Piotr Esden-Tempski

@esden.net

1206 Followers 135 Following

fediverse: @esden@chaos.social Embedded Open-Source Hacker? Founder of 1BitSquared https://1bitsquared.com | Maintainer https://black-magic.org | https://icebreaker-fpga.org #hardwarehackers #fpga #asic #embedded #risc-v he/him

Sped up video of the no kings 3 march showing the crowd of marchers.
Green Black Magic Probe v3.0 JTAG/SWD debugger and programmer with a built in GDB server. Mounted on top of a carrier board that provides a regular ARM Cortex debug connector and 0.1” pitch breakout pins for the debug lines and the AUX expansion connector. It also features a jumper to allow TPWR connection to the debug connector allowing the choice of how things are powered.
NoKings2 march in Eugene Oregon. Showing the march from a bit above the crowd marching with the people. You can hear a few different chants along the way.
NoKings protesters. Some of the signs: “Due Process for All”, “Willie Nelso for President”, “Dump the Trump”. But the biggest one is carried by a person dressed in blue scrubs. Carries a “Operation Game” styled sign. A cartoon Donald trump is on the operating table and has a bunch of annotations. “Bird Brained Idiot”, “Forked Tongue Liar”, “Mean Hearted Bully”, “Taco Tits”, “Small D—K Energy”, “delusional Dictator”, “Cankles Crime King” he is holding also a crown in his hand.
Caricature of a crazed Stephen Miller, holding a “naked cat”/“little baby” Donald Trump with empty eyes on his lap. Miller is pressing his vampire claws into Trumps back. On Stephen’s arm is a red armband with a part of a circle suggesting a “certain party” affiliation. The picture has a subtext “Peewee German’s Pet” which is a play on words with “Peewee Hermann” who was a US American comedy character known for being small and childlike. In the right lower corner is the date October 18th, 2025, the day of the second No Kings protest.
Merge pull request dropdown: * Create merge commit * Rebase then fast-forward * Rebase then create merge commit * Create squash commit * Fast-forward only
Command line output of bmputil when invoked with no parameters. -> bmputil-cli Black Magic Probe companion utility v1.0.0 Usage: bmputil-cli [OPTIONS] <COMMAND> Commands: probe Actions to be performed against a probe target Actions to be performed against a target connected to a probe server Actions that run the tool as a debug/tracing server debug Actions that run debugging commands against a target connected to a probe complete Generate completions data for the shell help Print this message or the help of the given subcommand(s) Options: -s, --serial <SERIAL_NUMBER> Use the device with the given serial number --index <INDEX> Use the nth found device (may be unstable!) -p, --port <PORT> Use the device on the given USB port -h, --help Print help -V, --version Print version
Screenshot of a terminal. Showing the output of `bmputil-cli`. ``` Black Magic Probe companion utility Usage: bmputil-cli [OPTIONS] <COMMAND> Commands: probe Actions to be performed against a probe target Actions to be performed against a target connected to a probe server Actions that run the tool as a debug/tracing server debug Actions that run debugging commands against a target connected to a probe complete Generate completions data for the shell help Print this message or the help of the given subcommand(s) Options: -s, --serial <SERIAL_NUMBER> Use the device with the given serial number --index <INDEX> Use the nth found device (may be unstable!) -p, --port <PORT> Use the device on the given USB port -h, --help Print help -V, --version Print version ```
A large train of people marching with hand made signs.
No makings protest at the federal court building in Eugene Oregon. Huge crowd with signs bearing an overpass.
DigiKey invoice detailing Tariff codes, Country Of Origin and the Tariff amount paid on each item.
DigiKey Cart, containing the same items as the Mouser one. The estimated tariffs are about 10% lower than Mouser.
Mouser order cart listing several STMicroelectronics parts. Each part has an extra line labeled "Estimated Tariff:" adding about 25% to the price of every item on the list.
Two sets of sub-unit STM32 symbols. One set for STM32G0B1C(B-C-E)Tx and the second set for STM32L452V(C-E)Tx.
Black Magic Probe assembly on Hanwha SM482Plus pick and place machine.
Assembling iCEBreaker DVI Pmods on the Hanwha SM482Plus
Assembling iCEBreaker DVI Pmods on the Hanwha SM482Plus
Hanwha SM482Plus assembling iCEBreaker V1.1a PCBs
OpenSource iPod inspired music player called Tangara. It shows some genres on the display and is sitting on top of some open back headphones.
A blue background with a printed carton saying “taagara”, an outline drawing of an iPod looking device, (square screen and a round click wheel on the bottom), CE and FCC markings as well as a QR code redirecting to the https://cooltech.zone/tangara/ website. To the right the #tangara itself with a pretty frosted transparent enclosure.
The Epic-Erebus board in the breakout board socket. The Breakout board is missing all the through hole parts but the card is fitting and lines up with the m3 screw stud correctly.
The mcHF RF board. The Toroid inductors have a big blob of hot glue melted into the center hole. The glue goes all the way down to the PCB keeping them in place. On the right the SWR/Power meter inductors have also a small dab of hot glue on the side. In the background the transformers also have some hot glue to keep them in place.
The mcHF RF board with an SO-8 Temperature sensor soldered on. There is a copper tape shape bridging across from the SO-8 To the square oscillator package.
On the left is a SWR/Power meter by SureCom model SW-102HF. On the right is a 50W dummy load held in the hand for size reference.
A picture of a roof from the side. Showing vents along the roof crest as well as a wire going to a bipod in the center and continuing to the other side of the roof. There is also a VHF antenna in the left upper corner of the picture.
