| Minimal requirements OptoArma (Fig. 2) | Minimal requirements OptoArm with low-cost standa,b (Fig. 2) | Automated OptoArm with low-cost standa (Fig. 10) | Additional improvements or available changesa, d |
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Electronics | • Royal-Blue (448 nm) Rebel LED • 700 mA externally dimmable BuckPuck DC driver • Connecting wire with adjustable potentiometer of 5 kΩ • Latching pressure switch (ON/OFF switch) • DC contra plug • 9VDC – Adapter | All the previously mentioned components | All the previously mentioned components Except: • Connecting wire with adjustable potentiometer of 5 kΩ Plus: • Arduino Uno (or clone) • Capacitor (0.1 μf) • Adafruit LCD shield | Yellow LED for NpHR/Halo/Mace: e.g., Lime (567 nm) Rebel LED on a SinkPAD-II 20 mm Star Base - 368 lm @ 700 mA COST: $11 Tri-star LED for higher intensitye: Royal-Blue (448 nm) Rebel LED on a SinkPAD-II 20 mm Tri-Star Base - 3090 mW @ 700 mA. COSTS: $14 |
Heat management | • Heatsink 5.2 °C/W • Pre-cut thermal adhesive tape | All the previously mentioned components | All the previously mentioned components | – |
Optics | • Khatod 10° lens • Fraen 21° lens • Khatod 40° lens | All the previously mentioned components | All the previously mentioned components | – |
Mounting | • Lens holder • Three-pronged clamp | All the previously mentioned components AND: o Stand rod o Double bosshead o Retort stand base, tripod | All the previously mentioned components | Comar fine-tuner standf: Basic carrier, pinion stage, post-holder, rod, self-manufactured base. COSTS: ~ $ 280 Cross-clamp to fixate DC plug on armg: COSTS: ~ $12 |
Average costs | ~ $ 65 | ~ $ 90 | ~ $ 128c (Arduino clone: $ 116) | Â |