The IL-4A is a 4-channel lamp controller for annunciators.  It will sense active low or active high signals on 4 or more inputs, plus provide a lamp test function and the ability to provide dimming of all of the lamps. The installation guide describes the applications, and is also useful for understanding the IL-6A.  The IL-12A is three IL-4A devices on the same pcb.

 

Installation Manual

Source design is available:  contact Vx Aviation

The IL-6A is a 6-channel lamp controller for annunciators.  It will sense active low or active high signals on 6 or more inputs, plus provide a lamp test function and the ability to provide dimming of all of the lamps. There is no installation guide, so figuring out how it works is up to you.

The original device was packaged in a 25 pin backshell, similar to other products on this site.

Source design is available:  contact Vx Aviation

The TRX-232A is an 8-channel RS-232 Buffer, also configurable as a dual 4-channel Buffer.  It is specifically designed to buffer RS-232C signals that drive multiple loads, such as GPS receiver outputs, or convert portable GPS receiver outputs to legitimate and reliable RS-232C compliant signals.

Buffering of RS-232 signals increases system reliability by boosting the noise immunity of serial data lines that are excessively loaded or are not designed to drive multiple loads.

The TRX-232A also provides redundant diode-isolated power supplies and grounds, thus avoiding single-point failures caused by blown fuses or tripped circuit breakers.

 

TRX-232A, packaged in a D-SUB 25 connector shell

Installation Manual

Source design is available:  contact Vx Aviation

A few circuit boards are available for this device... $15.00 including shipping. Click here to order via PayPal

The SVX-1A is a Trim Servo and Motor Controller, capable of driving up to 5 amp loads.  It is totally solid state, with no failure-prone relays.  It has short-circuit and over temperature protection, and is capable of variable speed operation.  An external low-going input controls a pulse-width modulation (PWM) circuit that controls the motor speed without reducing torque.  Connecting this input to a grounded microswitch will speed up the servo operation when flaps are extended.

The motor is driven whenever either of the control inputs are grounded, with the two inputs controlling the motor's direction.  With neither input grounded, the motor is actively braked.

The prototype devices used a large copper area on both sides of the circuit board as a heat sink for the controller chip.  External terminations are made using fast-on connectors, but this is easily modified to a D-sub connector, if desired.

Source design is available:  contact Vx Aviation