| Linear Trigger Response |
HO and 1/32nd Scale Cars Require a SOFTouch™
HO and 1/32nd scale cars can be extremely sensitive to throttle input, particularly
when driven though tight corners on home or club tracks. The cars operate across a
wide voltage range and the handling characteristics of magnet and non-magnet cars
vary widely, as do racers' preferred driving styles. That's why JayGee Racing
developed software driven SOFTouch throttle control, an innovative approach to
giving racers a soft bottom end throttle response when they need it, with a broad
enough sensitivity range to handle their fastest and best handling cars.
SOFTouch throttle control changes both the shape of the trigger response curve and
starting voltage with a single control knob. At the lower sensitivity settings, the
transistor module's microcontroller is programmed to deliver a response curve
flatter on the bottom end for fine control of corner exit speed. As the sensitivity is
increased, the trigger response becomes more linear, as shown in Figure 1 (The
output voltage is represented as a percentage of track voltage to eliminate
differences between track power supplies).
Figure 1. Linear 200 SOFTouch Throttle Control
HO and 1/32nd scale cars can be extremely sensitive to throttle input, particularly
when driven though tight corners on home or club tracks. The cars operate across a
wide voltage range and the handling characteristics of magnet and non-magnet cars
vary widely, as do racers' preferred driving styles. That's why JayGee Racing
developed software driven SOFTouch throttle control, an innovative approach to
giving racers a soft bottom end throttle response when they need it, with a broad
enough sensitivity range to handle their fastest and best handling cars.
SOFTouch throttle control changes both the shape of the trigger response curve and
starting voltage with a single control knob. At the lower sensitivity settings, the
transistor module's microcontroller is programmed to deliver a response curve
flatter on the bottom end for fine control of corner exit speed. As the sensitivity is
increased, the trigger response becomes more linear, as shown in Figure 1 (The
output voltage is represented as a percentage of track voltage to eliminate
differences between track power supplies).
Figure 1. Linear 200 SOFTouch Throttle Control
In contrast, the trigger response in Figure 2 is completely linear regardless of
starting voltage. While too sensitive for HO and 1/32nd scale cars, a linear trigger
response is ideal for 1/24th scale slot cars. That's why JayGee Racing offers throttle
control chips with both linear response and SOFTouch throttle control.
Figure 2. Linear 200 Linear Trigger Response
starting voltage. While too sensitive for HO and 1/32nd scale cars, a linear trigger
response is ideal for 1/24th scale slot cars. That's why JayGee Racing offers throttle
control chips with both linear response and SOFTouch throttle control.
Figure 2. Linear 200 Linear Trigger Response
Linear 200 HO-1/32 Controller
You Can Feel the Difference
Controllers with a linear response curve feel overly sensitive to trigger position in the
bottom and mid range bands, making many HO and 1/32nd scale cars difficult to
drive. However, SOFTouch throttle control gives you a soft bottom end throttle
response when you need it, and a broad enough sensitivity adjustment for your best
handling cars. Since SOFTouch is a software controlled pulse width modulated
drive, the trigger response curve isn't affected as much as that of an analog
controller's built with bipolar transistors. The Linear 200 PWM MOSFET transistor
module will still deliver a soft bottom end throttle response, even when operated at
track voltages as high as 25 volts.
Controllers with a linear response curve feel overly sensitive to trigger position in the
bottom and mid range bands, making many HO and 1/32nd scale cars difficult to
drive. However, SOFTouch throttle control gives you a soft bottom end throttle
response when you need it, and a broad enough sensitivity adjustment for your best
handling cars. Since SOFTouch is a software controlled pulse width modulated
drive, the trigger response curve isn't affected as much as that of an analog
controller's built with bipolar transistors. The Linear 200 PWM MOSFET transistor
module will still deliver a soft bottom end throttle response, even when operated at
track voltages as high as 25 volts.
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