and a whole lot of Optoisolators which "press" the buttons on the phone, which composes a txt message which gets sent via a gateway as a tweet. It's is a very round about way of doing it...

My 2 year old cat keeps wandering off to a neighbours house about 500m away. Have done every thing to try prevent him doing this so it's time to get a bit techo... One of the only ways to get to the neighbours is over a small foot bridge, I want to set up a water sprinkler so that when he...

Hi everyone, I've got a spa pool hooked up to a 30 tube vacuum solar panel. I have a one wire sensor in the panel, and another in the pool for controlling the small 12v circulation pump. the basis of the code is pretty simple; If temperature in the pool is less than 37 degrees, and the solar...

I have made a small wind meter that tweets out the wind speed and direction, using an old cell phone and a X2. It has been going great.... until today. It has started tweeting higher than expected wind speeds and gusts which are lower than the average - which should be impossible according to...

"stack error - more nested gosubs than the stack allows" I have googled this error and the common cause seems to be when you have a gosub but no return. Is there any other reasons? My code seems to work fine for hours and hours on the chip, but in simulation is errors out after a couple of...

Hi all, I'm making a tweeting mobile weather station, so far i have it tweeting wind speed, wind gusts and wind direction and i would also like to tweet the tides. The weather meter is being used for kitesurfing - where we go in Raglan NZ it is quite dependent on the tide and i want to have...

Hi Everyone, I'm wanting to build a simple a device to measure the head space left over in a bag of powdered product. A small vacuum pump will remove the excess air from a bag and when a certain vacuum pressure is reached (all air removed, plastic bag against product) the motor will stop and...

Hi everyone, Im looking at making a remote weather station, that will text me the wind conditions for kitesurfing at the beach, have found a weather station that will do the trick, but need to interface it with a cell phone or a GSM module to send the sms. The weather station I plan on using...

Me and a friend have just got into kitesurfing and we want to make a camera tracking system to film us doing jumps and stuff. The idea is to have a gps and an xbee on one of us out on the water. The xbee would send the GPS data back to a picaxe on the shore which would drive a servo to pan the...

Im wanting to interface with a set of bathroom scales with a picaxe, so that i can log the weights and upload the data to a google spreadsheet. I have a set of scales, that has four load cells, so reading the different strain gauges would be a bit tricky i think. Is it possible to get the...

Ive just hooked my power meter up to a picaxe and have been uploading the data to a google spreadsheet. Today i interfaced the gas meter, using a reed switch (the fastest moving barrel has a small magnet in it :) The problem is that it spins slowly, about 1 rev/ 45 seconds which will give me...

using an 08m, some python script and an LDR i am measuring the flash from the led on my electricity meter, converting it to cent and posting the result to twitter. From twitter u can graph the usage and keep a track of things. Have a look the twitter page, www.twitter.com/AtOurHouse just...

how could i get a picaxe to sense the wether or not current is flowing along a 240 volt extension cord or similar without using the actual live wires? Im not concerned about the value, just a simple on or off. Would using a small coil or wire in close proximity induce a voltage? Thanks for...

i want to have a play round with hacking my rinnai continuous hot water system. My flatmates like to have long long showers, and the power bill is suffering as a result. My idea is that after the hot water has been running for 10 minutes to decrease the temperature to as low as it will go -...