25839 Results for "『 모든문의 OIO=5793=7458 』 선릉셔츠룸㈄『 모든문의 OIO=5793=7458 』 Ηcake²셔츠룸테란강남셔츠룸デwriter 셔츠룸테란강남셔츠룸 선릉셔츠룸⒁셔츠룸사이즈┲exhausted⅔"

Proof-of-concept experiment
Log from Claymore - SLS 3D printer using polymer clay
In the beginning of this year (Jan. 26), before building anything, I did a small experiment to confirm the most important idea of this project: hardening polymer clay with laser. Methods The materials are: Polymer clay: Fimo Soft (black)Laser: VoidMicro...

Flashback : Prework
Log from TI-57 Programmable Calculator Hardware Retrofit
The more I read about the TI-57, the more I wanted to fix mine. Of course, these are easily found on a-large-well-known-online-auction-site for modest prices - typically $40 or less. Like most hobby projects, my goals were entirely devoid of practicality. ...

Blue Pill Emulation
Log from TI-57 Programmable Calculator Hardware Retrofit
Another key part of ensuring that replacing the TI-57's TMC1500 "brain" is possible is to ensure that the MCU has enough throughput to emulate it. My initial assumption was that a 64MHz 32-bit ARM MCU should be more than up to the task of emulating a...

Driving the Display
Log from TI-57 Programmable Calculator Hardware Retrofit
The TI-57 has a multiplexed 12-digit common cathode LED display. The corresponding 8 segments of all 12 digits are connected together; sort of. It turns out that TI economized on IC package pins by ”doubling up” the decimal point segment...

Power Supply and Lid
Log from TI-57 Programmable Calculator Hardware Retrofit
Rcl57mcu wants a 3.5-5V supply. So, even if I could resurrect the dead BP-7 NiCd pack/lid, it won’t work for this upgrade. I will instead recycle the tried-and-true USB charged 3.7V LiPo supply that I’ve used for HP Classic, HP-28S, and TI-58/59 supply...

PSU #010, a PL320QMD
Log from Thurlby Thandar PSU repair
Fault label: "Numbers keep changing".2024-03-01Switched on, set dials to maximum. Leftt around 28.8V and drifiting, right around 32.88Dials set to minimum.Left side very slowly descends to 14.3 volts, terminals are at -0.424 volts.Right side slowly descends...

PSU #095, a CPX400SP
Log from Thurlby Thandar PSU repair
This is a switch-mode PSU, so the mains is rectified to around 400 volts DC inside. Extra care is required to avoid touching this dangerous part of the PCB. This can be remote controlled by GPIB, RS232, USB or Ethernet. The user manual is here: CPX400S+SA+SP_Instruction_Manual-Iss9.pdf...

Black on Black or White on Black
Log from Pocket Pad
The display driver includes a command to invert the display and I have included a facility to choose an inverted display in the Settings app. I am still undecided as to which setting is more readable, however after implementing the analog clock app shown...

First quick test
Log from IR UART
Right after the assembly, a basic test confirms the modules work, though the pulse generator frequency is somewhat off. Replacing a 6.8 kΩ resistor with a 4.7 kΩ should fix this. When one module is fed with the 1 kHz signal (from the oscilloscope reference...

Day 1: Arriving (late), Selecting a Concept, and Forming the SuperDuo!
Log from Cultural Integrity (at the Dethrone Hackathon)
Everyone respected my hacker alias and called me 'crip' when I arrived...even got a nametag: "Crip Lishus" - hellyeah! (Given names are so boring and prescribed. It's nice to reinvent ourselves and our identity to match what we like and...

Day 1 (Part 2): Night Owl
Log from Cultural Integrity (at the Dethrone Hackathon)
Now that we were getting out of the concept realm and into the real world tangible stuff, my anxieties began to relieve a bit. It was time to take some measurements ! I rolled over to the nearest bus stop, and took out my midnight measuring tape...

Day 2 (part 1) - Fabric, Access, Workshop and LEDs!
Log from Cultural Integrity (at the Dethrone Hackathon)
The big hacker day was upon us and the gears were in motion! Julia jumped into action during morning solo hacker time. She went to the Mission Fabric Outlet store to find our throne-worthy textiles, as well as coordinating with a participant...

Day 2 (part 2) Rap Music & "Shopping"
Log from Cultural Integrity (at the Dethrone Hackathon)
Julia and I rushed over to TAP plastics, hoping to get our acrylic sheet before closing. On the car ride over, I opened my CD case and asked Julia, "is there any music thatyou'd like to hear?" "You just have old people music, right?'" she said. She wasn't...

Day 2 (part 3): Spray Cans, Ultrasonics, and Mischief
Log from Cultural Integrity (at the Dethrone Hackathon)
Once we got back to my apartment, the fatigue began to set in. It had been a long day already, with nonstop running around. I asked Julia if she could wait for a few minutes while I rested. She was totally understanding and didn't give me...

Serial port
Log from TTi 1705 True RMS multimeter teardown
The serial port pin-out is cunning designed so that you can connect to a PC with a simple modem cable, or daisy-chained with other TTi devices. 1 Power to optional PC-02 2 TXD Transmitted data from instrument to PC 3 RXD Received data to instrument from...

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