Shorty short finder branched and released as ShortyPen!

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • clearchris
    Badcaps Veteran
    • Dec 2013
    • 687
    • United States

    #1

    Shorty short finder branched and released as ShortyPen!

    News from eevblog:

    https://gitlab.com/jdobry/shortypen/

    https://www.eevblog.com/forum/testge...85/#msg4618285

    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30950
    • Albion

    #2
    Re: Shorty short finder branched and released as ShortyPen!

    time to see how much has changed.
    (how much of the parts i got are now useless)
    i already see the mcu is from ST in the pictures!

    Comment

    • clearchris
      Badcaps Veteran
      • Dec 2013
      • 687
      • United States

      #3
      Re: Shorty short finder branched and released as ShortyPen!

      The stm32 mcu is a great upgrade. As much as I have liked the arduinos, their time has long since passed. For a similar price to an arduino clone, you can get an stm32, an esp32 with wifi, or an rp2040, all of which are massive upgrades over the arduino.

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30950
        • Albion

        #4
        Re: Shorty short finder branched and released as ShortyPen!

        rp2040 has no cache and no tolerence for 5v on the inputs,
        esp has hardly any pins.

        i do have several stm32 Blue-Pill's handy though

        Comment

        • itstallion
          New Member
          • Jan 2023
          • 6
          • United States

          #5
          Re: Shorty short finder branched and released as ShortyPen!

          Hi,

          I'm going to build a couple of these shorty pens and I've compiled a list of components available at Digi-Key. This should save someone else some time. Feel free to correct any incorrect components. They have everything except for U2 and U3. I'm getting those from Mouser as soon as they are back in stock. I'll keep updating this thread as needed.

          Thanks
          mark

          Attached Files

          Comment

          • stj
            Great Sage 齊天大聖
            • Dec 2009
            • 30950
            • Albion

            #6
            Re: Shorty short finder branched and released as ShortyPen!

            you should sell spare pcb's to u.s. customers.
            the chinese pcb places will make you 5 or 10 pcb's for a couple of $ and kill you on the postage.
            by selling spare boards you can recover your losses to the fucks at UPS/FEDEX etc.

            Comment

            • clearchris
              Badcaps Veteran
              • Dec 2013
              • 687
              • United States

              #7
              Re: Shorty short finder branched and released as ShortyPen!

              These boards are super small, wouldn't they fall under small-packet postage? It's not quick, but it's pretty cheap. But yeah, cheaper in quantity for sure.

              itstallion: Have you had success soldering stm32 chips? If you have, do you have any tricks? I have not been successful.

              Comment

              • itstallion
                New Member
                • Jan 2023
                • 6
                • United States

                #8
                Re: Shorty short finder branched and released as ShortyPen!

                I'm going to be assembling this thing under a microscope so hopefully it won't be an issue. Hopefully. I may be a masochist as I didn't order the stencil. I've got some experience with Motorola and Arduino. This will be my first time with the stm32. I want to build a reflow oven one day. Anyone have any experience with one of those. Is it worth building one.

                Comment

                • clearchris
                  Badcaps Veteran
                  • Dec 2013
                  • 687
                  • United States

                  #9
                  Re: Shorty short finder branched and released as ShortyPen!

                  Originally posted by itstallion
                  I'm going to be assembling this thing under a microscope so hopefully it won't be an issue. Hopefully. I may be a masochist as I didn't order the stencil. I've got some experience with Motorola and Arduino. This will be my first time with the stm32. I want to build a reflow oven one day. Anyone have any experience with one of those. Is it worth building one.
                  It's not the accuracy that was the issue, I think the issue is overheating / destroying the chip. The chips absorb moisture, and that moisture tends to expand and destroy the chip during heating.

                  I haven't tried reflowing an stm32 in the reflow oven, but I do have a few chips in my dessicant pail. And yes, love my reflow oven, but I rarely do reflow in it.

