Typical automotive horn draws 5 to 8 Amps @ 12 VDC. Typically driven by a horn relay. That should produce a 95 to 105 db sound level. Good luck. This won't work well but you will eventually figure that out.

Ron

 

shal i buy big battery can u rec me 1

 

The last time I played with a common buzzer type car horn it took on the order of ~ 15 amps.

I seriously doubt the battery powering the drone has that degree of reserve capacity to hold that load up plus stay flying nor do the electronics have the capability to deal with the amount of inductive electrical noise the horn buzzer coil and contact system makes either.

 

shal i buy big battery can u rec me 1

I don't do text speak. You see the current draw so figure it out. This has all been covered before in your questions. You can choose to learn or not learn. Figure when on between 8 and 15 amps so work it from there.

Ron

 

Still too much for that tiny battery.

The battery he linked is 500mah, rated at 30c for 10sec. So should be able to put out 15a in small bursts.

 

The battery he linked is 500mah, rated at 30c for 10sec. So should be able to put out 15a in small bursts.

As an example - my e-cigarette draws somewhere between 3 - 4A. The MK1 used a single 2200mAh 18650 cell, these were scrap in less than 1/2 a year. The MK2 has a parallel pair of 18650 cells, the last set of battery packs got retired after 3 years, and I later found out the batteries had got the blame for a fault elsewhere.

High current draw gives the battery a hammering - even if within published spec.

 

As an example - my e-cigarette draws somewhere between 3 - 4A. The MK1 used a single 2200mAh 18650 cell, these were scrap in less than 1/2 a year. The MK2 has a parallel pair of 18650 cells, the last set of battery packs got retired after 3 years, and I later found out the batteries had got the blame for a fault elsewhere.

High current draw gives the battery a hammering - even if within published spec.

I imagine the battery will outlast OPs drone, or at least outlast his interest in using drones to herd cattle/shock insects.

 

I imagine the battery will outlast OPs drone, or at least outlast his interest in using drones to herd cattle/shock insects.

When I stripped the Decca Deram tube stereo - I got a pair of mains transformers with CT HT secondaries - in series; they lit up an earwig very nicely.

 

I would go with a piezo actuator. Like in a smoke detector......but I would lower the tone for animals.

And you might consider a can of air, horn. (boating) They are small, light weight and loud. You would need to design an actuator for it......like a solenoid, etc.