Wednesday, March 4, 2015

Circuit Diagram Dew Heater Controller For Telescope using 555 IC

Robotronicdiagram. - Here is again Circuit Diagram Dew Heater Controller For Telescope using 555 IC like in figure 1 below. Dew (condensed moisture) is one of the astronomer’s worst enemies, and all telescopes are subject to the dew problem. If no precautions are taken, it can easily destroy a perfect observing night, as it forms on mirrors and lenses, thus it is required for almost every amateur astronomer to have some kind of dew control system for his equipment.

Circuit Diagram

Figure 1. Circuit Diagram Dew Heater Controller For Telescope using 555 IC
Component List

  1. U1: LM555
  2. Q1: IRL530N
  3. D1: 1N4007
  4. D2: 1N4148
  5. D3: Red LED 5mm
  6. C1, C2: 1000uF/16V
  7. C3, C4: 100nF/50V
  8. R1, R2: 2K2 ¼ w
  9. R3: 1K ¼ w
  10. P1: 47K Linear POT
  11. S1: SPST On/Off Switch
  12. J1: RCA Socket (6VDC INPUT)
  13. J2: RCA Socket ( HEATER OUTPUT)


Circuit diagram like in figure 1 above is Circuit Diagram Dew Heater Controller For Telescope using 555 IC. The most effective solution for dew control is the use of a heater to heat the optical surface above the dew point. The do-it-yourself heating system described here consists of two parts – a Heater Strip and a controller. The Heater Strip wraps around your telescope over the point your looking to protect from dew. Inside of the heater strip is a heating element that distributes heat into the strip. The strip is held in place by elastic/velcro attachments. Attached to the heater strip is an RCA output jack that will plug into the Controller.

The original article : "Dew Heater Controller For Telescope"

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