steam driven stepper motor power plant · 2019-09-23 · steam driven stepper motor power plant...

STEAM DRIVEN STEPPERMOTOR POWER PLANT

©2019 Lennie [email protected]

That design didn’t get very far. I scrounged through my project boxes and found one big enough to house all the parts.

WHAT’S OUT THERE?I looked at many different DC motor/generators driven by toy steam engines that were homemade or available to purchase. All were capable of lighting only a few LEDs.

CHECK THE OUTPUTI found the stepper motor. I used a drill motor to spin it and measure the voltages across the wires. 60 volts on one set and 60 volts on another. Wow! That means 120 volts. I had all kinds of ideas for the high voltage output.

The first attempt at building the Power Plant involved mounting the stepper motor on a metal base, similar to the other steam accessories.

Also years ago, I came across Charles Wenzel’s TechLib.com. I remember seeing a schematic drawing concerning stepper motors.

Years ago, I was given a stepper motor from a friend who was also into the electronics hobby. I thought, “What am I going to do with this?” I put it with the other parts that would never get used.

Stepper motors can provide a lot of electrical power. Wiring the motor for low voltage and high current is what LEDs need. Charles guided me in that direction. He’s been very helpful in other ways, too.

INITIAL SETUP

The circuit connections would be made with a small prototype board, home to electronic parts and jumper wires.

A BETTER WAY

FIRST STEPPER

ONLINE HELP

Now the entire setup is one unit!

I tore apart an office copier/scanner. I ended up with a number of salvaged parts: 4mm shafts that fit the pulleys of the steam accessories, springs, bearings, and... stepper motors!

It has room for two meters, a prototype board, stepper motor, and switches.

SECOND STEPPER

The best one has a decent size shaft and is rated at 5 volts. I’ll use it in Power Plant 2.

INTRODUCTION



This power plant is indeed, powerful. Power Plant 1 is fancier than 2 because the Radiation Meter in 2 is sealed and cannot be tampered with. It displays 0-5 Rads per hour which I use as 0-5 volts. A rotary switch selects 5 or 50 volt ranges. The lower volt meter is used as a current meter and the face is not altered to display milliamperes. I goofed when drilling the hole for the rotary switch. A small knob just fit.

Parts needed:Stepper Motor (new or salvaged from office equipment)Voltage Panel Meter (0-15 or higher range)Current Panel Meter (150mA minimum)Small Prototype Bread Board

Electronic parts represented in the schematic diagram

Rotary Switches (if desired)

SPST Toggle SwitchWire Connection Posts (of some sort)

A plastic case large enough to house all parts

POWER PLANT 2

POWER PLANT 2POWER PLANT 2

STEPPER OUTPUTPins 1+4: 30VPins 1+5: 30VPins 2+3: 30VPins 2+6: 30V

470µF (or higher)100WVDC (or higher)

Pin 5

+5VDC or higher

Pin 1

GND

Pin 4

Pin 6

Pin 2

Pin 3

D11N4002

D21N4002

D31N4002

D41N4002

SUPERIOR ELECTRIC6 CONDUCTOR

STEPPER MOTOR

SUPERIOR ELECTRICMeeting your mechanical

and electrical needs!

0-2000-500selectable

0-30-150-30selectable

mA

VBatteryTest/Auxiliary(optional)

DCGENERATOR

G

POWER PLANT 1

Switch on battery pack

Ni MH 3 cell (4.5V)6 cell (7.2V)

This link http://www.techlib.com/electronics/stepper.html takes you to Charles Wenzel’s Stepper Motor Experiments. Here you will find many exciting electronic projects: http://www.techlib.com/



ASTROSYN6 CONDUCTOR

STEPPER MOTOR

STEPPER OUTPUTPins 1+4: 5VPins 1+3: 5VPins 2+5: 5VPins 2+6: 5V

Pin 3

Pin 1

Pin 4

Pin 6

Pin 2

Pin 5

D11N4007

D21N4007

D31N4007

D41N4007

470µF (or higher)25WVDC (or higher)

GND

BatteryTest/Auxiliary(optional)

0-150 minimum

0-50-50selectable

mA

V

+5VDC or higher

DCGENERATOR

G

ASTROSYN POWERMeeting your mechanical

and electrical needs!

POWER PLANT 2

Ni MH 3 cell (4.5V)6 cell (7.2V)

This link http://www.techlib.com/electronics/stepper.html takes you to Charles Wenzel’s Stepper Motor Experiments. Here you will find many exciting electronic projects: http://www.techlib.com/





WHY A BATTERY?Having a battery backup is useful for trouble shooting the electrical portion of the steam layout. It also provides lighting when working in the shadows. Besides, it looks cool, too.

ORIGINAL BATTERY PACKThe three-cell battery backup provided enough power when the Power Plant was belt driven. The pack was removable for charging.

