Ampère 55mA pulse driver (French clocks)

The 55mA pulse driver provides pulses with a fixed current of 55 milliamperes (switchable to 65mA with DIP switch 1). Default: one pulse every 30 seconds.

• Includes battery box for 4x 1.5V AA batteries (batteries not included)
• Including connection terminals
• Includes Velcro for mounting

Suitable for electric slave clocks from Brillié ATO Charvet-Delorme

• For one or two movements (double-sided clock)
• With DC Jack and USB-C connection for power
• 55mA pulses with variable voltage between 0.9 and 3.5 volts (fully automatic)
• Selector switch 55mA / 65mA (DIP switch 1: down 55mA, up 65mA) for clocks that require slightly more current
• No series or adjustment resistor required

These movements consume little power and are therefore very suitable for battery operation.

Pulses

The 55mA current is automatically regulated by the electronics on the pulse generator. As a result, a series or adjustment resistor is not required. If a clock does not run reliably on 55mA, move DIP switch 1 up to 65mA. With this fixed current, the voltage has become variable again. This depends on the movement, but also, for example, on the resistance in the wiring. The voltage is automatically set to the correct value.

By default, the Ampère 55mA has the configuration below (DIP switch 1 down, 55mA), which works in almost all cases:

• Pulse polarity: Alternating (bipolar)
• Pulse frequency: 1 pulse every 30 seconds (or 1 per second)
• Pulse Length: 50, 100, 150, 300 milliseconds (small)

See configuration options for all possibilities.

Is the movement still good?

Use a multimeter to measure the resistance of a movement as an indication of whether it is still OK:

• A Brillié (or similar) movement will measure a resistance of about 5 to 10 Ω (ohms).
• Measure without the movement being electrically connected.
• A very low value (approaching 0) indicates a short circuit, probably in the coil.
• A double-sided clock also measures 2x the resistance value, because the movements are in series.

Double-sided clock

The Ampère 55mA provides current-controlled pulses, so multiple movements must be connected in series to the pulse driver.