Recent content by Jeroen

Hi all, For some reason I am facing troubles connecting the TSOP 1838 which is sold as LED020. The idea is to program the 18X using the CHI030 project board, so the chip can be plugged into the project later. I built a little circuit for the TSOP as stated on page 78 of the basic commands...

Hi, When designing a new solution I've ran into the following challenge: for a given application I need to find values in a storage table based on date and time. Including the key(date, time)it adds up to 615kB total of data storage that contain values I might need. I could leave out the key...

chi035 and unipolar stepper wiring weirdness - not coding Hi, I hooked a 5-wire unipolar stepper motor up to the chi035 board for prototyping. It is exactly as the manual (interfacing circuits) describes. When all seemed to work fine I started measuring voltages and currents in order to build...

Hi, I've built a circuit for using a picaxe 18x for i2c communications with a pcf8570 (ram) and a pcf8573 (calender/clock). Any read attempt to either device results in the value 255 ($FF). I've checked reading an erronous address, this gives the same result. So somehow the ic's are not...

Hi, I am looking for ideas to create a homing beacon for my bot. The problem here is that I have a few requirements that make the commonly used beacons like IR, unusable (I think): - the terrain is not a flat surface, the difference in height can be 3 foot; - the beacon does not reside on a...

Hi, I am considering a project to control a brushless dc motor as found in cd drives using a picaxe 18a. These motors come with the necessesary position sensors as hall effect sensors. Unfortunately I have no experience with these things. Can I just hook them up like i.e. thermistors or ldr's?

For a hexwalker project I have a need to control at least 4 and in a later stage 6 servo's. On the input side, there are 4 inputs foreseen yet plus the ultrasonic range detector. I understood from the documentation that the SD21 servo controller is ideal since it maintains the 20 ms refresh...