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Electronic hypnotic device 1

Published:2011/8/1 2:50:00 Author:Ecco | Keyword: Electronic , hypnotic device

Electronic hypnotic device 1
This example describes the electronic hypnotic device made by discrete electronic components , which will issue the simulated dripping water sound of tick, tick, tick when working. If insomnia intently listens to this sound of water, then he will quickly fall asleep. The working principle.The electronic circuit is composed of the oscillator circuit and timer circuit, and it is shown as Figure 9-138. Oscillator is a relaxation oscillator composed of single-junction transistor VU and resistors R2, capacitor C2 , which outputs the narrow pulse signal with width in 1.2ms, interval in 1.4s, it emits the dropping sound by HA. Timer circuit consists of transistors Vl, V2, and starting button Sl, termination button S2 etc. It is used to control the oscillator work. Pressing the Sl, capacitor Cl is fully charged at the moment, V2 is on as the base being positively biased, so that Vl is also conducting, +9 V voltage is added to the oscillator Vl (c, e pole), the oscillator makes oscillation. About lh, Cl end the discharging (via resistor Rl, and V2, b, e node discharge), V2 and V1 are off, the oscillator stops. In the oscillator working period, If you click S2, then the Cl will discharge rapidly through the S2, so that V2, V1 are closing, the oscillator stops. (View)

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SOUND_LEVEL_MONITOR

Published:2009/6/25 20:50:00 Author:Jessie

SOUND_LEVEL_MONITOR
Loudness detector consists of a 555 IC wired as a Schmitt trigger. The output changes state—from high to low—whenever the input crosses a certain voltage. That threshold voltage is established by the setting of R4. (View)

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Electronic hypnotic device 3

Published:2011/7/29 3:01:00 Author:Ecco | Keyword: Electronic, hypnotic device

Electronic hypnotic device 3
This example describes a simple electronic hypnosis device circuit, it has less circuit components,and it iseasy to make. The working principle. The electronic hypnosiscircuit is non-steady-state multi-harmonic oscillator circuit which is composed ofthe time base ICand relatedexternal components, it is shown in Figure 9-140. After turning on power switch S, +6 V voltage is applied to 4 feet and 8 feet of IC to provide power supply for the IC. After multivibrator oscillation, the pin 3 of IC outputs low-frequency oscillation pulse signal, and it is combined by the capacitor C2 and added to the speaker BL, then it issues the simulated sound of dripping water. The voice has hypnotic effects for insomnia. Adjusting potentiometer RP can change capacitor Cl and the operating frequency of multivibrator. The selection of componentsR selects 1/4W carbon film resistor. RP uses small solid potentiometer or sealed variable resistor. Cl and C2 select the electrolytic capacitor with voltage in lOV. IC uses NE555 or μA555, LM555, 5G1555, FX555 and other models of time-base integrated circuits. (View)

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Electronic hypnotic device 4

Published:2011/7/29 2:43:00 Author:Ecco | Keyword: Electronic , hypnotic device

Electronic hypnotic device 4
The electronic hypnotic device described in the example can generate simulated sound of dripping water and be used for the treatment for insomnia. The working principle. The electronic hypnotic deviceis composed of the oscillator circuit, boost charging circuit and the rain sound formation circuit, it is shown in Figure 9-141. Oscillator circuitis composed of the battery GB, control button S, transistor V, potentiometer RP, resistor Rl and Wl, W2 windings of oscillation transformer T. Boost charging circuitis composed of the W3 winding of T, rectifier diode VD and capacitor C. The sound of raindrops forming circuit is composed of resistors R2-R5, neon lights HLl-H4 and buzzer HAl-HA4. R1-R5 select 1/4W metal film resistors. RP uses multi-turn wirewound potentiometers. C usesaluminium electrolytic capacitor with the voltage in 400V, the leakage is aslowas possible. VD selects lA, l0OOV rectifier diode. V uses 3AX31 germanium PNP transistor. HAl-HA4 use HTD-27A piezoelectric buzzer with help tune. (View)

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Headache electronic physical therapy device circuit diagram

