Auto Intermittent Deer Horn - How to?

[TestDrive]

• I drive 150 miles each night (1:00 AM to 6:00 AM) in the boonies of North Central South Dakota.
• Most all of this is narrow two lane roads with lots of deer, raccoons, jack-rabbits and the rare, escaped, all-black/stealth cow.
• Farm yards located with in 1/4 of the road are about 5 miles apart.

I would like to out fit my car with an intermittently beeping horn that can be operated via a toggle switch. Ideally the horn should emit short (1/8-1/4 sec.??) beeps about once each second.

I need an electric horn, a (HD) horn relay, wire, fuse & fuse holder toggle switch and ...

An suggestions for a cheap, ready made actuator circuit? Intermittent wiper are too slow. Emergency flashers are 50% on 50% off and speed is dependent on load.

[Johnny Mullet]

Cherry Bomb. Loud pipes save lives

[TestDrive]

Originally Posted by Johnny Mullet

Cherry Bomb. Loud pipes save lives

Thanks for the thought, but loud pipes also wake up people in houses trying to sleep. There are five little, quiet towns where I deliver newspaper bundles. I only want to be noisy for 80-85% of the route. I could get one of those european style, alternating high note - low note sirens - but that would be overkill. (Not sure it would be legal either.)

[trebuchet03]

You need a timer.... Like the one I used for turning a cheap digital camera into a time lapse camera

Quick and Easy Electronic Time Lapse



If you can solder, the kit goes together in a few minutes (at least for me) - aquick google search, and I found a place selling the same timer I used
Adjustable Interval Timer MK111 - VETCO.NET


That's how I'd do it cheaply...

[Duffman]

If you understand all this than it will be simple to build and you wont find a cheaper way I dont think. You will need a transistor on your output to power your relay.

[bikin' Ed]

Originally Posted by trebuchet03

You need a timer.... Like the one I used for turning a cheap digital camera into a time lapse camera

Quick and Easy Electronic Time Lapse



If you can solder, the kit goes together in a few minutes (at least for me) - aquick google search, and I found a place selling the same timer I used
Adjustable Interval Timer MK111 - VETCO.NET


That's how I'd do it cheaply...

This kit is great! I used it to control the A/C compressor on my old car after the $1500 computer quit doing it.

[TestDrive]

Originally Posted by Duffman

If you understand all this than it will be simple to build and you wont find a cheaper way I dont think. You will need a transistor on your output to power your relay.

Thanks for the thought, but it's all greek to me.

Originally Posted by trebuchet03

If you can solder, the kit goes together in a few minutes (at least for me) - aquick google search, and I found a place selling the same timer I used Adjustable Interval Timer MK111 - VETCO.NET

That's how I'd do it cheaply...

Thanks. Not exactly what I want, but close enough - I'll probably order the kit.
Spec. for the kit is

• output relay with dry switch-over contact: 3A/24V
• pulse time adjustable: between 0.5 and 5 sec. (0.2 sec - 2 would be better.)
• pause time adjustable: between 2.5 and 60 sec. (1.0 - 6 sec or more would be better)
• power supply: 12V DC / 100mA
• dimensions: 1.6" x 3.4"