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Principle of cranial electrotherapy stimulation

2017-08-03 17:03  
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This article is cranial electrotherapy stimulator principles discussed. The principle of combining text comprehension is a good suggestion. The principle is very simple but very practical and effective. In the circuit form a narrow pulse IC1, IC2 2.5 Hz oscillator feeding. The chip generates various timing of the output pulse. Output pin 2 & 3 can be obtained easily shoot negative pulse also. Current output is limited to 600μa R2 and can be adjusted from 80 years to 600 years μa through R3. Flashes every two seconds the correct operation of the signal can also be used to set purposes. It can be omitted together with R4, greatly improved battery life. In order to obtain a more precise frequency settings with R1 = 1 meters, adding a 500 k trimmer in series with it. In this case, the frequency meter reading at pin 3 2.5 Hz IC1, or an oscilloscope 400 ms pulses to read pin 2, 3 or 10, to increase the fine adjustment. Settings can be adjusted with a simple fine count in the end a  LED  flash every two seconds. Earclips can use a small plastic clip and cementing the end of the line in a position to take appropriate contacts earlobe. Very simple earclips can use thin copper foil fillet 4 cm. 1.5 cm long. Wide, wire ends in the center, then fold the foil in two parts holding the earlobe. Ensure better current transfer, such devices typically have moisture that pad is inserted between the intermediate fragment conductive solution and skin. CEStimulator


R1_____________1M5  1/4W Resistor
R2____________15K   1/4W Resistor
R3___________100K   Linear Potentiometer
R4_____________2K2  1/4W Resistor

C1___________330nF  63V Polyester Capacitor
C2___________100μF  25V Electrolytic Capacitor

D1_____________3mm. Red LED

IC1___________7555  or TS555CN CMos Timer IC
IC2___________4017  Decade counter with 10 decoded outputs IC

SW1___________SPST  Slider Switch

B1______________9V  PP3 Battery

Clip for PP3 Battery 

Two Earclips with wires (see notes)



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