Donors

Drop-in replacement for earlier airwire design of TX with identical funcionality and interface. Airwire building method still fully supported.

• Quicker and easier to build than airwire transmitter
• Easier to mount into the optical head
• The same performance as airwire transmitter
• Soldermask and silkscreen for easy population
• Including mechanical design and complete guide

• Drilling templates that speed up manufacture of mechanics significantly:

• Ronja Holder 5 templates
• Ronja 130mm Tubular Head 8 templates

• Incorporates unique LED driving technique to get as long communication range from the lazy IR diode as possible
• 1.25 km range with commonly available loupe lenses and single transmitter head and 4km visibility (Metropolis/Tetrapolis have 1.4 km).
• Drop-in replacement for Ronja 10M Metropolis Transmitter. Doesn't need any mechanical or electrical changes.
• Greater beam divergence which makes alignment less critical
• No specialized, difficult to get integrated circuits used.
• Complies to 480/2000 Sb. Czech State Regulation for naked eye for all distances
• Does comply to 480/2000 Sb. Czech State Regulation for 20x binoculars for distance 20m and more
• Doesn't comply to 480/2000 Sb. Czech State Regulation for 20x binoculars and observer distance less than 20m when device is mis-focused to near distance.
• Detailed eye safety study with 72 pages (72 graphs) included tailored specially to Czech State Regulation 480/2000 Sb.
• Graphs for determining range included. All combinations from (HSDL4220, HSDL4230, HPWT-BD00-*, HPWT-BH00) LED vs. (60mm, 75mm, 80mm, 90mm, 100mm, 130mm) transmitter lens vs. (60mm, 75mm, 80mm, 90mm, 100mm, 130mm) receiver lens vs. (4km, 2km, 1km, 500m, 200m, 100m, 50m) visibility examined. Graphs are based on real measurements of real lens samples.
• Complete building guide included

More accessories are part of this design because had to be developed as a byproduct:

• Ronja Hertz signal generator. A module of Ronja, suitable for benchmarking dynamic performance of transmitter or transmitter+receiver pair. Complete building guide included.
• Ronja Benchpress: a model of Ronja that is not a communication device, but a bench for measurement of lens+diode combinations. Using Benchpress, lens+diode combinations' gain can be precisely measured and communication range exactly predicted.

  Benchpress consists of Starquake - a measurement signal transmitter - and Audiofire - a measurement signal receiver. Complete guide included.

• Optimized for component obtainability
• Double-sided high-performance RF design with the same range performance as airwire construction
• Soldermask aiding manual soldering
• Service print aiding manual populating with components
• Including mechanical design
• Metal case for excellent RF shielding (against WiFi, mobile phone or BTS interference)