Model Railway Detecting Diesel Horn Generator - Code: RK-DDHGP

This unit detects the passing of a train, and uses a PIC microcontroller to generate a diesel horn sound for model railways.

Detection is by a light dependent resistor (LDR) The photo at lower left shows an LDR set in the track. An optional second detector allows for activation from 2 points for example, both sides of a crossing.

Jumpers on the Printed Circuit Board (PCB) can be used to determine whether the sound is a single blast, or a long/short/long pattern of sound. The unit may also be manually triggered, via a push button. (The green wires in the photo at left.) It has its own speaker.

It operates from 12 volts DC, and requires approximately 10 mA standby current, rising to approximately 125mA when the horn is sounding.

Click on the photo to hear the sound generated.

Kit price for           RK-DDHGP: $33-00

Click here to go to Aztronics web site

All kits available from :
Aztronics Pty Ltd       Phone 8212 6212
170 Sturt St,                     Fax 8212 4212
Adelaide, SA, 5000.                                

Information:         David Crosby

Click Aztronics logo to go to Aztronics Web site, or Click to email     Aztronics     or     Kit designer

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Last updated 3rd February, 2017.
(C) D. Crosby, December, 2011.