Zeal Engineering Daughterboard with Dual VR Conditioners

Originally designed for the FC RX-7, the Zeal Engineering Daughterboard is a versatile expansion board created by Ken Culver, one of the lead developers of the MS2/Extra and MS3 firmware. Now available in kit form, this board adds advanced input and output capabilities to your MegaSquirt ECU and has been successfully used across a wide range of vehicle applications. Key Features: Dual VR conditioners – Built using LM1815 adaptive circuitry, ideal for crank/cam signal processing Three general-purpose digital outputs – Each rated for up to 1 amp One high-current PWM output – Capable of handling up to 3 amps, perfect for boost or idle control 12V tach output driver – Suitable for first-gen RX-7 tachometers and many other vintage applications Compatibility: Works with MS1/Extra and MS2/Extra firmware Compatible with V2.2, V3.0, and V3.57 MegaSquirt mainboards This board is a great choice for those looking to expand their ECU’s capability with VR signal processing, PWM control, and additional outputs—all in a compact, DIY-friendly package.