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IMPROVED SCHEMATIC by Bob Beck This 11/24/1996 page describes a "Plant Growth Stimulator" improved since my 1991 design. User-tested
for over two years, it is solid state (no relays), uses three (not seven) batteries, makes colloids, is much smaller,
lighter, silent, with battery saving features, and is available as a mostly-assembled kit complete with electrodes
and silver for about $100 US$. |
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| Copyright ©1996 Robert C Beck, D.Sc. | |||
| The first section (U1B) of the LM358 dual op-amp is a 54 (2 x 27 Volts peak per cycle) volt peak-to-peak square
wave oscillator. The second section (U1A) reverses polarity and provides ±27 Volts DC output of low impedance.
This delivers a Bi-Phasic, sharp rise--time output of ~4 Hz (not critical) for the biological cotton--covered stainless-steel
(or gold-plated) electrodes saturated with salt water before applying. Sharp rise--time is considered necessary
to provide higher odd harmonics to the stimulus, although "rounded" waveforms will feel different. The third section is a current--limited 27 Volts DC output from a separate RCA (or 2.5mm) jack for rapid generation of excellent ionic/colloidal silver in water. A three minute cycle in 8 Oz. of room--temperature water makes a ~3-5 PPM concentration. Op-amp section U1B's 4 Hz oscillator frequency is set by C1 (0.1 uF) and R1 (2.4 meg Ohm). It is configured as a comparator with hysteresis determined by R2 (150 k Ohm). Charging and discharging of C1 is done by the 180º out-of-phase signal through R1. R3 and R4 provide a set--point 1/2 the V+ to the comparator. This insures a 50% duty cycle square wave with an amplitude of slightly less than the ~27 Volt supply. U1A, the second comparator, is used to invert the output of oscillator U1B. A ~54 Volt peak-to-peak signal will be generated between the op-amps due to their outputs being 180º out-of-phase. U1A's current is limited by potentiometer R5 (100 k Ohm) and R7 (820 Ohm) and is set to individual user's comfort. The power indicator circuit consists of a bicolor (Red-Green) LED (CR1) and the series combination of two 18 Volt Zener diodes, D1 & D2, with power limited by C2 (22 uF, 35 Volt). This section of the device is automatically disabled when the 3.5 mm plug is inserted into its jack. Therefore the LEDs flash only when batteries sum is over ~21 Volts. If LEDs are dim or extinguished, replace with three fresh 9 Volt Alkaline batteries. C2 used as a limiter allows the LED to flicker on at 1/8 second intervals only as the square wave output reverses polarity. Users find this newer design highly satisfactory, trouble free and most efficient. |
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IMPROVED SCHEMATIC - Parts List PROPOSED THEORETICAL IN--VIVO BLOOD, HIV, PATHOGEN, PARASITE AND FUNGI
NEUTRALIZING DEVICE Note: These data are for theoretical, informational and instructional purposes only and are not to be construed as medical advice. Consult with your licensed medical practitioner. Hundreds have been built successfully if duplicated exactly as shown. |
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| LM358 CMOS Operational Amplifier (OP-AMP) chip (generic) |
U1 |
$ 1.00 |
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| 2.4 (or 2.2) meg ohm ¼ watt 5% resistor |
R1 |
0.07 |
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| 150 k ohm ¼ watt 5% resistor |
R2 |
0.07 |
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| 100 k ohm ¼ watt 5% resistor | 2 @ 0.15 |
R3, R4 |
0.14 |
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| 100 k ohm linear taper pot, ½ watt Caltronics P-68 |
R5 |
2.56 |
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| 150 ohm ¼ watt 5% resistor |
R6 |
0.07 |
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| 820 ohm ¼ watt 5% resistor |
R7 |
0.07 |
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| 0.1 uF 50 V (or higher) ceramic capacitor |
C1 |
0.45 |
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| 22 uF 35 V (or higher) electrolytic capacitor |
C2 |
0.25 |
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| 18 Volt Zener diodes (NTE5027A) | ½ Watt, 2 @ 0.79 |
D1, D2 |
1.58 |
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| Bulb: 6-12V @ 55mA or, 6.3V @ 0.075 A | Type ML612 or 7377 |
B1 |
1.34 |
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| Bicolor LED Red/Green | RS# 276-012 |
LED 1 |
1.19 |
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| Jack for electrode leads (3.5mm or 1/8" mono-phone jack) | RS# 274-251 3/$1.59 |
J1 |
0.53 |
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| Jack for silver wire leads (2.5mm or 3/32" mono-phone jack) | RS# 274-292 3/$1.59 |
J2 |
0.53 |
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| 3 Alkaline 9 V batteries, type 1604 etc. | 3 @ 1.25 |
3.75 |
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| 3 x 9 V battery snaps (clip-on connectors) | RS# 270-325 pkg. 5/$1.29 |
1.29 |
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| Misc. wire, solder, etc. |
0.50 |
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| Box, if used |
2.29 |
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| Bread-board, if used |
2.00 |
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| 8-Pin I.C. Socket, if used |
2.00 |
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| Lead wire with 3.5 mm plug, 6 ft., Mouser or Calrad Electronics |
0.35 |
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| Electrodes, stretch elastic, Velcro, cotton flannel, alligator clips, etc. |
5.00 |
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| Total Cost for improved do-it-yourself project |
$26.47 US$ |
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| All components listed above, check your local electronics store. | ||||
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Special Notes: |
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 Ensure the IC chip U1 (LM358) is wired correctly. The location of Pin #1 is shown at Left |
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