I’ve been quite busy the last few days with various performance testing. A friend of mine is keen to develop a robo-football platform. Due to the nature of the game, very fast sensor updates and processing is required to track the ball and the opponents. I’ve offered to work on [...]
Here’s the first release of the HiTechnic Prototype Board driver for RobotC. It has all the basic functionality you’ll need to use it. byte HTPBReadIO(tSensors _link, byte _mask) Returns values of inputs specified by mask void HTPBWriteIO(tSensors _link, byte _mask) Writes values to outputs specified by mask void HTPBSetupIO(tSensors _link, [...]
This morning the postman delivered a small package from HiTechnic, the Lego NXT Sensor folks. Steve, one of the engineers, asked me if I would be interested in writing a RobotC driver for their Prototype Board. I said I was, so he told me he’d send one and here it [...]
The HiTechnic IR Link Sensor allows you to use IR signals to communicate with the Power Functions IR receivers, the remote controllable Lego trains and the venerable RCX. I bought myself one a few weeks ago and have been busy tinkering with it ever since. I contacted the HiTechnic company [...]
Using a pot meter to test the MAX127 is not a hugely useful way to exploit the power of this ADC. Instead, this time I have replaced the pot meter with an IR receiver. The main part of this circuit is still exactly the same as in the previous MAX127 [...]
It’s been a little while since my last article about adding peripherals to the NXT, but not due to the lack of experimenting and programming, let me tell you. In my quest to tame the Maxim MAX127, I ran into a few annoying bugs in RobotC. The first one involved [...]
If you’ve been reading my articles (1, 2) on the Mindsensors PCF8574A board but are unable to purchase one for any number of reasons, here’s a blatant clone made on a breadboard. It will function pretty much the same way as the Real Thing but doesn’t look nearly as nice. [...]
To the left are the fruits of about an hour’s worth of hack-sawing, soldering and hot gluing. If you can’t see from the pictures what it is, let me explain. It’s one of the Mindsensors NXT connectors attached to a cut-to-size prototype copper strip board. It’s not the prettiest thing [...]
The Mindsensors PCF8574A board is not just suitable for making das Blinkenlights but also for controlling other ICs. I recently thought of how I could use my old 9V motors with my NXT using a dual H-Bridge IC such as the SN754410. This IC is pin compatible with the very [...]
About a week ago I ordered some product samples from Maxim. I am not talking about the men’s magazine but the IC manufacturer. Well, they got here yesterday so that’s pretty damned quick if you ask me. I was keen to get some hard to obtain ICs for my robot [...]
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