Status July 2020

MCP and EFIS The MCP and both EFIS panels are fully functional and after I realized that I had forgotten to connect the GND of my electronics to the GND of the external backlight dimmer and had fixed this, the whole system is stable, also with the backlight LEDs embedded at the PCBs. Radio panels … More Status July 2020

Engine starter switch

At Thingiverse.com a 3D printable design for a solenoid engine starter switch can be found. Unfortunately the design for the axes is missing and the knob must be pushed in also for the CONT and FLT switch positions, while this normally is only required for the GRD position (as confirmed by someone who has access … More Engine starter switch

MCP – autothrottle switch, ‘active on’ version

As mentioned in the previous blog I have created a new variant of my solenoid autothrottle switch that is ‘active on’, i.e. by using a momentary ON toggle switch (1121S ON-ON + Momentary) the electromagnet (12V) must be powered to keep the switch in the ON position. Without current through the electromagnet the switch flips back to the … More MCP – autothrottle switch, ‘active on’ version

Yoke (EN)

In the Facebook Home Cockpit Builders Group I found a robust mechanism for the yoke column. For the column itself I bought a 60 mm PVC pipe and 90 degree bend in the local DIY shop Assembling of the mechanism was straightforward, drilling the two 10 mm holes through the PVC pipe must be done … More Yoke (EN)

Digitally controlled friction and PCB ground planes

After replacing the servo D-axis to fix the backlash in the left throttle handle I’ve been testing a power transistor to drive the clutches as an alternative to the relays. This worked fine, but I noticed that there were still synchronization problems between the left and right throttle handles, mainly near the middle throttle positions. … More Digitally controlled friction and PCB ground planes

Arduino control of the throttle quadrant

Before ordering the large and relatively expensive throttle quadrant PCB some real-world testing of the circuits was done, controlled by the Arduino. The first test was to see that the clutches were correctly switched off by the limit switches. They were, e.g. when a handle reaches full throttle position, but often (but not always) the … More Arduino control of the throttle quadrant