The microcontroller is programmed to mix two PPM signals and add up to 4 descrete channels.

user programmable:

output 1 to 24ch

input any PPM

constant frame rate or constant sinc

3 buttons can be set as on/off, 2pos., 3pos.

4th button only on/off or 2nd PPM input

output polarity

to simulate 2 or 3 position switch use double/tripple clicks

Config. codes:

6.1.1 on-off button function

6.2.2 set 2 pos. switch

6.3.3 set 3 pos.switch

7.1.X output PPM X channels

7.2.X limit PPM input A to X channels

7.3.X limit PPM input B to X channels, if entered 10 or more the input disconnected(use button on the same pin)

7.4.1 constant frame rate 25ms

7.4.2 constant sinc 5.5ms

7.5.1 output PPM negative

7.5.2 output PPM positive

7.6.1 input A pulled up (5k Ohm)

7.6.2 input A high impedance (Hi-Z)

To set button function eneter code using the same button

Set config. using any buttons 1-3

button 4 (ppm-in B, microcontroller 1st pin) doesn't accept any codes

bottom side of PCB has pads for 2 buttons (1 and 2)

supply voltage 3.3-5v

input/output sampled 512step

there is almost no latency added because input channels placed into output buffer without waiting for frame to complete

always make sure input PPM 5v or less, if pulses swing high connect series resistor 1k.

$22