P90 New Webpage.cdr - Action Electronics

www.action-electronics.co.uk
TWIN FLICKER
P90
Lighting effects unit
R/C ELECTRONICS
This microcomputer-driven unit can simulate such lighting effects as candlelight, oil lamps,
fires, and arc welding. The versatility of the unit should ensure that it will be useful in a wide
range of models including boats, caravans, doll's house fireplaces etc. It has two independent
bulb drive outputs (separate random flicker on each) You can, of course, fit more than one
bulb as long as the current load does not exceed 1/4 AMP (250mA); this equates to three Grain
of Wheat bulbs on each output, or six bulbs in all. It requires a 6V to 12V power source and, of
course, the bulbs must be right for the voltage you use. There is a rate adjuster on the PCB and
a series of links to effect the change of function.
LINK 1
Yes
Yes
No
No
LINK 2
Yes
No
Yes
No
VR1
Adjust as required
“
“
“
EFFECT
Oil lamp (white lights)
Open fire (use red & yellow lights)
Arc welding (blue/white lights)
Candle (white light)
Link 3 effects the depth of flicker, or the depth of dimming of the bulbs if you like.
SWITCH OR R/C
SWITCHER
46
BULB 1
32
BULB 2
20
+ve
-ve
Case Dimensions
Voltage of Bulb 1 and Bulb 2
are both equal to battery
6V TO 12V BATTERY
Circuit 1
Circuit 1
Circuit 2
Three bulbs in parallel in each
circuit are all equal to battery
voltage e.g. All are 6v bulbs if
battery is 6v
C
Action R/C Electronics
TO 6V BATTERY
Circuit 2
Total voltage of two bulbs in
series in each circuit is equal
to battery voltage e.g. All are
6v bulbs if battery is 12v
TO 12V BATTERY
www.action-electronics.co.uk
TWIN FLICKER
P90
Lighting effects unit
R/C ELECTRONICS
This micro-computer driven unit can simulate such lighting effects as candlelight, oil lamps, fires, and arc welding. The
versatility of the unit should ensure that it will be useful in a wide range of models including boats, caravans, doll's house
fireplaces etc. It has two independent bulb drive outputs (separate random flicker on each) You can, of course, fit
more than one bulb as long as the current load does not exceed 1/4 AMP (250mA); this equates to three Grain of Wheat
bulbs on each output, or six bulbs in all. There is a rate adjuster on the PCB and a series of links to effect the change of
function.
SETTING UP AND INSTALLATION
Connect bulbs as shown on the wiring diagram. The power supply should be between 6v and 12v. Note that one wire of
each bulb goes to the Positive + power terminal and the other wire goes to the outputs 1 & 2. Take care to get the
polarity of the battery connections correct or you will fatally damage the unit. Drill suitable holes in the ABS case to
enable the wires to reach the screw terminal connector blocks without kinks, and use Velcro pads to secure the case to
the inside of the model.
LINK 1
LINK 2
VR1
EFFECT
Yes
Yes
Adjust as required
Oil lamp (white lights)
Yes
No
“
Open fire (use red & yellow lights)
No
Yes
“
Arc welding (blue/white lights)
No
No
“
Candle (white light)
Link 3 effects the depth of flicker, or the ‘depth of dimming’ of the bulbs if you like.
These links can be removed or fitted when the unit is running and their effects noted. Experiment with
different combinations to get whatever effect you are looking for. VR1 can be adjusted to select the flicker rate that is
suitable for your application. Use a fine screwdriver in the slot of VR1 as shown.
With the battery connected and all links fitted on 1,2 & 3 , your unit should be flickering like a pair of oil lamps.
RECOVERY SERVICE
A recovery or repairs service ensures that you will not be left with a dead unit for any reason. The Service Charge for
this kit is £13.00 including parts (including return shipping cost IN UK).
All returns should include full Credit Card details (Name & Address of cardholder, Card Number, Expiry Date and
Card Security Number)
