Ramsey Electronics COMPUTEMP CT255 Manuel d'instructions télécharger pdf (Page 13)

SBRGB • 13

Time to make a few decisions. Your SBRGB

can be configured in a few different ways

depending on how you want to use it. Things

such as the operating voltage (6 VDC or any

range from 7 to 12 VDC) and the optional

positioning of D1, J1, and J2 (top or bottom

side of the board) will determine which steps

you will now follow. Here are your choices:

POWER SUPPLY (A

for 6VDC, B for 7 to 12VDC operation)

 6A

. 6 Volt power source (such as two 3 Volt lithium cells). Do not install

VR1. Use the provided piece of buss wire as a jumper to connect from the

output of D3 (pin 1 input of VR1) to the input of U1 (pin 8 output of VR1).

This bypasses the voltage regulator on the bottom side of the board (no

silkscreen) and allows lower voltage operation. Clip off any excess wire

after it is soldered in place. Note the dashed line on the top silkscreen side

indicates this optional configuration when VR1 is not used.

 6B

. 9 Volt power source (7 to 12 VDC), install the 78L05 voltage regulator

(VR1). Again, pay close attention to the small dimple in one corner of the

IC used to indicate pin 1. There are a few different conventions used in the

industry to note the pin-out of ICs but there should be a notch or a obvious

mark to make things easy to work with. If there is no notch then refer to

the diagram below for the position of pin 1. Pins are always counted from

the lower left of the IC when you can read the writing on it. Align pin one

as before with U1 and mount it in the same fashion.

Pin8

Notch

Pin8

Notch

Pin1

Pin 1

Pin 16

Count Counterclockwise

writing facing you

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 19 20

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Ramsey Electronics COMPUTEMP CT255 Manuel d'instructions Page 13