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The Spanish Knight

A model of a Spanish knight jousting on his horse

This model of a Spanish knight jousting on his horse was designed by Andreas Konkoly and was built from instructions given by Colin Hoare in the February 2012 issue of the Runnymede Meccano Guild Magazine.

The horse gallops on the spot, its tail moves as if caught by the wind, and the whole model rotates upon a turntable.

The Spanish knight
The Spanish knight

The knight close-up
The knight close-up

While the horse and knight generally follow Andreas’ original design, I redesigned the turntable enclosure to be more compact and to incorporate an electric motor in place of the original clockwork motor.

The motor, gearing and guide wheels inside the turntable enclosure
The motor, gearing and guide wheels inside the turntable enclosure

The turntable fits on top of the enclosure and rotates via a gear that engages with a pinion inside the enclosure.

The underside of the turntable
The underside of the turntable

The horse rests upon two static rods mounted on the turntable, and its gearing is driven via a pinion on the centre rod (not shown) engaging with a contrate wheel.

The turntable resting upon the turntable enclosure
The turntable resting upon the turntable enclosure

The horse
The horse

Coin operation

By 2017 the turntable enclosure’s plastic plates had cracked beyond repair, so I replaced them with new flexible plates.

I also added a coin slot to the turntable enclosure which accepts any coin and activates the motor on a one minute timer implemented using a 555 monostable circuit. The motor requires only 60mA to run, so is driven directly from the 555 output.

The Spanish knight with a coin slot built into the turntable enclosure
The Spanish knight with a coin slot built into the turntable enclosure

Stripboard layout

The stripboard layout diagram for the 555 circuit is given below. It includes a switch which enables or disables the timer function, and an LED that indicates if the motor is running. There are also three mounting holes at standard Meccano spacing.

Stripboard layout diagram for the one minute timer circuit
Stripboard layout diagram for the one minute timer circuit

Parts list

Part Quantity
10kΩ 0.25W carbon film resistor 1
220Ω 0.25W carbon film resistor 1
560kΩ 0.25W carbon film resistor 1
100nF 25V ceramic disc capacitor 1
100µF 16V electrolytic capacitor 1
1N4148 150mA signal diode 1
5mm red LED 1
555 timer 1
8-pin DIL socket 1
SPDT toggle switch 1
20 column x 15 strip stripboard 1

Built in March 2012 • Rebuilt in March 2017