Production of electronic fishing machine

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Production of electronic fishing machine

The electronic fishing device is an appliance that quickly discharges DC high-voltage electric energy into the water and stuns the fish. The fisher circuit is shown below. When the switch SB is pressed, the self-oscillation circuit composed of VT1, VT2, R1, L1, L2 starts to generate a square wave with a frequency of about 2 kHz. The transformer is boosted, so that L3 outputs an AC voltage of about 300V, and then voltage doubler rectification is performed through VD1, VD2, VD3, and VD4, and DC high voltage of nearly kV can be obtained on C1 and C2, and the high voltage is R2, RP, R3. The voltage dividing circuit composed of R4 can make VT3 and VT4 saturate and conduct, and the relay K energizes and pulls, and its normally open contact is closed, so that the electric energy on the capacitor is quickly released into the water, and the fish is stunned. After the capacitor is discharged, the voltages at points A and B drop sharply, so that VT3 and VT4 are quickly cut off, the relay K is de-energized, the contacts are disconnected, and the voltage between the two points A and B is immediately charged to the peak, VT3, VT4 again. The saturation is turned on, and the process is repeated, and the electric energy on the capacitors C1 and C2 is intermittently released into the water by the relay. RP can adjust the saturation depth of VT3 and VT4, thus controlling the absorption and discharge frequency of the relay. R1 can limit the working current and output power. Generally, the silicon tube can be used for 47 ohms, and the stern tube can be used for 100 ohms. The transformer uses an E17, E20 ferrite core that produces a power output of 100-200W. The fishing range can reach more than 1 meter.

VT1 and VT2 are used in parallel with three 3DD15 series respectively. The magnification is slightly larger, and other NPN tubes can be used instead. The transformer is calculated by 2匝 per volt, L1 is wound with a diameter of 1.5mm and the strength is wrapped around 24匝*2, L2 is wound with a diameter of 1mm and 10匝*2, and L3 is wound with a diameter of 0.35mm. VT3, VT4 can be used with general low-power triode, K with 9V relay, contact current should be greater than 10A. The battery can be used with 12-14V, 10-30AH, or two 6V motorcycle small batteries can be connected in series.

The high-power tube should have a large enough heat sink, and the current of the whole machine is about 8A. After the machine is installed, a 60W-100W bulb can be connected to the high-voltage output test machine. Pressing the switch SB, you can hear the “beep” sound from the transformer, indicating that the machine has started to vibrate. If it is not vibrating, you can adjust the two heads on the L2. Then adjust the RP to see the bulb flashing and the bulb can emit a brighter flash. Ready to use. The frequency of use in summer should be higher and the winter should be lower.

If there is already an inverter power supply, you can assemble a fishing booster head according to Figure 2. The effect is also good. When using, insert the machine head directly into the 220V output hole of the inverter and connect the electrode to the high-voltage terminal of the machine head. Just go up. The component parameters are selected as shown in the figure.

Editor's Note: 1. Please make sure to pay attention to the safety of the electronic fishing machine. 2. This site is published for the enthusiasts to learn the circuit. This site advocates the protection of wild resources. If you want to use it, please contact the fishery first. 3. This site is not responsible for all responsibility for the production and use of fishing machines.