Screenshot of the GridTracker software showing FT8 communication log. Some blue and green squares in the us as well as China and Japan!
The mcHF-QRP radio showing a nice rainbow waterfall and receiving some SSB on the 40m band. Ragchew receive achievement unlocked! :D
The mcHF QRP radio fully assembled in it’s enclosure.
The front of the mcHF enclosure in the background. In the foreground there are scissors holding two silicone buttons in a strip.
The video shows the mcHF UI PCB mounted on top of the other parts inside the case. A hand comes from the left side into the frame and removes protective film from the LCD display, with a satisfying sound. :)
The mcHF radio enclosure with the RF board installed. On top of the RF board is a piece of sheet metal with multiple cutouts for components. This is the RF shield to decrease the amount of interference from the UI board coupled into the RF board.
Speaker screwed into the back half of the mcHF radio enclosure. The speaker has a red and black lead with a connector soldered to it.
The mcHF UI board with the R8 resistor soldered in. This provides phantom power to the electret microphone of the handset.
The two Power Amplifier (PA) MOSFETs in TO-220 packages. There are screw nuts on the thermal pads that have a dab of solder in the corner keeping them in place. The components are already soldered into the RF PCB.
The mcHF RF board. Three white boxes which are the micro relays as well as a glass bulb with two electrodes inside. The bulb is a neon bulb connected to the antenna.
The mcHF RF board with a bunch of magnetics and the BNC connector mounted. The newly added items are two square cross section toroids with 10 enameled wire windings each. The toroids also have one winding of a coaxial cable each. The coax provides “Faraday shielding” to provide adequate reverse isolation for the transformer. I am pretty sure the bend radius on those coax wires is "illegal" and that the board was not originally designed with this topology in mind. I am pretty sure there are better ways to lay it out so that it is not so painful to install... :D
The mcHF RF pub with 12 toroidal inductors. The winding count varies from left to right. On the left the inductors have less windings than on the right. The left most set of three inductors are for the roughly 10m bands, then 20m and 30m. The last two columns are 40m and 80m bands.
The green mcHF RF PCB. In the center there are three red ferrite toroids with copper enameled wire wound around them. From left to right they have 24, 27 and 24 windings each.
The mcHF power amplifier section schematic as viewed in KiCanvas.
The mcHF RF board with three hand wound devices using multi aperture ferrite cores. (each core looks like a binocular) From left to right. Power input choke, 2T bifilar transformer and TX 2T/3T transformer.
An SMD part soldered onto a green PCB. The SMD component has a ferrite ring stuck to its top. Multiple enameled wires in red and green color are wound through the ferrite ring and the wires are soldered to the legs of the SMD component. The SMD component also has lips at the end of the part to keep the ferrite ring in position.
The mcHF board with the BNC, KEY, ACC, Power plugs soldered on. In the top middle of the board a small balun is also visible. The left lower corner is missing an SO-8 package that is meant for the temperature sensor.
First power up of the mcHF UI board. The firmware that the kit came with is quite old. V2.5.106 and the bootloader says “Unknown”. But NO SMOKE so that is great news so far!
A sandwich of screen, interposer connector and the UI PCB. At the end it is quite wasteful because it uses an off the shelf breakout providing the 2mm pitch connector strips but it costs a lot of height making removability of the LCD module a challenge.
Two LED soldered into the UI board. They are elevated above the board without dedicated standoffs. In production one would use plastic standoff sleeves to make the distance consistent. Doing it this way is too finicky otherwise.
mcHF case shifted to the right, over the UI board. Holding a through hole LED with tweezers sitting against the edge of the case to gauge the distance to the PCB.
mcHF radio UI board with the encoders and tact switches soldered on.
The mcHF UI board with the inter board connector mounted. It is the pin header which is not how the original kit is designed but it is better because the RF board is providing power, and it is better to have sockets on the power side and pin headers on the side that receives power.
Green PCB with multiple 3.5mm audio jacks mounted. The R8 resistor position is pointed out by an arrow on the board.
Two green PCB with protective foam around the electrolytic capacitors. The top board is the User Interface (UI) board and the bottom one is the RF board that will be doing all the magical radio squiggly stuff. :D
Two green PCB. Lower one is the user interface and the upper one is the RF board. In the right upper corner are little baggies full of parts. In the left upper corner is the enclosure. In the left lower corner is the display for the radio.
Olympus OM-1 SLR camera with a 50mm lens. A 28mm lens in the right lower corner. Two films from Kodak on the left. One color one B&W.
Yours truly in a blue suite in front of the US and Oregon State flags holding a tiny US flag.
iCEBreaker V1.1a FPGA development and teaching board centered around the Lattice iCE40 FPGA. A Blue PCB with white silkscreen on a blue antistatic mat. Has white buttons on it, some of the LED are lit. A green power led, two green and one red led on the pre attached pmod, blue led indicating that the bitstream was loaded as well as red and blue LED inside the RGB LED package.
Six Brown boxes with white labels on them. The boxes contain 50 Glasgows each, adding up to 300 units.