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  1. Jouellet

    Advice needed for an 100W LED

    OK, I bought a couple of 100W LEDs. They have the following specs:: DC32-36V 3500mA Since I want to use them in my truck, I also bought a couple of 150W, DC-DC converter, 10-32V-in/12-35V-out. Now, I'm pretty sure that if I connect them directly to the output of the converter, that's not the...
  2. Jouellet

    T-1000 LED controller - Anyone know of something similar ?

    Hey folks, I want to control a bunch of WS2812B LEDs: 384 LEDs to be precise. I found that the T1000S can do that, but not exactly what I need: It has an SD card, that stores the pattern (actually, up to 16 patterns or programs) , and by pressing a button, you switch from one program to the...
  3. Jouellet

    can't figure what the hell is wrong !

    hi folks, working on something: it's a Seven Segment display, make with 10mm LEDs, driven by an Arduino. So far so good. The LEDs are in fact 3 x LED in serial, with a current limiting resistor, connected to ground. These are going to be powered from a 12 V source (no choice; LED are 3.2V x...
  4. Jouellet

    Attiny85 vs Pin 1 as an Input

    Hey ! working on something that will use an Attiny85. In a nut shell, I want to detect the presence of something, and via I2C, control 3 LEDs (R,G,B) So far, I have found most of my information, but still struggling with pin 1. My planned pin-out is as follow: 1- TCRT5000 sensor 2- Red LED...
  5. Jouellet

    Thinking about opening an Electronic store: still worth it ?

    Hey ! I would like to get your feel about a project of mine. I live in Edmonton (Canada, population 1.2 million), and when it comes to find electronic components, there is very close to nothing available. There is one that is mostly industrial-oriented: no price on items, need an account...
  6. Jouellet

    Need advise - Screwed up on my PCB - Need replacement part

    Hi Folks, I just received a bunch of PCBs that I ordered. When I tried to assemble the first unit, I realised that I've screwed up with my design. NO, I did not test it before, as it was "so simple" ...call it being dumb, overconfident, cocky, etc ...Mea Culpa ! Here's the deal: I have a...
  7. Jouellet

    video generator: guidance needed

    Hi folks, another project: I have the signal from a camera. It's output is in HDMI format. I need to be able to "encode" some information into the image, such as pre-defined location and distance (given by an encoder. could be Arduino driven) my first thought was to use a Raspberry PI to...
  8. Jouellet

    PCB: panel vs single board

    hi folks, Lately, I had my first "professionally made" PCB done. The deal was that it had to be below 100mm x 100mm One if my design was way smaller than that so I thought "I'll just put more than one per board" thinking I just had the "idea of the year", while staying below the 100x100 limit...
  9. Jouellet

    Getting started making PCB with software like Eagle

    Hi Folks, I just want to share my experience of getting started with my first "professional-like" PCB. For years, I've made PCB: first using a pen, on bare boards, then migrated to tape & rub-on kit. The next step was using positive sensitive boards. That allowed me to produce more than one of...
  10. Jouellet

    Call Progress tone

    Hi Everyone, I'm working on (another) project: I need to hack an old rotary phone and when the proper number is dialed, a dry contact is activated. The phone IS NOT connected to any phone line. when people are picking up the phone, I want to generate/simulate the "Call Progress" tone, to make...
  11. Jouellet

    Detecting A Knock Pattern

    Hi everyone, I'm looking for a way to detect a knock pattern. something like: toc----toc---------------toc Getting the 'toc' shouldn't be a big problem: I'm planning on using a microphone or a piezo, and detect 'spike' of signal, corresponding to the knock themselves. I mostly use Arduino...
  12. Jouellet

    Need advise on charging Li-Ion battery

    Hi folks, I bought a couple of these: http://www.ebay.com/itm/121845454110?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT and a couple of these: http://www.ebay.com/itm/351633458803?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT my need is to put 2 batteries in...
  13. Jouellet

    Loss of voltage with MOSFET

    Hi folks, I need to pick your brain here... I'm designing a circuit, that will control the speed of a DC motor. it's a geared motor (electric window motor) The circuit looks like this: I know that the voltage out of the charger is far from being perfect, but having a battery shall make it...
  14. Jouellet

    anyone ever used Positiv20 ?

    Hi ! finally was able to get some cans of Positiv20. Anyone ever used that stuff ? Got some good result ? I cannot get any decent result with it ! Tried to spray thin coat/thick coat, tried different exposure time...results are not impressive ! for those wondering what this is, it is a...
  15. Jouellet

    Is this a good/stupid idea ? LED in //

    Hi Folks, I want to build a seven segment display, about 6" high. each segment will have approx. 8-10 LEDs. LED that I'll be using are rated 3.2-3.4 volts, 30 mA. Supply voltage is going to be around 12 V Normally, one should do the math, put a couple of LED in serial, calculate the limiting...
  16. Jouellet

    transistor switching question

    I'm working on a project where I need to drive 3 big SSDs (3") over I2C In order to do so, I'm using an Arduino Nano as the slave, that will extract each digit and drive the proper SSD. My SSD are Common Anode. I already built a circuit behind each SSD, that receive a 5 V. signal, and drive...
  17. Jouellet

    Lens info needed

    I know, it's not really an electronic question, but it started as an electronic idea !! I'm looking for info on which lens might be needed: I want to group a couple of hi-power LED, let's say on a 2-3" (5-8 cm) diameter, and focus the light as a beam, something like what you see in...
  18. Jouellet

    Looking for Positiv20 or PRP200

    Hi everyone, As mentioned in the title, I'm looking for some Positiv20 or PRP200. These products seem easily available in Europe, but in Canada, it 's impossible to find !!! All european distributor won't ship oversea So I'm looking for a fellow hobbyist, who could buy me a can and ship it...
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