Published:2011/5/11 4:20:00 Author:Ecco | Keyword: electronic physical therapy device

Headache electronic physical therapy device circuit diagram
Physical therapy device circuit diagram is shown as the chart. The complementary type square-wave generator is composed of transistor VT1, VT2, and space multiplier is boosted by transformer T, then output by at a and b ports by BP2. H stands for NH - 416 type neon bulb. When the circuitry works, it will shine, indicate working status. RP1 is a type of frequency adjust potentiometer which can adjust the oscillation frequency, and we can see it from the shine of H. RP2 is a type of output strength adjust potentiometer(with switch). T could use output transformer in common transistor radios, the original 8 Ω terminal connects connentor VT2. VT1 requires that β≥100, and VT2 requires β≥50. It needs a pair of pars of multimeter when using it, and one connects to port a of the machine, and the other one connects to port b. When paients have a headache, they could handle a par, and the other one connects to temple or frontal headache site, then open the power supply. Firstly, RP1 is put in the middle position, and make and gradually increase of RP2 until the skin contact par has the sense of acupuncture or movement. The strength of first physical shoulds not be too strong. It can be make paients feel good by adjusting PR1 to change the frequency. General physical therapy should be proper in 2 ~ 5 minutes, headache instantly disappears. If invalid, it need to be changed the frequency and appropriately increase strength, if we physiotherapy 5 minutes again, still have a headache, we will not have to try, and that explains this physical therapy device is not suitable for you. (View)

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Electronic smooth wheezing device

Published:2011/4/26 21:54:00 Author:Ecco | Keyword: Electronic , smooth wheezing device

This example describes an electronic smooth wheezing device which is made by discrete electronic components, it produces high-voltage stimulation pulse, which can play the role of adjuvant therapy for cough patient. The working principleThe electronic smooth wheezing device circuit is composed of self-excited multivibrator, the buffer amplifier and voltage generator circuit, it is shown as Figure 9-156. Self-excited multivibrator is composed of the transistor Vl, V2, capacitors Cl, C2 and resistors Rl-R4 and so on. Buffer amplifier circuit is composed of the emitter amplification tube V3, bias resistor R6 and geese coupling capacitors C3, C4. High-voltage generating circuit is composed of the potentiometer RP, resistors R8, amplified output tube V4, the garnet-type step-up transformer T and output socket XS. Self-excited multivibrator can generate the oscillation signal with frequency in 5OOHz, and it is amplified by the V3, V4 and transformer T, the outlet XS outputs pulse voltage which is more than lOOV. Rl-R8 select 1/4W carbon film resistors or metal film resistors. RP selects WH-l5 series or WTR series of small synthetic carbon with switch potentiometer. Cl and C2 choose polyester capacitors or monolithic capacitors; C3 and C4 select the electrolytic capacitors with voltage value being greater than lOV. Vl-V3 use 3DG6 or S9014 silicon NPN transistor; V4 chooses S805O or C8050, 3DGl2 and other silicon NPN transistor. (View)

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Electronic hypnotic device 5

Published:2011/4/26 6:15:00 Author:Ecco | Keyword: Electronic , hypnotic device

Electronic hypnotic device 5
The working principle. The electronic hypnotic device is composed of monostable circuit, self-excited multivibrator circuit and buzzer HA and other components, it is shown in Figure 9-142. Monostable circuit is composed of dual D flip-flop integrated circuit IC (Al, A2) and resistors Rl-R4, capacitor Cl, control button 51 and delay time selection switch 52. Self-excited multivibrator circuit is composed of the other D flip-flop A2 inside the IC and diodes VDl-VD4, resistors R5, R6, capacitors C2, C3. Pressing button S1, the flip is triggered by the monostable circuit, IC's Ql outputs high level, the multi-harmonic oscillator works, the Q2 of IC outputs 2Hz oscillation frequency signal, the driver HA issues a similar sound of raindrops to help people sleep. When the charging of Cl is over, one-shot circuit returns to steady state, IC's Ql outputs low level again, multi-harmonic oscillator stops working, HA stops the sound. (View)