PicAxe Serial Download Cable (homemade From Scrap)

Introduction: PicAxe Serial Download Cable (homemade From Scrap)

I decide to make my PicAxe Serial Download  (Programming) Cable as i had all the needed parts.

It is very cheap to buy that cable but if you already have the scrap parts needed..

Step 1: Parts & Tools Needed...

1 x Female Din9 serial connector (DB9)
1 x Audio stereo jack (I take out one of my old pc front panel..)
1 x Audio stereo cable Male to Male

Soldering Iron
Solder Wire
Hot Glue Gun (optional. I use instant Glue)

Step 2: Prepare Components

Open the DB9 and solder small wires to pin2, pin3 & pin5 just like in the photo..

Identify the pins of the jack with a multimeter..

Step 3: Time to Solder Them Toggether & Measure It..

1 photo 1.000.000 words..

Use Continue Tester to check for bad soldering or short out..

Remember: Shaft = Orange(Rxd), Ring = Red(Txd), Tip = Brown(GND)

Step 4: Glue It!!

Step 5: Finished Cable..

Finished Cable ready to program PicAxe Microcontrollers...

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    7 years ago on Introduction

    Hi.Can you help me.please. what i must to do for connection between Picaxe and usb without DB9?


    Reply 3 years ago

    The problem you have is that the USB signal needs to be converted to an RS232 signal that the PicAxe can use. Many of the so-called USB to RS232 converters do not work. The official AXE027 programming cable from PicAxe works great, but costs over $20 delivered to the USA.

    The alternative I have found is this adapter cable that works great:


    It sells for $10.99 Canadian or $8.43 US. Although its listing states that it is for Mac, it comes with a mini CD that has drivers for Mac, Linux and Windows. I use it on a Win 10 32bit laptop with PicAxe Editor 6 and the included Windows driver which must be installed before the adapter cable is inserted to a USB port.

    My PicAxe chips are 08M2 that are part of Elenco Snap Circuit sets, so I made a converter from a plastic hooded female DB9 RS232 connector and three Snap wire connectors (yellow, orange and black, just like the original Elenco adapter cable that is a converted AXE027 cable). I purchased the female DB9 RS232 connector on eBay (https://www.ebay.com/itm/DB9-D-SUB-VGA-female-10pin-Terminal-Breakout-PCB-Connector-COVER-HOOD-SHELL-nut/302393572582?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649)
    for $4.00 US. It has screw connectors so no soldering is required. The Snap wire connectors are available from http://cs-sales.net/ for $0.85 US each, part nos. 6SCJ1 (18" black), 6SCJ3A (8" orange) and 6SCJ3B (8" yellow). I cut the Snap connector off one end of each wire, adjusting the longer black wire to the same length as the other wires. I stripped 1/16" of insulation off the cut end of each wire and installed them to the DB9 RS232 connector screw terminals. Black goes to Ground on terminal #5, yellow to RxD on terminal #2 and orange to TxD on terminal
    #3. My total cost for the adapter cable and the Snap Circuits conversion was $12.43 US.

    If you want to convert this adapter cable to match the OEM AXE027 programming cable, you would just replace the Snap connector wires I used with a wired 3.5mm stereo plug. The wire going to the tip (or end) contact of the plug connects to Ground on the female DB9 RS232 screw terminal #5, the wire from the plug's ring (or middle) contact goes to TxD on screw terminal #3 and the wire from the plug's shaft (or bottom) contact goes to RxD on screw terminal #2. In effect, this is the same as the original posting here.

    The female DB9 RS232 connector mates with the male DB9 RS232 connector on the adapter cable and the USB connector on the other end of the cable plugs into the laptop USB port. Clicking "Ports" in Device Manager shows the Prolific PL2303TA device in the adapter cable and the COM port to which it is assigned. To change the assigned port, double click on the Prolific device, select the Port Settings tab, click the "Advanced" button and choose any other available COM port from the "COM Port
    Number" pull down list. When running the PicAxe Editor program, make sure the correct COM port is selected for the adapter cable.

    Good luck!


    yes,.... i did tis cable but what abt the drivers to be installed...... tis cable is not detected in my PC... :(


    12 years ago on Introduction

    although it is an easy to build project i haven't find any guide here and i couldn't wait 3 days untill the shop bring it so i build one..

    i build it that way so i can easilly change the audio cable with a bigger one if i need..


    12 years ago on Introduction

    A neat little unit.  Of course, make sure you have a serial port available on your PC before building - A lot of laptops don't nowadays.
    (If not, you could always use a USB to serial converter.)


    12 years ago on Introduction

    thats not too far off wat i did XD
    tho i havent attached a connector to the pic end of the wires yet :P been breadboarding it..