07 Jan 2007
The Philips I²C bus was designed for easy interfacing. The clock on Minerva MKII uses an I²C chip.
NEW PRODUCTS
Power Driver
This provides 16 TTL input/output lines (as parallel interface). In addition, using some of the TTL I/O lines, it can provide eight power outputs (up to total of 4 amps) for switching or relays, motors etc. For instance 8 motors can be driven in one direction, or 4 motors powered with reversing capability. Each power output can source or sink current.
Relays
A box with eight mains rated relays capable of 3 amps each. Plugs direct into the power driver.
Temperature sensors
These plug into the Minerva I²C bus or any other I²C bus. This uses the LM50 sensor giving a range of -40°C to +125°C, accurate to +-1°C after calibration. Up to 4 sensors can be connected to each of the two ports on the analogue interface.
LEGO Ben was 7 year old when he discovered Lego Dacta at Legoland Windsor. These are Lego sets controlled by Apple Mac systems. The Lego costs around £50 but the control interface and software is £280! These control motors and receive digital and analogue input. You can imagine the way my thoughts are going can't you! Well soon I will buy the Lego side of Dacta (for the BUSINESS of course). I have produced a box with Lego connectors on to plug into the analogue and power driver interfaces. Ben has demonstrated his LEGO Technik models at many QL meetings.
We produce two other circuits using the I²C interface:
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------------------------------------------------ QBBS (QL fido BBS 2:257/67) (+44)1442-828255 email Tony Firshman (edit in name) TF Services Voice: (+44)1442 828254 Fax: (+44)1442 828255 29 Longfield Road, TRING, Herts, HP23 4DG ------------------------------------------------