                  I have a thread on here about my oven, I also put a lot up on hackaday.
                  https://hackaday.io/project/171619-n...-a-reflow-oven

                  The biggest trade off I think is that if you really want to do reflow, you want a small an oven as you can manage, and quartz heaters are definitely better. My oven (found on curb) has resistive heaters, but I added halogen lamps, which is mostly what I use. A built in fan is pretty much a must, as is getting the pans that come with the oven (unless you want to make one out of sheet metal). The bigger the oven, the harder it is to heat to hit those trapezoidal reflow curves, but the more versatile it is because you can put other things in it too.

                  Were I to do it over again, I'd probably gut the resistive heaters, they are just so slow heating, and use 4 halogens instead of the 4 resitive heaters and 2 halogens. I'd also strongly consider buying a meter or two of silicone foam for insulation instead of the ceramic. Doing the hybrid relay / SSR setup was a total win, having the heater individually selectable has been great, 90% of the time, I run the single bottom halogen only. Ramp speed is quite reasonable, and easy to shield sentitive items (filament spools, desiccant, mobile phones, etc) from direct heat. I wish I knew how to speed control the AC fan though. It's currently full blast or off.

                  Using klipper (3d printer firmware) was an amazing success. It works so well, whenever I want the oven to do something new, I just write a new gcode script and upload it to the oven. It works so well, I haven't touched the software after the initial install, it's still running probably 3 year old code at this point.
                  Last edited by clearchris; 01-27-2023, 12:02 PM.

                  Comment

                  • diif
                    Badcaps Legend
                    • Feb 2014
                    • 6978
                    • England

                    #10
                    Re: Shorty short finder branched and released as ShortyPen!

                    I'd put the PCB on a hot plate, then flip it over to hand solder the display and buttons.

                    Comment

                    • itstallion
                      New Member
                      • Jan 2023
                      • 6
                      • United States

                      #11
                      Re: Shorty short finder branched and released as ShortyPen!

                      I think I'll run all the components through a pre heat before soldering them. That should help with the moisture issues.

                      I have some experience with Klipper. Interesting use of Klipper.

                      Comment

                      • clearchris
                        Badcaps Veteran
                        • Dec 2013
                        • 687
                        • United States

                        #12
                        Re: Shorty short finder branched and released as ShortyPen!

                        Originally posted by itstallion
                        I think I'll run all the components through a pre heat before soldering them. That should help with the moisture issues.

                        I have some experience with Klipper. Interesting use of Klipper.
                        If you purchase the stm32 chips from a reputable place, it will come with a moisture indicating paper, and it will tell you if you need to pre-heat (if you follow their processes exactly). I'd probably do it anyway.

                        Yeah, the oven was state of the art a few years ago, but since then, I have heard from others who have made their own KlipperOvens. Yeah, detractors will say that it's a lot of hardware for an oven, you could get by with only an MCU, but IMHO, it's worth it for the feature set, and for how very little I had to code. At that point I had been using klipper for years, I didn't even have to figure out klipper.

                        Comment

                        • stj
                          Great Sage 齊天大聖
                          • Dec 2009
                          • 30950
                          • Albion

                          #13
                          Re: Shorty short finder branched and released as ShortyPen!

                          you wont find st chips easily,
                          even the chinese have had to adapt a lot of designs to use licensed clones


                          btw, has anybody tried make a small reflow oven out of a so-called "air fryer" ??
                          it seems to me that if you have air moving around the heating would be more even.

                          Comment

                          • sam_sam_sam
                            Badcaps Legend
                            • Jul 2011
                            • 6026
                            • USA

                            #14
                            Re: Shorty short finder branched and released as ShortyPen!

                            Originally posted by stj
                            btw, has anybody tried make a small reflow oven out of a so-called "air fryer" ??
                            it seems to me that if you have air moving around the heating would be more even.
                            Now this is an interesting idea I need to try this when my convection oven takes a shit to experiment with this idea

                            The only thing that I might have to do is use a more accurate temperature controller for best results

                            Because the cheaper models use a mechanical thermostat switch to control the temperature

                            The more expensive ones use some type of temperature control that seems to be more accurate controlling the temperature because I have both versions of the convection ovens and you do get different results depending on what food you using it for
                            Last edited by sam_sam_sam; 02-01-2023, 04:25 PM.

