DIY Infra-red ? - Page 6 - RC Groups
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Jan 04, 2003, 08:21 AM
Thats NOT indestructible
j8m8l's Avatar
Hi Chippie

Is the transparancy method for photoresist?

The main info on this stuff is here

It is all in japanese, so you will have to run it through 's translater

There is also info on the RX chip (the rest is on the above site)

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Jan 04, 2003, 09:24 AM
Registered User
Hi j8m8l, thanks for your reply.

The tutorial is based on my experiences with photoresist board and transparencies.

I have managed to reproduce boards with a good degree of repeatability.......the quality of the boards is very good using the photo method.

I tin my boards after etching and drilling to give a better finish.
Sadly the only thing lacking now is the "green" anti solder finish...but I'm sure in years to come that process will become available to the amateur.....I use Eagle - Lite software for my plots.

BTW thanks for the links

Jan 04, 2003, 11:23 AM
Registered User
I've used the Sharp IS1U60 (IR Remote control receiver) available from RS components. A bit big by the standards of the serious micro guys here but very easy to use. If you use the Tx encoder out to drive the IR emitters you can feed the IS1U60 output direct into a 4017 decoder. Dead simple.

To be fair I've so far only used it on a C/L plane with the emitter(s) on the handle which is nice and simple. The receiver is always pointing directly at the emitter (unless your lines break ).

Jan 04, 2003, 05:13 PM
Registered User
Anyone following this thread know of a site
that has information on building a PIC
programer for the 12C508/509 series chips?
also would like locate software for above.
I spent sometime building up a LED modulator using a 555 chip running at 40khz connected
to a old Futaba fG transmitter via trainer jack
looks good on scope will have to wait for
sensors to come in in order to test.
Jan 04, 2003, 06:30 PM
Registered User
jberg's Avatar

and the original programming tool from the PIC manufacturer:

Regards, Jochen
Last edited by jberg; Jan 04, 2003 at 07:16 PM.
Jan 05, 2003, 02:45 PM
Was that my 15 minutes?
Andy Birkett's Avatar

I'd still recommend as a cheap DIY programmer that works well with ic-prog (as opposed the Microchip offering). I have programmed a lot of PICs with this combination with little trouble and the programmer can be made from components that are often just lying around

Jan 06, 2003, 07:05 PM
Registered User
Tnx Andy
I downloaded PIC-PROGRAMER schematic anything special about the BC547b transistors? Also can you direct me to where I can find IC-PROG?
Will the above programmer and software read
code from clip if it's not read protected?

Has anyone done any work on optimum sensor
geometry using two sensors back to bacy or at 90 deg. Also how many LEDS in transmitter fo good coverage in gym?

Jan 06, 2003, 07:19 PM
Registered User
jberg's Avatar
Originally posted by joe price
Also can you direct me to where I can find IC-PROG?
Look three posts up!

Regards, Jochen
Jan 06, 2003, 09:54 PM
Registered User

DIY Infra-red ?

This site gives pinouts for the RX2C chip which is used in the "Thunder Racer" Bitcharger clone. but for IR use. See my post at "Bitcharger secrets":

Jan 06, 2003, 10:22 PM
Registered User
Koichi Tanaka's Avatar
The infrared control unit using 55 infrared light emitting diodes was set to the transmitter, and the airplane was flown in the gymnasium of 45mx36m.

The airplane flew satisfactory with the 0.76g infrared receiver which used one infrared sensor.

The infrared unit attachment parts which Mr. Yamao made.

The part was attached in my infrared control unit.

The infrared control unit was set to the antenna.
Last edited by Koichi Tanaka; Nov 04, 2005 at 08:43 PM.
Jan 06, 2003, 11:12 PM
rebmeM roineS
MrBungle's Avatar
Originally posted by joe price
I downloaded PIC-PROGRAMER schematic anything special about the BC547b transistors?
Nothing special about them, just standard run-of-the-mill BC547's will do.

Also can you direct me to where I can find IC-PROG?
I've been fooled by this site more than once, click on the screenshot image of the program for the link, then scroll down the menu and click 'Download'.
OR click this:

Will the above programmer and software read
code from clip{chip? - MrB} if it's not read protected?
Sure will.

Jan 14, 2003, 10:17 AM
Registered User
Thanks for all the help guys
I built the jdm programmer, downloaded ic-prog and
tested with 12c509 everything works great.
Now where can I find code for the ir receiver?

thanks again
Jan 14, 2003, 04:34 PM
Was that my 15 minutes?
Andy Birkett's Avatar

I don't think you can just use the radio decoder from my site. I believe Jochen made a couple of modifications to make it work.

Jan 14, 2003, 06:10 PM
Registered User
jberg's Avatar
Andy, Joe,

as said before I am still not sure why the original code did not work for me. I think the lowest throttle setting of my Tx was either too low or not low enough to properly trigger the auto detection.

My modifications bypass the auto detection code, fixing the throttle to channel 3, and I adjusted the max/neutral/min pulse withs to fit to those that my second (none-computer) Tx uses. So the modifications are not related to wether an IR sensor or an rf receiver are used in front of it. I am using that Tx (Multiplex Pico) for IR stuff and use my computer radio (Futaba FC-16) only for rf systems now.

I have tested my rx in flight last Sunday and have got a shorter range than I had expected after my first outdoor tests. Although I use 8 instead of 4 IR LEDs and 200 mA peak current per serial group of LEDs now I only got a range of about 20m, this is about half of the big gym's length that we have for our club's indoor meetings. Perhaps the strong fluorescent lighting together with the many roof windows disturbs the IR connection. It was around noon, by the way, when I tried the system, so a lot of sunlight came down through the roof windows.

I plan to try it again with more LEDs and I will keep you informed. If I find the time I will also try to get Andy's original rx PIC code running.

Regards, Jochen
Last edited by jberg; Jan 14, 2003 at 06:14 PM.
Jan 14, 2003, 08:49 PM
Registered User
Koichi Tanaka's Avatar

About the required number of the infrared rays IR LED used for a transmitter

In order to double notification distance, 4 times as many IR LED as this is required.
For example, if there is notification distance of 20m by four Light Emitting Diodes, 16 IR LEDs are needed for securing the notification distance which is 40m.
I am using 55 IR LEDs now. Peak current is about 700mA.
However, since average current is set to 60mA, there is very little the consumption current as compared with RF transmitter.
Since the directivity of IR LED is strong, each IR LED is set in the shape of radiation, and the intention nature is eased.
Notification distance will become somewhat short if it does so. Many IR LEDs were used in consideration of those things.

The daytime flight test was performed in the gymnasium of glazing using this transmitter. There is 45mx36m width. Although tested with both the receiver of one sensor, and the receiver of two sensors, both flew satisfactorily.There is notification distance of enough of 50m.
It is the picture which is flying with the receiver of one infrared sensor in the very bright gymnasium of daytime.
Last edited by Koichi Tanaka; Nov 04, 2005 at 08:43 PM.