|
|
| Circuits Designed by Dave Johnson, P.E. : |
|
Snow Depth Alarm - The design of this system alerts a snowplow driver when the snow depth has exceeded four inches. A visible red LED packaged in a 10mm package is pulsed at a rate of about 50Hz with 10uS pulses. Twenty four inches away a phototransistor detects the light from the LED. The LED and the phototransistor are housed in a section of ½ inch PVC pipe, forming a waterproof seal. . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2006 |
|
|
|
|
|
Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:
|
|
|
|
Got Designs?
Please eMail if you want me to link to and/or post your original design. Thanks. |
|
|
|
|
|
|
Snow Level Monitor Circuits |
|
|
