Art and Technology are Friends

Wave JT – Kit and PCB

Wave JT is a tiny LED sequencer or “Larson Scanner” on steroid. It has over 16 sequence patterns, and speed can be adjusted by double/triple tapping the button. It’s the most versatile LED chaser.

Unlike other LED chasers, Wave JT controls each LED in smooth 7 bit (128 levels) brightness levels. The brightness curve is gamma-corrected like Aurora series, so the fades are visually pleasing.

Not only Wave JT versatile, it’s also energy efficient. Wave JT runs on a single AA battery, and the battery lasts for days!

> See more pictures and video

Please view technical details and assembly instructions at instructables.

Wave JT is made with 100% through hole parts. No surface mount parts!

Kit Contents
8x 3mm or 5mm Super Bright LED of your choice
1x 4.7k ohm (R1)
1x 100k ohm (R2)
8x 39 ohm (R3-10)
1x 10pF Ceramic Capacitor (C1)
1x 0.1uF Ceramic Capacitor (C3)
1x 33uF 10V Electrolytic Capacitor (C2)
1x 47-100uH Axial Inductor (L1)
1x Schottky Diode (D1)
1x 5.1V 500mW Zener Diode (D2)
2x MPS2222A or equivalent NPN BJT (Q1-2)
1x PIC16F1823 or PIC16F1824
1x Tactile Switch (SW1)
2x Battery Clips

Note: As of Oct. 1, 2012, all Wave JT kits are shipping with preprogrammed PIC. You do not need a PIC programmer to assemble Wave JT kits!

*** Purchase Here ***

20 Responses

  1. Daniel B.

    Based on the pictures and the videos, this is a nice product.

    As long as everything is assembled and soldered properly, we should end up with a fully functionnal circuit.

    Unfortunately I ended up with a wrongly programmed microcontroller.

    From left to right, the leds are labeled Led1 through Led8. For instance, with the chaser effects, the leds should be sequentially lit from 1 to 8, however on my unit the sequence is 1,2,3,4,6,5,8,7 which leads to a broken effect.

    There is an effect where only one led is flickering and there is another where all the leds remain solid.

    Obviously, there is a problem with the PIC itself. I’ve been lucky enough to think about installing a socket for the chip, so it will be a breeze to replace.

    Here’s a clip showing what is happening :

    Aki, I will need a replacement for that chip, so could you tell me how we can proceed ?

    Happy LedArt’ing !!!

    May 10, 2014 at 1:02 pm

    • Daniel B.

      Update : I got some feedback from Aki. There was an error in a group of PICs that were programmed with another version of the firmware, a test version I would be lead to believe.

      Anyhow, arrangements were done in order to re-program the uC correctly.

      We’ll see how things work out.

      May 10, 2014 at 5:03 pm

  2. Mike

    Hi, can this be modified to run a bar of 4 LEDs off each channel?

    February 8, 2014 at 4:53 am

    • Since Wave JT is made to be a low current circuit, driving more LEDs would be difficult without some circuit modifications.

      February 9, 2014 at 1:33 pm

  3. Rick VanHuss

    Help please.

    The blue led’s have the flat on the cathode side, while the pcb shows a square pin and a common negative round pad (right?). Is the square pad positive? On the pcb, is the round common pad negitive? Making the flat on the led OPPOSITE from the pcb layout?


    January 29, 2014 at 11:06 pm

    • The square pads are for anode (positive), round pads are for cathode (negative) on the Color Organ PCB.
      Hope this clears the question.

      January 31, 2014 at 2:03 am

  4. chiaroscuro

    What are the dimensions of the assembled unit, please?

    December 2, 2013 at 8:54 pm

    • The PCB is 2.1 x 0.9 inches and overall height with battery is about 1 inch (from the bottom of the battery to the top of the LED).


      December 2, 2013 at 9:02 pm

  5. Kurt Lee

    I had bought 2 sets of Wave JT, and placed another order just few days ago. I had assembled it for the first set, unfortunately spoiled 1 of the PIC during soldering for the 2nd set. Is there any chance to offer me by allow me to buy 1pc of PIC only?

    November 17, 2013 at 10:05 am

  6. GingGangGooly

    Once again a great circuit, firmware & PCB. Just built my 1st WaveJT, I can see me investing in some more PCB’s to make colours other than Green.
    Keep up the good work, I love the different patterns!

    April 10, 2013 at 5:57 pm

  7. jdmaag

    Hi,I want to use these on my dock lites. Is there any points I can hook to so that when voltage is apply it will come on. I don’t want to use the switch. The solar dock lites already have a joules thief build into the circuit.

    April 9, 2013 at 10:22 am

  8. CLimon

    Will this circuit work with the color-changing LEDs from your Color JT? It would look amazing if it changed color.

    December 19, 2012 at 2:35 am

  9. Jazzy

    Hey! I planning on using this for a project. My question: what is the actual length and width in meters of the board? Sure it’s small, but how small is it? Plz answer!

    November 26, 2012 at 11:28 am

    • Hello Jazzy,

      The dimension of the PCB is 2.11 x 0.88 inch or 53.6 x 22.5 mm.


      November 26, 2012 at 11:37 am

      • Jazzy

        Thank you!

        November 27, 2012 at 11:36 am

  10. Awesome.
    Been looking for a circuit to add into a space cruiser console for my sons bedroom.
    Through this would be great to modify, run of DC supply, custom mount leds and integrate to custom buttons.

    Then nearly fell off my chair at the $17 shipping price to UK.

    Think I might get a US friend to by it and ship it over instead.

    November 18, 2012 at 2:04 pm

    • Hello Simon,

      I know that the international shipping is high, but that’s the cheapest (and still reliable) method I can find. (USPS Priority Mail)
      Being a tiny operation I don’t get the bulk rate from UPS or FedEx. I’m hoping that I will find a distributor in Europe soon…


      November 18, 2012 at 2:10 pm

    • Can’t guaranty, but most likely yes. Forward voltage 3v is fine. And so long as they have 2.5mm pitch leads.

      October 1, 2012 at 12:57 am

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