Pulse Generator (NL412)

Pulse Generator (NL412)

A small, handheld, general purpose pulse pulse generator which can be used to start experiments along with other applications.

  • Small handheld general purpose pulse generator
  • Can be used to
    • Start experiments
    • Command the gate of a train of pulses
    • Used with an NL102G to Buzz electrodes
  • Self-powered by a standard internal 9 V battery

Item# Description U.S. List Price Quantity
72-4220 NL412 Pulse Generator - General Purpose, Hand Held
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The NL412 PULSE is a small, handheld, general purpose pulse generator which can be used to start experiments, command the gate of a train of pulses or be used with an NL102G to Buzz electrodes. The NL412 is self-powered by a standard internal 9 V battery and is fitted with a 2 m lead terminating in the standard Lemo connector.

Start On pressing the button the NL412 generates an active high pulse which will trigger remote modules.

Gating The front panel control on the NL412 provides control for output pulse durations over the range of 1 to 10 ms. Setting this control allows different durations of trains of pulses when the NL412 is combined with a Pulse Generator such as the NL301.

Use with NL102G When used with a NL102G (that incorporates external Buzz control circuitry) the duration of the Buzz is set by the front panel control.

*Technical Note - NL102G use.

During intracellular micro-electrode recording, cell penetration is often facilitated by use of a Buzz button, a feature included on the front panel of the NL102G DC pre-amplifier. Pressing the Buzz button fully activates the capacitance compensation circuitry, causing the amplifier voltage to oscillate. This oscillation often aids passage of the electrode into the intracellular millieu. In certain situations, it may be necessary to operate the Buzz button in combination with microelectrode manipulation, making the front panel location of the Buzz button less convenient for the user. To make the Buzz feature more accessible, a remote NL412 Pulse box has been developed by Digitimer Ltd. This small handheld unit provides control over Buzz duration (1-10ms) and has a single push button for Buzz pulse delivery.

The NL412 is connected via its own 2m long Lemo cable to a modified version of the NL102G, incorporating an external Buzz control input socket. Existing users of NL102G modules can have the modification made at Digitimer Ltd.

Button LED Only produces an output pulse on Press (not release) Amber - illuminates for approximately 250 ms after each press
Pulse Duration
Range 1 to 10 ms
Accuracy Better than 20% at all scale markings
Level 9 V, with new battery
Rise and Fall Times < 100 µs
Battery Standard 9 V, 6LR61 style. (Non-alkaline supplied) Wwe recommend the Duracell Ultra MN1604 alkaline battery
Power Consumption < 5 µA (static)
Cable 2 m (nom) with standard Lemo connector fitted
Dimensions, H x W x D 105 x 61 x 28 mm plus 15 mm on d for knob
Weight < 170 g including battery