Power Window Modification to get more Power Torque Motor!
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Kamis, 01 September 2011
DI BOX
Alat ini hasil usaha untuk menjaga kualitas suara yang baik/ stabil, tempo doloe digunakan cara mixing dengan menaruh mic di depan head cabinet speaker yang tidak efektif karena output impedance semakin kecil sehingga gain menurun.
Hal tersebut dapat diatasi dengan DI Box ini, yang mengatasi masalah terhadap impedansi, dimana ia akan mencocokan impedansi instrumen dengan impedansi mixer, sehingga akibat sampingannya noise bisa ditekan.
DI Box merubah signal unblance menjadi signgal balance
Ada dua output dari DI Box:
Instrument musik -> DI Box -> Parallel out: singal in=signal out (untuk ke ampli)
-> Low impedance: balance out (untuk ke mixer)
Sehingga ampli dapat diseting tanpa mengubah signal (monitor) ke mixer utama.
DI Box ada dua macam, aktif & pasif:
1. DI Box aktif berisi sirkuit transformer untuk mengkonversi (dari Hi ke Low impedance) dan sirkuit penguat. Ini cocok untuk instrumen musik yang frekuensi response lebar (atau banyak yang mengandung frekuensi rendah, bass, keyboard, dll).
2. DI Box pasif hanya ada sirkuit transformer saja.
DI Box yang baik memiliki banyak fitur di bodinya, semakin baik tentu sajasemakin mahal, perlu diingat bila menggunakan DI Box, sebaiknya anda menggunakan adaptor, karena batere 9V adalah hal yang boros!
Using Omni Wheel with Servo Motor
Power Glue between horn servo and omni wheel;
Related Item No. #ME01010 OMNI DIRECTIONAL 4MM (NARP)
Step 1
Start by cleaning up the surfaces you will be gluing. We use a small amount of rubbing
alcohol to denature any grease that may be present on the gluing surfaces.
Step 2
Using the small piece of sandpaper included in your kit, rough up the the faces of the
roller wheels, and sand off the small numbers on the servo wheels.
Don't spend a lot of effort on this, just rough them up for better glue adhesion.
Step 3
Glue each servo wheel face to the roller wheel. Don't use so much glue that you seal up
the hole for the servo mounting screw or muck up the function of the roller wheels.
One trick to make sure you have the wheel aligned is to hold it up to a bright light and
make sure the servo wheel's various circular patterns are concentric in the bore of the wheel.
Using Infrared Proximity as Encoder with Omni Directional Wheel
an omni-directional wheel as a caster. Such a caster system is described in the
omni-wheel caster idea page.
The sensor stares at the fixed caster wheel. The surface of the omni-directional wheel
is quite bumpy. The infrared sensor is sensitive enough to detect these bumps so the
output of the ranger will vary as the wheel rolls. By checking the sensor at regular intervals
and doing some additional processing, a robot can tell if it is rolling. If the robot detects that
it has no velocity (it is not rolling) when it thinks it should be rolling, it can be reasonably
sure that it hit an obstacle. Then the robot can perform an evasive manuver.
Robot Locomotion with Omni Directional Wheel
t's so interesting for us to try build like this:
1. Three Omni Wheel
This experimental robot uses three omni-directional wheels powered by hacked servos.
It is controllable by standard RC gear. We have a battlebot in the works which may
someday use this kind of drive train.
Explainations:
Top View Robot : schematic drawing of different movement possibilities and the
corresponding speed vectors of an autonomous robot with an omnidirectional
drive based on three omni-wheels.
Speed vectors (Colours Information):
1. Robot white
2. Driven wheel speed green
3. Compensated speed orange
4. Overall wheel speed blue
5. Center of rotation yellow
2. Four Omni Wheel
This robot is ideal for indoor and light duty outdoor activity. The steer using skid steering
(differential steering). By varying the speed or direction of the wheels will allow the robot to turn.
With high tractiontires this is difficult because the tires have to skid. Using the Omni tires allows
easy turns because the wheels allow side slip. This kit should only be used on level ground.
While the robot is plenty powerful to climb hills straight on, if the robot is sideways to a hill,
it will side slip down the hill.
Explainations:
Top View Robot : schematic drawing of different movement possibilities and the corresponding
speed vectors of an autonomous robot with an omnidirectional drive based on four omni-wheels.
How to assembly AAx4 Battery Holder
Related Items No.:#PW01016 (2 PIN HEADER BLACK HOUSING),
#PW02005 (TOGGLE SWITCH), #PW04012 (BATTERY HOLDER AAx4)
In this part, you will complete the battery pack and power switch harness.
This assembly requires a soldering iron and solder. Solder the red wire from
the battery pack to the middle post of the switch. Locate the red 6" wire that
has a crimp on one end. Solder the stripped end to either one of the outer posts
on the switch. Now plug the crimps into the red/ black housing. Locate the flat
washer for the switch (it has a small internal registration tab), the lock washer,
and the two hex nuts that are the mounting hardware for the switch and just
spin them onto the switch for now.
Modifikasi
Frequency Counter
Picture 1. Frequency Counter by Bp. Budi Kencana/ PT. PACK
Sebenarnya PIC programmer tersebut saya gunakan untuk hobi saja, saya sedang membuat aplikasi frequncy counter dimana dengan menggunakan PIC rangkaian FC menjadi lebih simpel dibanding dengan IC TTL.
Sumber applikasi FC saya dapat dari.
http://www.qsl.net/dl4yhf/freq_counter/freq_counter.htm
DC Motor Shaft Offset Modification
(Item No. # MT020210) from a torquey slow 120:1 ratio to a speedy 14:1 ratio.
A similar modification can also work with the DC Motor Shaft (Item No. # MT020210)
but it’s a bit more involved due to the crown gear used.
1. Take out the two screws and open up the gear casing, you may need to use a flat head screwdriver to pry apart the two half’s.
2. Remove the gear with the slip clutch (the output gear) as well as
the gear driving the output gear.
3. Remove all of the remaining gears except the one on the motor output.
4. Of the two smaller white gears you want to save the one with the bigger center gear, this one meshes better with the output gear (the one with the slip clutch).
5. The problem with simply removing gears is that the output shaft will be countersunk in the gear casing. To fix this problem you will need a spacer of some sort; one of
the unused gears works well. I use the green gear, but the other spare white gear could also be used. Be sure to clip away some of the edge of this spacer gear so that it doesn’t interfere with the gear works.
6. Slide the spacer onto the middle shaft.
7. Place the white gear we saved earlier (the one with the larger center gear) on
top of the spacer. You will most likely have to slide the small pinion gear on the motor shaft up a bit to get the pinion to mesh with the white gear. Slide the pinion so that the two gears are level. If you go too far he gear on the motor output won’t have enough grip.
8. Almost done, just add the final output gear (again the one with the slip clutch), snap on the motor casing and put in the two screws, that’s it. Done!
Modification Servo to Continious Rotation
If you need servo for continious rotation, you must un-assembly the case first,cut the pin stopper at main gear and de-soldering motor connection behind PCB Board,
and the last, desoldering potentiometer, replace existing potentiometer with
2 pcs Resistor (about 2.2K Ohm) as paralel connection.
Assembly again your servo motor, servo ready to continious moving now.
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