HC(Hand Controller) and Temp probe for ZWO EAF
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This is the HC(Hand Controller) housing and drawing for the ZWO EAF.
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Model information
- Source
- Printables
- Category
- Physics & Astronomy
- License
- Creative Commons — Attribution — Share Alike
Hi everyone,
I recently made a Hand Controller (HC) for the ZWO EAF.
Since my previous DIY focusers (built for MyFocuserPro2 or OnStep) weren't compatible with ASIAIR, I ended up purchasing a genuine ZWO EAF. However, once I installed it, I noticed that you can't manually adjust the focuser when the power is off. Realizing a hand controller was practically essential, I decided to build one.
I simplified it. For the temperature probe, instead of adding extra circuitry, I designed it so you simply unplug the HC and plug in the temp probe directly.
Here is the schematic:
I have also attached the 3D printing file for the housing, so you can print your own if you'd like.
Attached file:
HBX_V2.3mf
BOM (Bill of Materials)
The required parts and estimated costs are listed below (total material cost is around $5.70):
Item | Qty | Unit Price (USD) | Link / Notes |
4-pin 3.5mm audio socket | 1 | $0.43 | |
4-pole 3.5mm cable (Male-Male) | 1 | $2.13 | |
3-pin toggle switch | 1 | $0.31 | |
12mm push switch | 2 | $0.43 | |
NTC 3950 100K ohm temperature sensor | 1 | $1.06 | |
3-pole 3.5mm cable (Male) | 1 | $0.78 |
[additional]
M3 insert * 4
M3x10mm Bolt *4
Below are photos of the internal wiring and a video showing the HC in action:
Temperature Probe Usage
The temperature probe uses a non-polarized NTC 100K ohm thermistor.
If you purchase a 3-pole 3.5mm stereo plug, simply connect the wires to the tip and sleeve terminals (the ring is not used).
