Pulse-pattern electronics after Stanley Meyer: the analogue section (A. Mikas, August 2000)

One sheet of a three-page set, hand-lettered in German: Pulsmuster-Elektronik (für H₂O-Elektrolyse) nach Stanley Meyer, pulse-pattern electronics for water electrolysis after Stanley Meyer. This is the analogue section, Analogteil (1 von 3). It is signed A. Mikas and dated 18.8.00 in its top corner, the German order of day, month and year: 18 August 2000. Nothing else in the archive, or on the open web, carries the name or the sheet.

It is a builder's page, not Stan's: a German replicator, two years after Meyer's death, designing the electronics to make the waveform Meyer described. The other two sheets, the digital section and whatever followed it, are not held.

The text, and a translation

What the circuit does

It is a constant-current ramp generator, and a careful one.

• The reference. A divider of 2k7 over 10k from the 5 volt supply puts 3.94 volts on the op-amp's non-inverting input (pin 3).
• The current source. The LM358 drives the gate of the BSS110, a P-channel MOSFET, so that the voltage at the top of the 10 nF capacitor's charging resistors, P1 plus 6k8, matches that reference. That holds 1.06 volts across them whatever the capacitor is doing, so the current into the capacitor is constant: 156 microamps with P1 turned to zero, 2.1 microamps with it at 500 kΩ. A constant current into a capacitor gives a straight-line rise, which is the linear in the description, and holding it with an op-amp rather than a resistor is the temperature-stable.
• The slope. Into 10 nF that is between 15.6 volts and 0.21 volts per millisecond. P1 sets how steep the ramp is, so for a fixed start-to-stop time it sets how high the ramp gets, which is why the box says P1 = Amplitude.
• The ceiling. The sheet gives about 4 volts as the most the ramp can reach. That is where the current source runs out of room: 5 volts less the 1.06 held across the resistors is 3.94.
• Start and stop. The BC547C sits across the capacitor, driven through 220k from Q̄ of a 4013 flip-flop in the digital section. With the input low the transistor is off and the ramp climbs ("Start"); with it high the transistor shorts the capacitor and the ramp falls back to zero and waits ("Stop").

Why a ramp

The note at the foot says what it is for. The digital section makes bursts of pulses; this section makes the ramp; added together they give Spannung an Primärspule, the voltage at the primary coil: pulse bursts whose height climbs, burst by burst, and then resets. That is close to the gated pulse train Meyer drew for the primary of the Voltage Intensifier Circuit, pulses switched on and off in groups rather than a plain square wave, with an amplitude that climbs added on top. The sheet does not say what the amplitude ramp is meant to do to the cell; it builds the shape.

What is open

Who A. Mikas was, where the set was drawn, and the two sheets that complete it: the digital section with its 4013, and the third. The archive would like to hear from anyone who has them.