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Electric Fence Energiser

Jolt capacity for 50 days

Electric Fence Energiser
Are you bothered by stray cats and dogs prowling and digging in your garden? Or does your own pet require strong persuasion to stay within a restricted area? This electric fence generator may well be the answer to your problems. A simple generator built around a 555 timer and an old ignition coil are sufficient to build a suitable circuit at a small outlay.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

R1 = 15k
R2,R3 = 6k8
R4 = 1M
R5 = 390k
R6 = 470
R7 = 560
C1,C2 = 100µF 63V radial
C3 = 10nF
C4 = 1µF5 MKT, lead pitch 5mm or 7.5mm
C5 = 220nF 630V MKT, lead pitch 22.5 or 27.5mm, size 11x30 mm
C6,C8 = 100nF
C7 = 47µF 25V radial
D1 = zener diode 10V 0.5W
D2,D3 = 1N4148
D4 = 1N4007
D5 = LED, low-current
D6 = 1N4002
T1 = IRFP460PBF (500 V/20 A, TO247AC), e.g., Digi-Key IRFP460PBF-ND
IC1 = TLC555CP (do not use NE555!)
K1-K4 = Fast-on (spade) connector, vertical, 2-way PCB mount
S1 = slide switch, PCB mount, 3 x changeover (2 poles, 3 positons), e.g., Conrad Electronics 708097-62
In-line fuse 4A T (slow) with holder
12-V ignition coil (w. length of spark plug cable)
1 wire link (next to D2)
PCB, ref. 050248-1 from The PCBShop
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