© <in der past>
David's Battle Circuit (DBC) & David's Battle Unit (DBU)|
The DBC is a Tamiya compatible battle circuit for Heng Long S&S tanks. It allows Heng Long owners to particpiate in battles using infrared "bullets" on an equal footing with Tamiya Full-Option tanks equipped with Tamiya Battle Units (TBU), complete with simulated damage affecting speed and variable weight classes. In addition, the DBC offers momentum simulation, and options to disable the "super-spin" feature and recoil while firing. A DBC requires either an Tamiya TBU, or a DBU sensor if battling is desired. A DBC is available in kit form.
This model of DBC (DBC HL) works with the stock Heng Long Smoke&Sound ESC&sound board (TK-RX13/TK-RX14/TK-RX18) and Heng Long Radio.
NEW: Version 1.6 with recoil blocking option! When enabled and firing, the Heng Long tank does not stop, jerk, or play the stock Heng Long firing noise, but instead plays a sound from the sound effect chip (if installed). Bypass option and momentum config jumper removed (jumper used for recoil option).
ORDERING AND PRICE INFO
Build instructions for DBC kit
Build instructions for DBU kit
Adding sound to version 1.5+
Instructions for connecting to the TK-RX18 board
Assembled DBC version 1.0 with IR LED from DBU kit
Assembled DBU version 1.0
DBU custom-installed on PzIII. IR LED has replaced the red airsoft warning LED. Note that mounting and filter is not included.
Very nice custom install job done by Matt. Mounting parts and filters are not included.
Features for current version:
After turning on the tank power switch and TX power switch, the DBC circuit loads the configuration from the jumpers then waits in "remote config" mode until the "Engine Ignition" button (with the key on it) is pressed on the TX. During this time, the configuration for "Super Spin Disable", "Block Recoil" and "Momentum" can be set.
Pressing the "K" button will fire the battle system. The DBC will then prevent further shots until the reload period has elapsed (depends on the weight setting of the tank). Pressing the button rapidly may appear to cause 2 shots, but only one actually occurs.
A hit is shown by the LEDs lighting up briefly, during this time the tank cannot fire.
After taking 1 hit, the tank will slow to approximately half speed.
After taking several hits (weight dependant), the tank will slow to approximately 1/4 speed
After taking full damage (weight dependant), the LEDs will light up and stay on to indicate desctruction and the tank engine will shutoff. The headlights will blink. After a few seconds, the tank will being starting up. Once the startup has completed, the LEDs will turn off and the tank will be able to move again. The tank will be temporairily invulnerable for a short period (weight dependant).
The tank will slowly accelerate and decelerate to emulate a vehicle with weight, depending on the weight setting. Braking can be accomplished by pushing the stick half-way in the opposite direction of travel. Hard braking can be accomplished by pushing the stick completely in the opposite direction of travel.
When the firing button is pressed while the "block recoil" feature is enabled, the IR signal is sent as normal, but the tank doesn't jerk or play the default sound effect. In order to maximize realism and battling fairness, the DBC instead plays a sound effect from the sound effect chip...this means that there is only one other sound effect available so it's played for both "regular hits" and the final "destruction hit". As a side benefit, the same electrical signal used to trigger the "firing" sound could also be used to optionally trigger a flash unit or cannon recoil unit.
If "block recoil" is left disabled (the default) the recoil and stock Heng Long sound functions normally, and the DBC plays a separate sound for both "hit" and "destruction".
Notes: Users may notice a slight decrease in perceived range (~10%). This is due to the DBC being more selective about what constitutes a valid signal. Accepting a wider range of signals causes the tank to operate oddly, including sporadic triggering of shots and ignition, which may not always be noticeable when not using a battle system.
The DBU requires filtering in order to operate outdoors, otherwise the range will be reduced to mere feet. I recommend trying horizontal baffles similar to the TBU, and using a visible light filter. A simple visible light filter can be made by cutting the dark portion off a developed 35mm film negative. This will absorb most of the visible light while passing the infrared signal through.
Previous Version 1.5 specs