My friend sent me this, which I thought was cool:
Circuitry
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Category Archives: Electronics
Force reboot on iPhone
Two methods to reboot an iPhone, from my friend CK:
- hold down volume-up + power for 10 seconds
- volume up button, 1 second later: volume down button, 1 second later hold power button
AliExpress diodes
I ordered a bunch of SMD diodes from AliExpress (nine different types), and nine packages arrived, but they weren’t labeled. I tested everything to infer what I got, and they didn’t ship me what I ordered. My notes are here and the video of me doing all this is here.
I kept a note of the seller and will try to not order from them again. In the mean time I think I have filed the components that did arrive in the correct drawer.
Below are two happy snaps from this project. I guess on the bright side I got some practice doing SMD soldering and using my signal generator and my scope.
Oh, and I added a new item to my debugging notes, viz “is it plugged into the right socket?” (I had my output cable on the signal generator plugged into the wrong BNC connector on the device, that took some figuring out…)
Switching diodes and rectifying diodes
I had an envelope full of SMD diodes arrive today. Three different types in three different sizes, so nine bundles. Unlabeled!
I’m not sure what they were thinking at the shop. I got them from here.
I managed to figure out that the ones marked ‘S4’ were the Schottky diodes (1N5819WS). I think the ones labeled ‘T4’ are the switching diodes (1N4148WS) and the ones labeled ‘T7’ and ‘A7’ are the rectifying diodes (1N4007), but I’m not sure of that yet.
I asked ChatGPT for help and it explained how I can devise a test circuit, so that’s on my TODO list for tomorrow.
cathode ray dude dot com
This guy, Cathode Ray Dude [CRD], does some fun stuff. He’s on the web via HTTPS at gekk.info and HTTP at www.cathoderaydude.com.
Life time supply of zip ties
I think I have roughly 500 zip ties in my drawer. Should take me a while to get through those! I have other ones, but these 150mm ones are my fav.
In The Lab With Jay Jay – September 7, 2023 – Unboxing AliExpress TE-801 Third Hand With Magnifier
This post is part of my video blog: In The Lab With Jay Jay.
In this video I unbox two “different” helping hands (AKA “third hand”) only to discover they are the same TE-801 model.
I purchased these separately on AliExpress:
- 3 Hand Soldering Iron Stand Welding Tool With Magnifying Glass Illuminated LED Alligator Clip Holder Clamp Helping Repair
- Desktop Soldering Holder Welding Equipment Auxiliary Tool Third Hand Helping Repair Tool Magnifier LED Lighting Soldering Stand
They are exactly the same product so if you’re planning to purchase might as well get the cheapest option. Note that the first link above also has a separate more expensive option which is actually a different product, I didn’t get one of those.
In addition to unboxing these third hands I also add some 4mm heat shrink to the alligator clips to take the bite out of the teeth.
Note: in this video I have the annoying habit of calling “heat shrink”, “shrink wrap”. The correct term is heat shrink, shrink wrap is a different type of thing.
In the video I use 4mm yellow heat shrink:
The hot air gun I use is a part of my Horusdy Soldering Station.
The batteries I use are Duracell AAA batteries.
My gloves are:
- 24Pieces/12 Pairs Work Gloves For PU Palm Coating Safety Protective Glove Nitrile Professional Safety Suppliers Color: PU1350NV -DMF; Size: S
UV light
Got myself a USB powered UV light. It came with a few tubes of solder mask:
I’m gonna keep this in my booth where it will be used. Don’t want to use it anywhere near where I keep my UV solder mask because I don’t want to accidentally cure it!
In The Lab With Jay Jay – September 6, 2023 – Enameled Bodge Wire With UV Solder Mask
This post is part of my video blog: In The Lab With Jay Jay.
In this video I solder three different sized bodge wires onto some perfboard for practice and for the purpose of exposition. After attaching the three bodge wires I cover them with UV solder mask.
If you haven’t heard of the expression “bodge wire” before, ChatGPT will explain.
I want to thank my mate Bruce from Branchus Creations for recommending the enameled wire of various sizes, the Swann Morton blades, and the Amtech flux.
I got three rolls of this enameled copper wire from AliExpress:
The diameters of the various rolls I got were:
| Size | mm | inches |
|---|---|---|
| Small | 0.07mm | 0.003″ |
| Medium | 0.16mm | 0.006″ |
| Large | 0.31mm | 0.012″ |
I got the “coppery” colour, not the red stuff.
The Swann Morton blade handles I got were these:
I got three types of blades in #15C, #15, and #10 sizes:
- Swann Morton Surgical Scalpel Blades Sterile Carbon Steel Available In 7 Size #15C 20Pcs
- Swann Morton Surgical Scalpel Blades Sterile Carbon Steel Available In 7 Size #15 20Pcs
- Swann Morton Surgical Scalpel Blades Sterile Carbon Steel Available In 7 Size #10 20Pcs
The #15C Swann Morton blade is the smallest and is so far my favourite. The #15C is the blade I use in this video.
My flux is:
The industrial/precision tweezers I mention in the video are these:
- Hakko CHP 3C-SA Stainless Steel Non-Magnetic Precision Tweezers with Very Fine Point Tips for Microelectronics Applications, 4-1/4″ Length (5 Pack)
- TOWOT Industrial Tweezers (SA11-15) (I got the five pack)
The solder lugs I refer to are these:
The perfboard I used in this video was a 2x8cm board which I picked up from AliExpress:
I use two microscopes in this video:
- Tomlov: TOMLOV DM602 Pro
- Yizhan: Yizhan 48MP Microscope
In the video I reference my thermal imager:
My gloves are:
- 24Pieces/12 Pairs Work Gloves For PU Palm Coating Safety Protective Glove Nitrile Professional Safety Suppliers Color: PU1350NV -DMF; Size: S
My head-mounted magnifying glasses are:
The soldering iron I use in this video is a part of my Horusdy soldering station:
My desoldering pump came in this kit:
The solder mask I ordered was this green stuff, but the stuff they actually sent me was red:
The solder I use in this video is:
My paint brush is the 5/0 sized brush from this set:
The blow torch I mention in this video is this one:
My Kapton tape and tape dispenser are these:
- Kapton Tape 5/8/10/15/20mm 100ft BGA High Temperature Heat Resistant Polyimide Gold Adhesive Tape For Electronic Industry 33m (various sizes)
- Green Multi-Roll Heat Tape Dispenser Sublimation 1″ and 3″Core Double Reel Cores Sublimation for Heat Transfer Tape, Semi-Automatic Tape Dispenser with Compartment Slots
The bench multimeter I use in the video is a:
- OWON XDM1041 Bench Multimeter
The isopropyl (IPA) alcohol I use in this video is this stuff:
Testing CMOS cell battery
I was watching Computers running very slow, long boot time, unresponsive in windows. Let’s fix it. and Richard said that if your CMOS battery reads less than 3V then you should replace it.