ISPJUNO - Portable ISP Programmer - User Guide V0.84 – 17/04/20
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3.8 Power the Juno with an External USB 'Power bank'
The ISPjuno programmer can be powered via an external
'USB Power bank'
as shown in the
illustration below.
This method of powering the programmer uses a dedicated
‘USB to 2.1mm Jack - 9V – DC to DC
adaptor cable’
which is available from Equinox Technologies.
This cable plugs into a PC USB port or USB
‘Power Bank’
via a standard USB Type A connector.
The other end of the cable features a 2.1mm jack plug which plugs into the mating 2.1mm jack ‘power
socket’ on the ISPjuno programmer. The cable features a
‘DC to DC converter’
which steps up the
voltage from the USB power source to +9V which is suitable for powering the ISPjuno programmer.
Instructions (follow the order below):
1. Ensure the the ISP cable from the programmer is disconnected from any target system.
2. Plug the USB Type A connector end of the cable into the USB socket on the USB
‘Power
Bank’
.
The USB
‘Power Bank’
should auto-sense the load of the
‘DC to DC converter’
and
power up the converter circuitry.
3. Then Plug the 2.1mm jack plug end of the
‘USB to 2.1mm Jack - 9V – DC to DC adaptor
cable’
into the programmer
'DC Power'
jack socket of the programmer as shown in the
illustration above.
--> the programmer should power up and show text on the display.
Important note
Ensure that the the
‘USB to 2.1mm Jack - 9V – DC to DC adaptor cable’
is plugged into the
programmer
'DC Power'
jack socket
first and then plug the jack plug into the programmer.
This
makes sure that the 9V power supply ral has settled before powering the programmer.
