On-Line #39 01 июня 1996

Железо

Iron - a light gun for the Speccy.

                 IRON


(C) L.D.E. SOFT


   Today I, L.D.E. soft, prepared for you another article from
interesting shemkoy for Spectrum, which is called "Light
pistol. "


   This is not my own development, but only a split secret and 
little-known wide circle circuit is very interesting gadgets 
for our beloved Spectrum. But I also spent Coy are the mental 
and material costs to you were able to calmly collect myself on 
this device prepared by my description. I also give the address 
of the manufacturer's light gun, this is for those who do not 
hold soldering iron in his hands. Maybe it will even be a kind 
of advertisement for this firm ...



   This lotion I found on sale at the old radio market, the 
year of commercials in 1994 ... Then this pistol worth 40,000 
tons RUB! Agree sum in those days considerable. Well, okay,

most importantly, worked normally and toys on this thanks. The 
gun make even a floppy disk with 4 (at the time) games, adapted 
for a light gun. Connect the gun to your computer is using an 
interface KEMPSTON joystick moreover, the design is thought to 
use virtually any type of interface (which I highly approve 
of). 


   But this miracle of technology suddenly disappeared from our 
Mitinskoe radio market and many of Moscow's (and other) were 
sinkliristy without this device.



   In addition, in the company description for the device was 
not given full electronic circuits, and all marked with chips 
and parts were simply erased. But I decided to repeat the 
scheme of the gun and tell it to all who wish to have around 
this lotion. After work, I have been successfully fabricated 
several of these pistols and everything works fine. 


   And play with this gun is much more interesting than
similar in principle to all known video deck Dandy.
The fact that the Spectrum-precise targeting to hit almost 
reaches up to + / - 1 pixel screen, and therefore need to aim 
all the rules, with foresight. And the so-called Dandy, 100 
points out of 100 can beat a blind man (this is not a joke). 
Therefore, a pistol on the Spectrum much cooler! 


   We now turn to the scheme:

                       R10 VT3 +9 in
VD1 C1 R6>


      R1 R3 R4

       VT1 R9 C5

               VT2 R8 8 ■ 10

                                                 9

   R2 C3 R7

                             1 ■ 3

               R5 February 1912 ■ May 11 ■ 4-C6

                                      June 13 R12

                             D1.1 C4>

                                       D1.4 D1.2 Exit
 List of radio:>
R1-1.2mOm R4-7.5kOm R7-220kOm R10-2.2mOm Total
R2-100kOm R5-7.5kOm R8-2.2mOm R11-7.5kOm
R3-1.2kOm R6-120 Om R9-2.2mOm R12-120 Om

C1-C4-10mkF 0.15mkF VT1-KT368B VD1-FD256
C2-C5-10mkF 4700pF VT2-KT3107 DD1-K176LA7 (K561LA7)
C3-22n C6-33n VT3-KT3107 powered battery "Krona"



   Now some of the technical data received from the 
accompanying description: 


   Power supply - battery "Krona" 9B (located in the handle
pistol). Shooting range - from 0.2 to 4 m. Output - open 
collector. Rate - up to 5 shots per second. The required 
brightness screen for confident shooting from a distance of 2 m 
- not less than 100 nits. Accuracy is at a distance 2m when 
using a TV with a diagonal of 51 cm + / - 1cm. 


   Connect the gun to various kinds of Kempston joystick:


   Connecting effected by means of four wires of different
Color:


   Green - 1-th output trigger buttons

   White - 2-th output trigger buttons

   red - the output data

   Blue - 9 in the charts

Option: I - joystick with the closure of the buttons on the 
negative (common) 


   --- Green Left

   Red --- Right

   White ----- common

   Blue ----- common

Version: II - joystick with the closure of the buttons on the 
plus 5c. (Num) 


   --- Green Left

   Blue ----- right

   White ----- common

   red --- total


   Certainly it is possible to reduce the number of wires 
coming up to 3, but will lose the ability to use various types 
of joysticks.



   Structurally, the scheme is going to a small shawl, which is 
placed inside the gun. It is desirable to screen the board and 
mounting bracket parts of tin, which is connected to the 
negative power supply circuits. Receiving the LED is placed 
directly on the board, as in the case is battery power, 
"Krohn." In corporate performance used a gun from the game 
"videosport, with optical lens in the barrel of the gun. But 
the body can be glued together, and himself, setting the trunk 
of any converging lens of suitable size for distance of 70-100 
mm from the photodiode. 


   If the scheme is properly collected from the healthy parts, 
the adjustment is only in the selection of the distance lens to 
the photodiode and install the latest focus of a lens. 


   Well, sort of, and all I can to help you. And now address
the manufacturer: TOO novine, 195299, St.Petersburg, POBox 87.

                         Denis (L. D. E. SOFT)
                            400-0436