ACTION R/C ELECTRONICS, 1 Llwyn Bleddyn, Llanllechid, Bangor LL57 3EF, United Kingdom
MANUAL OR R/C
SWITCH e.g. ACTion P43
+
Remove links from pins
H1 to obtain variations
of effects
_
BULB 1
P90 Twin Flicker
Examples of different
variations of loads for P90.
1
VR1
2
BULB 2
-ve
Voltage of Bulb 1 and Bulb 2 are
both equal to battery voltage
Adjusting VR1
+ve
6V TO 12V BATTERY
Circuit 1
Circuit 1
+
+
_
_
1
1
Circuit 2
Three bulbs in parallel in each circuit
are all equal to battery voltage e.g. All
are 6v bulbs if battery is 6v
TO 6V BATTERY
Circuit 2
Total voltage of two bulbs in series in
each circuit is equal to battery voltage
e.g. All are 6v bulbs if battery is 12v
TO 12V BATTERY
Units are polarity-critical! Take care to connect the battery correctly!
The small print……….
ACTion R/C Electronics guarantee all products to be free from manufacturing defects for 12 months from date of purchase. This does not cover suitability for specific
applications; components worn or damaged by use, tampering or incorrect connection; alteration to original components; damage to batteries or other equipment
through use; misuse, or shipping damage. Where goods are found to be faulty, the customer shall return them to ACTion R/C Electronics in their original condition and
with their original instructions, packaging etc. Our liability is limited to repairing or replacing goods to their original specification and will not exceed the cost of the
goods. By using the product the user accepts all liability. Where a fixed repair charge is applicable, ACTion R/C Electronics shall undertake repairs to the extent that
they are judged economically viable. Where such is not the case then the customer will be offered the option of crediting the repair charge towards the cost of a new
unit or having the faulty unit returned and the charge refunded (less the cost of return carriage). We reserve the right to modify this guarantee without notice.
C
Action R/C Electronics Ltd
www.action-electronics.co.uk
P90 TWIN FLICKER UNIT
Instructions for Kit version
R/C ELECTRONICS
MODE LINKS
1
2
3
_
IC1
+
+
C1
K1
Q1
R1
LY
IC2
R2
_
1
K2
2
R3
C2
ON
Q2
VR1
C3
1 2 3
TOLERANCE
BAND (IGNORE)
Re-solder
VE
RS
IO
N
Component Layout
Good joint
PCB
Copper
pad
Soldering Tips
Action R/C Electronics
ELECTROLYTIC
CAPACITOR C1
POLY
CAPACITORS
C2 & C3
RESISTORS
NEGATIVE
BAND
Component mounting details
5v low-dropout regulator (various numbers from different manufacturers)
PIC12C508/04 (programmed) IC + 8 pin IC socket (see notes on handling)
MOSFET transistors (marked ZN2106A)
Zero ohm resistor (one central black band)
220 ohm resistor 1/4 watt (RED/RED/BROWN)
47k ohm 1/4 watt (YELLOW/MAUVE/ORANGE)
1M miniature trimmer (adjuster)
10uf min radial electrolytic capacitor
0.1uf poly capacitor (marked .1 J 63)
0.22uf poly capacitor (marked .22 J 63)
2 x 3-pin headers and 3 x links.
2 x 2-way screw connector blocks (interlocking)
Type RX2007
Type P90
Not supplied with kit - any fine flexible wire is suitable for bulb current
KIT
C
Re-solder
LINKS & HEADERS
1, 2 & 3
IC1, Q1, Q2
Trim
PARTS LIST
IC1
IC2
Q1,2
R1
R2
R3
VR1
C1
C2
c3
1,2,3
K1,2
Case
PCB
Wire
Resistor colour bands
P90 KIT INSTRUCTIONS
PCB
The PCB has an insulated (Component Side) and a tinned track side. Components are mounted on the insulated side and
soldered on the track side. The PCB for this Project is fully prepared and requires no additional work. Look carefully at the
area of the PCB you are working on when soldering to ensure that you do not apply an extra connection with a splash of
solder
TOOLS
For construction you will require a soldering iron with a fine pointed bit and flux cored solder (22 SWG recommended); a
small pair of wire cutters, a screwdriver to make connections and, of course, a good level of light.
VE
RS
IO
N
ON
LY
PARTS - DO NOT HANDLE ITEMS IN BLACK CONDUCTIVE FOAM UNTIL INSTRUCTED. (MOS DEVICES)

