The new and improved backpack PCB arrived. Better late than never I guess. I started by soldering on some headers.I soldered a couple of female straight headers to hold the ESP-32, a couple of male pins to connect to the +5V and GND on the ESP, and a...
I had already designed an alternate frame to support the CHESSmate should one not want to go the the extra work of printing the reproduction's case. Problem is I didn't like it and it wasn't growing on me. Too rushed, too clunky. So I took another run...
If you are reading this, you are probably somewhat familiar with programming and maybe curious about adding a small display to your project. As I continue down the learning path, I have found that adding a small display to my projects is not just beneficial...
Thomas Shaddack 3:53 PM Could polaroid-class instant camera film work for xrays (or autoradiography)? bruniss 3:54 PM diagnosis: crack Ahron Wayne 3:54 PM Lol. Hey Bruniss Dan Maloney 3:54 PM They actually use both Ilford 4x5 film and Instax instant...
Dan Maloney 3:00 PM OK, let's get things going. I'm Dan, I'll be moderating today along with Dusan as we welcome Ahron Wayne to the Hack Chat. Ahron has done some cool work with X-rays and CT to visualize ink on carbonized papyrus scrolls for the Vesuvius...
The 5.21E ROM works file with the current board, but the 7.11A ROM uses a different pin for the vertical sync signal. This can be fixed, but then the 5.21E ROM results in no display. Rather than fixing the hardware (with a jumper to be changed when the...
Now given that Sensepeeks sells spare isolation rings and sliding covers for a reasonable price (a roll of low friction teflon, ptfe or hmwd tape is not exactly cheap) -- we'll try to keep the design such that these are still usable should we want to.And...
The following statements are supported: PRINT LET = IF GOTO GOSUB RETURNINPUT FOR = TO [STEP ]NEXTEND and additionally, these commands can be issued if not prefixed by a line number: LISTRUNNEW is a letter A-Z. A single array called @ is supported, its...
I can't think of any organized way to walk through what I did to get to the point I am right now, so I'm just going to put the YAML here and let the comments speak for themselves. I wish the syntax highlighting was nicer, but there it is.Based on the...
To solder the boards there were few SMT (surface mount) components (mainly diodes and resistors) and some THT (through hole). For SMT usually you will have a stencil, pick and place machine, reflow oven to do all of that automatically but in my...
Two GAGG(Ce) and three LYSO scintillator crystals next to a TO-92 transistor for size comparisonPhysics overview When a high energy photon (a gamma ray) is absorbed by a scintillator some visible photons are emitted. These visible photons have a fairly...
Physics overview To convert the small number of optical photons into an electric signal a photodiode is not ideal. Short of using a photomultiplier tube (PMT) the best option is a silicon photomultiplier (SiPM). These are arrays of thousands of cells,...
This is my collected data from Aliexpress inductors I have in my parts bin. The link displays the oscilloscope screen shot for that inductor test. The worst inductors where the SMD 1210 sized inductors, which probably were not meant for switching power...
I have an old 3D printer, an UP3D mini to be specific. It has a build volume of just 10cm x 10cm x 10cm. That's pretty small by modern standards.Additionally, the bed-heater is fixed at 60 degrees centigrade and in it's original factory state, it only...
A prototype design for the probe was created that will clip loosely around the effector platform. Springs will force the probe assembly downward into the bed as the platform is lowered. A 15mm x 15mm copper plate will be used as a capacitive...