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All information contained herein is the exclusive copyright of Round Bank Engineering Ltd and is not to by copied,
duplicated or otherwise distributed without the express permission of Round Bank Engineering Ltd, Unit 7, Victoria
Business Park, Halifax, UK, HX1 5ND - +44 (0) 1422 647177
–
Analogue Input
The analogue input is marked on the drawing above and is found on the pin header.
Connect the external analogue input between the “
GND
” and the “
0-5V
” connections
The analogue input runs through an RC low pass filter. This provided discrete filtering of the
analogue signal to ensure the signal is not affected by noise, as well as introducing a hardware slew
rate of the input signal.
NOTE: applying voltages over 5V to this input can permanently damage the controller. Take care
to ensure you have this correctly.
Onboard Pot
The onboard pot is marked on the drawing above and can be used to adjust speed if required.
NOTE: the onboard pot is a small trimmer pot and is not designed for constant adjustment. Care
must be taken when adjusting this that you do not over turn the pot as this can break the end
stops and lead to permanent damage.
UART Connections
The UART connections are highlighted on the wiring diagram above. These accept a max voltage of
3.3V on the RX or TX pins.
NOTE: applying voltages in excess of this will lead to permanent damage.
3V3 max voltage on either the RX or TX pins. The UART connections can be connected directly to
another microcontroller, or connected to a PC Serial Port using an
FTDI cable “TTL
-232R-
3V3”
. This
can be purchased on line at
NOTE: Ensure the RX and TX lines are crossed over to enable correct communication. Ie, TX from
PC goes to RX of the controller, and RX from PC goes to TX of the controller. Also, ensure a
common GND between the devices.
If another Microcontroller is used for communication, ensure the distance between the devices is
kept as short as possible and twisted pairs of the RX and TX lines are used. Contact us @
for any additional information with regards to the UART ZDA protocol for the
ZDBL30MUL-48.
