Hi there,
I aquired this electric fence unit as it was no longer sufficient to supply the farm in which it came from.
It is a moblie unit which operates from a 9v 90Ah battery.
The unit itself sells under the name of ELEPHANT MOBILE and is built by Ing.Fa GRAND A/S. Made in Denmark.
I wanted to learn more about the operation of these circuits, so I decided to follow the circuit out.
The IC in the photos is an NE555 set in astable mode and gives pulse every 1.5 seconds.
There are two, physically large 4.7μf capacitors on the board.
I am having trouble determining what the grey component on the board beside one of the capacitors is? On the underside of the board it has six terminals. There are no markings or codes on this component.There is a potentiomter in series with positive and one of the terminals from this component (3rd Photo)
In the first photo (top left corner, on/off switch), the negative from the battery is used to switch this unit on and off unlike normal postive switching, what is the reason for this?
Any help on explaining the operation of this type of circuit would be greatly appreciated as I have had trouble locating information specifically for this.
Thanks
NM
I aquired this electric fence unit as it was no longer sufficient to supply the farm in which it came from.
It is a moblie unit which operates from a 9v 90Ah battery.
The unit itself sells under the name of ELEPHANT MOBILE and is built by Ing.Fa GRAND A/S. Made in Denmark.
I wanted to learn more about the operation of these circuits, so I decided to follow the circuit out.
The IC in the photos is an NE555 set in astable mode and gives pulse every 1.5 seconds.
There are two, physically large 4.7μf capacitors on the board.
I am having trouble determining what the grey component on the board beside one of the capacitors is? On the underside of the board it has six terminals. There are no markings or codes on this component.There is a potentiomter in series with positive and one of the terminals from this component (3rd Photo)
In the first photo (top left corner, on/off switch), the negative from the battery is used to switch this unit on and off unlike normal postive switching, what is the reason for this?
Any help on explaining the operation of this type of circuit would be greatly appreciated as I have had trouble locating information specifically for this.
Thanks
NM
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