Alternative 2 to ORWO C 9165 – UT-18 in ECN-2 negative process
This article is about the development of ORWO UT-18 in the negative process as an alternative to ORWO C-9165.
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LTC3784 – 1200W Polyphase Boost Converter
Mit einem Eingangsspannungsbereich von 10-50V stehen ausgangsseitig 1200W bei 50V zur Verfügung wobei die maximal mögliche Dauerleistung von der Eingangsspannung sowie thermischen Anbindung limitiert wird. Der Wirkungsgrad bei 11V Eingangsspannung und 750W Ausgangslast ist besser 95%. Bei Abruf von 1200W...
TPA3255 / TPA3251 / TPA3245 universal - one for all
On the basis of experience and measurements with TPA3251 boards from TPA3251D2 - 2 x 175W stereo 350W Mono class-D amplifier rises the "TPA3245/51/55 - universal" Board for up to 600W (PBTL Mono).
TPA3251D2 - 2 x 175W stereo 350W Mono class-D amplifier
In analogy to the TAS family (TAS5630B, TAS5613A, TAS5611A), Texas instruments introduced a new class-d chip amplifier, the TPA3251D2 (HTSSOP44). Specs are: differential analog inputs 2Vrms 90% efficiency (4 ohm) 12-36V power supply 2 x 175W at 4 Ohms BTL (10% THD) 2 x 220W...
Alternative to Orwo C 9165-UT-18 in C-41, RA-4 or ECN-2
This article is about the development of ORWO reversal films, here the UT-18, in currently available photo chemistry as an alternative to ORWO C-9165, which is based on CD-1. Chemical basis of dye formation in ORWO processes (e.g. C-9165) The essential difference between the...
Revive the inheritance: Facts on the development of Kodak Eastman ECN-1 Film 5251 50T
Today we are devoting ourselves to research and understanding analog film processes. A particularly fascinating project is the development of the Kodak 5251 50t Eastman Color Negative Film - a historical film from the 1960s, which originally for the now outdated ...
ORWO Negative Film NP 3
The NP 3 is a very fine-grain recording material of medium sensitivity for outdoor recordings. The remarkable sharpness of contours and the high resolving power offer favorable conditions, e.g. for rear projection recordings. A short drying time is guaranteed by high hardening. To increase the antihalation protection, the...
ORWO Negative Film NP 5
As a standard material for indoor and outdoor recordings at high sensitivity, the NP 5 is characterized by outstanding image sharpness and low graininess. Thanks to these properties, it particularly meets the requirements that large-scale projection (wide screen, total vision, etc.) places on the recording material...
ORWO Negative Film NP 7
Highest sensitivity. For current film reports, especially for artificial light in the theater, at meetings, etc., but also for daylight under unfavorable lighting conditions. The base is colored grey. Format 70 mm, 35 mm and 16 mm code no. 84— at 70mm, 35...
ORWO Color Positiv-Film PC 9
PC 9 is a multilayer film consisting of three emulsion layers selectively sensitive to green, red and blue light. The two upper emulsion layers are stained with screen dyes to avoid diffusion halos. On the back of the film is a green antihalation layer...
ORWO Color Positiv-Film PC 7
PC 7 is a multilayer film consisting of three emulsion layers selectively sensitive to blue, green and red light. A yellow filter dye is embedded in the top layer to shield blue rays from the middle and bottom layers. On...
ORWO Color Negative Film NC 1
The ORWOCOLOR negative film NC 1 is a standard material that can be used for artificial and daylight photographs. In artificial light, one works without a filter and for photographs taken in daylight, the ORWO filter K 14 is used to adapt the material to the higher color temperature. The NC...
48V 3A 54.6V E-Bike Battery Charger B32891 TCDZ0001-2016
For little money you can buy a 48V 3A e-bike battery charger via the usual channels, which can neither shine with performance nor inner values. A purchase is not recommended.
ORP / Redox / PH electrometer Shield for Wemos D1 Mini with LMP7721 ADS1115 ADM3260
Presented is a shield, compatible with the Mini Wemos D1, alternatively generically I2C any on each controller. Implemented is an electrometer amplifier for measuring pH / redox / ORP potential based on the TI LMP7721.