The short bars with colour bands and a wire at each end are resistors R1, R2, & R3. R2 is 220 Ohms
(RED/RED/BROWN) and R3 is 47K Ohms (YELLOW/MAUVE/ORANGE) The third one with a single black band is a Zero Ohm
resistor R1. The drawing shows the order to read the colours.

The tubular electrolytic capacitor (C1) is marked with the value and working voltage; it also has a band down one
side of the plastic sleeve with (-) Negative sign on it which signifies which leg goes to the negative. Capacitor
polarisations (+ and -) are clearly shown on the drawing.

The square white components with two wires on one face are poly capacitors. C2 (marked .1 J 63) is 0.1uF and C3
(marked .22 J 63) is a 0.22uF. They can be fitted either way round.

The 3 legged black plastic moulded part with a half-moon shape looks like a transistor but is in fact an IC. It
ensures a stable voltage for the microcomputer when running on any voltage from 6V to 12V. Note the curved side of
it and fit as per the drawing. Although not an MOS device, care should be exercised when handling and fitting it.

The 8-pin integrated circuit (IC1) is marked with its type code; see the drawing together with the Parts list. It is
delivered in conductive foam and should be left in the foam until you are about to fit it. Being a MOS device, it can
be damaged by static electricity and care must be exercised when handling. It is supplied with a socket. This will
enable the builder to solder in the socket during construction, then fit the IC at the end of construction.

The MOSFET transistors (ZN2106A) have three legs and a black plastic body with a silver printed side which is also
slightly rounded at each side. These are MOS devices and care must be taken in handling. They must also be fitted
as shown. Note the slightly-rounded corners on the component and ensure that they are fitted as in the drawing.

The three-pin mouldings with long gold-plated pins one side and shorter extensions the other side are known as
headers. The short-pin end goes through the PCB for soldering, leaving the long-pin ends sticking up. These are the
pins to which you will fit the links. The link is the tiny moulding (normally red) with a metal strap inside it which
shorts out the two pins when fitted. The three links are used to select the different characteristics of flicker being
simulated.

The square black moulding with a white circle in the middle and three pins is VR1; a variable resistor for flicker rate
adjustments.

The two 2-way screw connectors (K1 & K2) interlock to form a 4-way connector.
KIT
CONSTRUCTION
NOTES ON CMOS DEVICE HANDLING. USE A SHEET OF ALUMINIUM, COOKING METAL FOIL WILL DO.
Place it on the work surface. Place the PCB, solder side down on it. Place the black conductive foam on it, touch the metal
with the soldering iron tip and then rest your hands on it, holding them there while you read through this part of the
instructions. The PCB, any tools, the MOS IC and you are now all at the same potential, i.e. static-neutralised.
As few parts are used in the construction of the 'TWIN FLICKER', full construction notes aren't needed, just a few pointers:

I would suggest that you fit the socket for IC2 first, it will help to give you your bearings as to what goes where.
Note the small notch at one end of the plastic moulding and ensure that it is fitted as shown in the drawing, soldering all pins
carefully.

Resistors can be fitted any way round, as can C2 and C3, but C1 (10 uF electrolytic) must be fitted with care. The
negative marked on the sleeve of it faces the outside edge of the PCB. When fitting and soldering the connectors K1,
K2 note that the face with the holes for the wires must face the outer edge of the PCB so you can fit wires to them.
That may seem obvious but it has been known to be done wrong!

The adjuster VR1 will only fit one way round. You will have to press down firmly to ensure that it is flush with the
PCB where the pins are a bit wider. When you fit IC1, note the curved side on the moulding of the component and
make sure it matches the curve on the drawing to ensure that it is fitted the right way round.

Fit the MOSFETS (ZN2106A) next. Note also the curved side of the MOSFETS on the drawing and ensure in each case
that they go the right way round.

The 8-pin IC should be plugged into the IC socket as the last operation of construction.
WIRING
Connect the bulbs as shown, one wire to an output and the other to Positive (+) screw terminal connection. When connecting
the unit to the battery do make sure that you get the polarity correct. It takes only a moment to destroy this unit by getting
this wrong, so check twice before connecting once.
The rear of the board can now be cleaned with something like an old toothbrush and some spirit cleaner. Meths will do but
Isopropyl is very much better. Then check all over the soldered side of the board for good joints and no solder bridges
between tracks or round pads. That's the PCB construction completed.
WARNING - DO NOT use the black foam as packing in the finished unit, it is CONDUCTIVE.
P90 TWIN FLICKER UNIT
PHOTOGRAPHIC BUILD SEQUENCE FOR KIT VERSION ONLY
PICTURE 1: PCB with I/C socket & headers fitted
PICTURE 3: Semiconductors fitted
PICTURE 2: Resistors and capacitors added
PICTURE 4: Preset, screw terminals and PIC
chip fitted NB ANTI-STATIC PRECAUTIONS
ARE REQUIRED
PICTURE 5: File slots in case for leads. Fit lid
and sticker

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