MORE POWER NEEDED

The Automatic Charger will charge four battery packs at once.

It takes an external power supply of at least 12 volts at 1 amp. The power adapter for the DC Motor Drive will be used to power this, too.

Now that the plant has “direct drive”, the voltage increased. The battery pack requires six cells to provide 7.2 volts. Two sets of six-cell battery packs will decrease charging intervals. I hope to make a battery pack accessory, but this arrangement will not be portable.

Two three-cell packs connected in series will produce 7.2 volts.

Automatic NIMH Battery Charger Circuit

Another set of two packs connected in parallel will double the current output but the voltage will remain at 7.2 volts. This arrangement will provide enough power to light the LEDs at an adequate brightness.

This handy circuit can be used to charge Nickel-Metal Hydride (NIMH) rechargeable batteries. I plan to build this charger for my steam layout.

CONNECTIONS

To Toggle switch

BATTERY BACKUP FOR STEAM LAYOUT LIGHTING

C11000µF

25V C20.1µF

R110k

R21M

D11N4148

S1START

C30.1µF

C41000µF

25V

R31k

R6100k D4

1N4148

R8100k

R91k

C51µF50V

LED2CORRECTBATTERY

Q1BC327

*R5150Ω2W

R4470Ω

Q2MJE2955

D21N4007

D31N4007

R71Ω 2W

P1 +12VDC to 18V maximum

P2 GND

B17.2V

NI MH3 CELL X2BATTERY

PACKS

Figure 1

LED1CHARGE

2

3

1 IC1TL072

8

4

Automatic NiMH Battery Charger Circuit using TL072

18V max

P3

P4



eleccircuit.com

AUTOMATIC NI MH CHARGER 2019

P2GND

SW

P3B+

P4B-

eleccircuit.com

AUTOMATIC NI MH CHARGER 2019

P2GND

SW

P3B+

P4B-

BC

E

P1+12V

IC1

TL072

54

81

BC

E

R5150Ω2W

LED1POWER

LED2CHARGE

R91k

R110k

R310k

R21M

R4470Ω

R6100k

R71Ω2W

R8100k

D21N4001

D31N4001

D41N4148

D11N4148C2

0.1µF

C11000µF

25V

C41000µF

25V

C51µF50V

C30.1µF

Q1BC327

Q2MJE2955

HEATSINK

FOIL SIDELAYOUT

The project is the NiMH battery charger circuit with automatic cutoff when fully charged. You can charge the batteries from 2-8 pcs, depending on an input voltage. In the circuit has two LED indicators.First LED, show charging status, when the battery is full, it will be off.

When the battery is full, its the voltage is compared at the IC1 will make an output at pin 1 of IC1 go to stop working of Q1. Then also causes the Q2-transistor stop. The end of battery charging and LED1 is off, to display that the battery is full enough. The amount of current in the charging battery of the project is determined at 800mA. By there is R7-resistor is a current limiter as above. The S1-switch, to start charging, in the case that the battery correctly. We also press S1 to recharge again, to test that battery is fully or not.

The circuit in Figure 1, when we connect a battery to both points P3 and P4. LED2 will glow up, in case all battery connects correctly. If battery reverse polarity, this LED2 go out, we need to check them again. Some voltage from the battery is compared to IC1. Which the TL072 is set in a voltage comparator circuit at between pin 2 and pin 3.

Second LED, connect the battery correctly.

The transistor-Q1 will switch on-off a working to transistor-Q2. So the current can flow to the battery. While the circuit is charging, LED1 will show charging status.

In case the voltage from the battery to charging each cell is still low. The output from pin 1 of IC1 will send to a transistor Q1.

The input voltage can use the power supply of 12V, 2A. At the charged current up to 800mA.

FEATURES

Battery & Charger / Hobby Electronic Projects / Mini ProjectsAutomatic NIMH Battery Charger Circuit

Because it is cheap and very common for AA cell in many Capacity as required. We can replace the generic battery right away.

A nickel-metal hydride battery, also known as NiMH, is a secondary cell. It is a type of rechargeable battery. They are used extensively, in cameras and other

electronic devices.

This is NiMH battery charger circuit with auto cutoff.

Lower capacity, 1700 up to 2000mAh can be recharged up to 1000 times 2100 to 2400mAh batteries can give between 600 to 800 times

Important. We can a new recharging a lot of times depends on its capacity.

The greater power capacity, AA 2500mAh rechargeable batteries can only be recharged approx 500 timesAll rate in slow charge mode.

BATTERY BACKUP FOR STEAM LAYOUT LIGHTINGClick this link: https://www.eleccircuit.com/automatic-ni-mh-battery-charger-can-make-by-yourself/ Apichet in Thailand, designed this circuit and many more.

He answered my questions. *R5 determines current.

steam driven stepper motor power plant · 2019-09-23 · steam driven stepper motor power plant...

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