                            Comment

                            • stj
                              Great Sage 齊天大聖
                              • Dec 2009
                              • 30950
                              • Albion

                              #15
                              Re: Shorty short finder branched and released as ShortyPen!

                              i assumed you had ripped out the control and fitted a pwm drive anyway.
                              most diy ovens are arduino controlled

                              Comment

                              • clearchris
                                Badcaps Veteran
                                • Dec 2013
                                • 687
                                • United States

                                #16
                                Re: Shorty short finder branched and released as ShortyPen!

                                My convection toaster oven does have a fan in it, the temperature is very stable, can easily hold 1c, and I bet part of that is electrical noise on my ancient max type-k reader chip. I wouldn't bother if the toaster oven doesn't have a fan.

                                From the way I understand air fryers, they move a lot of air out, so I don't know that they could reach the target temperatures quickly enough. However, I haven't really looked into it. If they are all quartz heaters or other heater with fast response it might be possible.

                                I thought stm32 chips were available again? Is there still a shortage? Maybe I have some to trade

                                Comment

                                • clearchris
                                  Badcaps Veteran
                                  • Dec 2013
                                  • 687
                                  • United States

                                  #17
                                  Click image for larger version

Name:	IMG20250418164723_1.jpg
Views:	75
Size:	993.3 KB
ID:	3618234
                                  I ordered them, we'll see how it goes.

                                  Comment

                                  Related Topics

                                  Collapse

                                  • DynaxSC
                                    Extreme High Current & Low Voltage Short Killer ??
                                    by DynaxSC
                                    Hi Folks

                                    I'm looking for a extreme high current short killer solution for a reasonable cost.

                                    I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
                                    After taking off the socket, the shorts dissappear again.
                                    The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...
                                    10-15-2024, 10:13 AM
                                  • Stephen
                                    MacBook Pro 14" A2442 Short on PPBUS_AON but no short present when injecting voltage!
                                    by Stephen
                                    I check PPBUS_AON and there is a short present on the line, the computer shows a short when testing for short to ground, so when I inject voltage into the line, I get 0AMPS so no short is showing up. I have replaced a blown cap on this board that exploded and tested for the short and it is now removed. Any suggestions? I tested voltage at the line when the fuses are connected and I am getting 1.2 Volts at the line.
                                    02-06-2025, 12:03 PM
                                  • Victor Moreira Silva
                                    Acer Nitro 5 LA-L181p power LED turns on by 5 secs (Short on PCH rail?)
                                    by Victor Moreira Silva
                                    Hello everyone,

                                    I'm trying to repair my old Acer Nitro 5 (AN517-54-55T5). I've already bought a new laptop, so this is more of a learning project. For the experience, with no high expectations of success.

                                    Well, my decice specs are the following:

                                    Model: Acer Nitro 5 AN517-54-55T5
                                    CPU: Intel Core i5-11400H
                                    GPU: NVIDIA GeForce GTX 1650
                                    Motherboard: GH51G LA-L181P Rev:1c

                                    The symptom:
                                    When pressing the power button, the power LED lights up for about 5 seconds and then turns off. Initially, the issue was intermittent: sometimes...
                                    05-26-2025, 10:49 AM
                                  • aaronkatrini
                                    Help me find the short circuit on this WORKING Nvidia GTX1650
                                    by aaronkatrini
                                    Hi all,

                                    Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.

                                    Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second...
                                    04-18-2024, 03:15 PM
                                  • Geeker007
                                    9th Gen Dell Optiplex Micro PC motherboard repair: Short Circuit?
                                    by Geeker007
                                    Hi All, I have a 9th Gen Dell Optiplex micro PC motherboard which doesn't power on. When I connect the motherboard with power adapter, it goes into safe mode and turns off. So from info I have gathered online, it looks like there is a short circuit on the motherboard. So can you guys help me with figuring out the issue?

                                    I am new to electronics repair, so my queries could be naive but I am ready to learn.

                                    So I have a multimeter and a solder with me. But I can try to get a variable voltage power supply with a thermal camera as well. From what I seen online, best way is...
                                    01-28-2025, 03:31 PM
                                  • Loading...
                                  • No more items.
                                  Working...