I believe I have the rights parts for the circuit but just can't get my head around the wiring it up correctly thing. The more I look at it..... the more I'm confused, as well as being a novice.
What I am trying to achieve is a circuit that activates a piezzo buzzer when a circuit is made live and when closed for my Triumph motorbike . I have a
1)1000uf capacitor to hold a small charge to power the buzzer,
2) DPDT PCB relay,
3) IN4004 400v 1amp diode
4) Zenner diode 12v to clean up the capacitor voltage drop to have the piezzo chirp rather than fade out
5) piezzo buzzer

The guys at Altronics did a mock up to test in principle for me however the photos I took are useless.

Any help with a schematic would be appreciated....

Thanks
Paul

Any help

 

This is what I have so far...

 

Hi ! -- Perhaps i think too much but i find there are some "conflicting" data

1. 1000uf capacitor to hold a small charge to power the buzzer (low power -- stores little energy)
   1. DPDT PCB relay, (high power -- can not be run from 1mF(=1000µF) capacitor for long time)
      
   2. IN4004 400v 1amp diode (depends)
      
   3. Zenner diode 12v to clean up the capacitor voltage drop
      to have the piezzo chirp rather than fade out (high(wasted) power -- as what can be assumed how it's used in circuit)
2. piezzo buzzer (low power -- uses little energy -- only when implemented correctly to achieve such)

if you want an autonomous alarm use alkaline(that is not rechargable) or https://www.planetanalog.com/how-to-charge-lithium-iron-phosphate-rechargeable-batteries/

 

Each of the components on the drawing have only one pin, but the parts must have at least two pins each. Can you do a hand sketch of what it is you want to achieve? Maybe a logic table showing the output conditions for each combination of input conditions?

ak

 

? like that

src. :: https://electronics.stackexchange.com/questions/218806/12-15v-short-beep-sound-simple-circuit

 

What I am trying to achieve is a circuit that activates a piezzo buzzer when a circuit is made live and when closed for my Triumph motorbike .

What does this mean? Do you mean activate the buzzer when a switch is closed?

 

"made live" --> power is applied to the circuit by the ignition switch ? (yes / no)

"circuit ... is closed" --> once powered up, the circuit activates when a switch is closed (pushed, turned, whatever) ? (yes / no)

ak

 

Thanks ci139, this looks like what I'm trying to achieve, just want to add the Zenner pre buzzer to cancel the fade out as the capacitor discharges.

? like that

src. :: https://electronics.stackexchange.com/questions/218806/12-15v-short-beep-sound-simple-circuit

 

What does this mean? Do you mean activate the buzzer when a switch is closed?

Yep, both ways. I have no way of knowing if the parker lights on the bike are on or off (without physically looking at the front) especially when turning off the ignition. A "chirp" will let me know that the key position is parkers off.

Nothing worse than getting a flat battery....

 

"made live" --> power is applied to the circuit by the ignition switch ? (yes / no)

"circuit ... is closed" --> once powered up, the circuit activates when a switch is closed (pushed, turned, whatever) ? (yes / no)

ak

Yes on both accounts ak..

 

What does this mean? Do you mean activate the buzzer when a switch is closed?

It's to be used as an audible cue Dennis that the parkers are on and off.

Had looked at a simple led wired into the parkers mounted on the instrument panel but no where to mount it aesthetically pleasing.

 

the previously posted circuit likely has a wiring BuG !!! . . .

it can be made adjustable -- simulation -- but then depends on battery terminal voltage !
-- the bad point with such , is that , the relay is not intended for continuous switching & wears off !!
...
_
made some TEST-s ---- the Falstad simulates wrong the Relay switching
___ ↓↓↓↓ LT-Spice ( !!! not exactly correct - but a lot better than Falstad !!! ) ↓↓↓↓

___ alternate (Less Voltage dependent compile . . .)

 

To clarify -

Is the beeper supposed to beep *both* when the circuit is first powered up AND when it is powered off?

Is there a switch in the circuit (as mentioned in post #1), OR is the coming and going of power the only control?

Depending on the answers, the circuit in post #5 could get a bit more simple.

ak

 

Hi guys,
Really appreciate the time you are putting into this..... Just to recap that it's going to be wired into the parker lights circuit under the pillion seat and generates a chirp when then parkers are first turned on and then again when off. It's basically a mechanism to let me know the parkers are off so I don't get a flat battery. #5 looks the go so have started wiring it up.

Thanks again.

 

? like that

src. :: https://electronics.stackexchange.com/questions/218806/12-15v-short-beep-sound-simple-circuit

I was searching for such a circuit. It is needed because we have an uninterrupted power supply (inverter - Exide India) and whenever the power supply goes off there is no hint for me since the power continued to be on from inverter and again when mains power resumes also there is no hint. For this purpose I wanted it. And thanks for the circuit diagram , I assembled it and it is working perfect. I convey my regards to the author. I am a retired person from the field of finance, but interested in hobby electronics. Thanking you. VG KRISHNA, INDIA, HYDERABAD.

 

Thanks to your message that the thread was more than a year old. Now, from me, It is only a thanks giving message to the author for the simple beautiful circuit! I assembled it and it is working perfect.