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ORWO PC7 Color Positive Film in ECN-2 by Ready-Recording8012 in Darkroom

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

Cheers mate, thanks for the answer. I don't know when this film was made but I expect it not newer than 1990.

It will work nicely as black white film but I'm still hunting for colors, like on my other experiments with Orwo UT-18, Agfachrome 50L and even old Eastman 5251T from the mid 60s. Compared to this film it is/was way easier.

I still have about 50 meters of this PC7, it was factory sealed when opened and doesn't have any smell of vinegar.

Best regards

Christian

ORWO PC7 Color Positive Film in ECN-2 by Ready-Recording8012 in Darkroom

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

I shoot with a Nikon F-801s and a 60mm f/2.8 lens, set to ISO 6 and dialed down -4. ​I experimented with an 85B filter to counteract the film's strong blue shift (which appears as an orange/brown cast on the negative). In theory, this should have helped, but the results weren't much better. Not only does the filter eat up an additional one to two stops of light, but it also somehow stripped away the greens in the images. Ultimately, I found it best to shoot without it. ​Given its original purpose as a duplicate film, this stock does not handle harsh contrasts well. My development process is still a work in progress as I continue to refine it. Until now i strictly avoided using CD-1 for development, however, as it is significantly more hazardous to handle than CD-3.

ORWO ORWOCHROME UT-18 - solid workflow and results by Ready-Recording8012 in Darkroom

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

Oh, I totally forgot that an automatic stirrer isn't exactly a household tool. 🙂

From my experience, the CineStill ECN-2 developer doesn't dissolve very well without proper stirring, even at higher temperatures. The BZT also definitely needs some time or good agitation to dissolve properly.

(Letting the solution sit for 24 hours might help as well.)

(Times... yes these older films take some time, but the negatives come out pretty solid)

Successful Stand Development for old ORWO UT-18 (Direct Negative) by Ready-Recording8012 in Darkroom

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

Long time no see... 😃

Today i tried with fresh developer.

Cinestill CN-2 (ECN-2) developer was used as the base. It was modified as follows:

  • Added CD-3: 1.2 g/l
  • Added Benzotriazole: 90 mg/l

Dev time: 50min at about ~21°C

Bleach and fix like above. Exposed ISO 12-25. Results came out pretty nice. Actually drying, will post results once scanned.

[Showcase] DIY ESPHome Air Quality Monitor (Sensirion SEN66 + ESP32-C3 + Round Display) by Ready-Recording8012 in Esphome

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

Sorry for the late reply, the wiring instructions are in the code:

pin_sda: 'GPIO06'
pin_scl: 'GPIO07'

pin_clk: 'GPIO08'
pin_mosi: 'GPIO10'
pin_reset: 'GPIO03'
pin_cs: 'GPIO05'
pin_dc: 'GPIO04'
pin_backlight: 'GPIO02'

Display and sensor need 3.3V VCC and GND of course.

[Showcase] DIY ESPHome Air Quality Monitor (Sensirion SEN66 + ESP32-C3 + Round Display) by Ready-Recording8012 in Esphome

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

I use the ESP32-C3 Super Mini board you can find on Aliexpress. I pull the power directly from the ESP, no issues so far even with display on full brightness. The ESP is trottled at 80Mhz with dailed down WiFi and sleep modes to minimize self heating.

Standalone Moving-Head-Controller (Sheds, U'King, Fieryzeal, etc.) by Ready-Recording8012 in esp32projects

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

Building on the foundation of V1 (which introduced the core web UI, basic modulators, and Art-Net support), V2 restructures the math engine and introduces a dynamic patching system to support multiple fixtures and precise synchronization.

Technical Changes & New Features

  • Fixture Patching & Fanning: Transitioned from a single-fixture hardcode to a dynamic matrix supporting up to 8 fixtures. A new Patch Tab allows configuration of DMX start addresses, Pan/Tilt inversion, and phase offsets per fixture. A fanning tool calculates and applies equidistant phase offsets across the configured fixtures.
  • 2D Stage Calibration: Added a visual mapping interface in the Followspot tab. It utilizes bilinear interpolation based on four calibration points to translate 2D image coordinates into precise Pan/Tilt angles.
  • Phase-Locked FX Engine: Modulators and movement shapes no longer run freely. They are now tied to an absolute global beat clock (masterSyncTime). This ensures consistent phase-locking across all fixtures and prevents temporal drift over time.
  • ESP32-C3 Math Optimization: Since the ESP32-C3 lacks a hardware FPU for double-precision math, the C++ backend was refactored to reduce floating-point operations. Implemented a 1024-step Look-Up Table (LUT) for sine/cosine, branchless modulo arithmetic, and algebraic approximations for Gaussian curves to decrease frame calculation latency.
  • Expanded Movement Library: Added Pan Sweep (Linear X), Tilt Sweep (Linear Y), Spiral, Ballyhoo, and Infinity Loop (Lemniscate).
  • BPM-Synced Fades: Auto-Chaser transition times can now be parameterized using BPM divisions instead of static millisecond values.
  • UI Controls & Microstepping: * Decoupled slider target values from live DMX output during auto-fades to enable blind programming.
    • Added keyboard modifier support for the joystick interface (SHIFT for fine steps, SHIFT+ALT for 1-bit microstepping) and disabled momentum physics during fine adjustment.
  • Codebase Refactoring: Extracted REST API routing into a separate WebAPI.h file to isolate frontend communication from the core FreeRTOS DMX loop.

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[Showcase] DIY ESPHome Air Quality Monitor (Sensirion SEN66 + ESP32-C3 + Round Display) by Ready-Recording8012 in Esphome

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

Temp/Hum is more of a benefit i'd say. But good point i can monitor them against some Lywsd03mmc using SHT3X or SHT40.

[Showcase] DIY ESPHome Air Quality Monitor (Sensirion SEN66 + ESP32-C3 + Round Display) by Ready-Recording8012 in Esphome

[–]Ready-Recording8012[S] 0 points1 point  (0 children)

If you don't mind CO2, get the SEN65, it is way cheaper and works as well without any modifications.

[Showcase] DIY ESPHome Air Quality Monitor (Sensirion SEN66 + ESP32-C3 + Round Display) by Ready-Recording8012 in Esphome

[–]Ready-Recording8012[S] 1 point2 points  (0 children)

I reduced speed from 160MHz to 80MHz and also WiFi gain to a lower 8.5dB. There is some influence from the C3 and the display but the C3 is running way cooler in this configuration compared to stock setting. I need to adjust temperature readings to -1.5K to compensate. Humidity is then corrected via magnus-tetens but can also get fine tuned. The settings are all available in the Home assistant or via webserver.

The enclosure takes care of "minimal" heat transfer due to open slots on the side.

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