The perch and other fish readily takes the bait, when fishing line with a hook often twitch. But hand to pull the fishing line with a frequency of 200 to 300 oscillations per minute impossible, and slowly tiring - tired arm.
Shown here e-rod twitches itself. At the heart of its devices asymmetrical multivibrator, the pulse repetition rate which is regulated by a variable resistor R1, and the pulse duration - value capacitance C1.
Food - 1-1,5 V. as an actuator used in the relay Tina RCM with the winding resistance of 2.4 ohms. In the absence of the low-resistance winding of relay any relay rewinding wire sew-1 0,41-0,44 to fill the frame. With relay removed all contacts, only used electromagnetic system. The spring biasing the anchor, you should leave.
Power source is one element from battery flashlight KBS-L-0,5 or PBS (FMC).
Details of fishing rod are mounted on laminated bakelite circuit Board size 20x60 mm and a thickness of 1.5 mm, attached to the base of the relay screws.