Ramsey UT5 Manual de usuario descargar pdf (Pagina 6)

UT5 - 6

Phase 1: BASIC PC BOARD ASSEMBLY:

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1. Install 10K resistor R1 [brown-black-orange].

 2. Install 10K resistor R2 [brown-black-orange].

 3. Install 1K resistor R4 [brown-black-red].

 4. Install 1K resistor R5 [brown-black-red].

 5. The 555 IC may be soldered directly to the PC board without worry, but you may use a 8-pin DIP socket (your

own) if you prefer. Use the same care in soldering such a socket and inserting the IC as you would in direct

soldering of the chip. Note that one end of the IC is marked by a dot, notch or band; this end MUST be oriented as

shown on the PC board layout.

 6. Install the 555 IC.

 7. Install C2, .01 uf (marked .01 or 103 or 10nf).

 8. Install NPN transistor Q1 with the flat side facing the nearest edge of the PC board (connection points C,D and

E).

 9. Install C3, .01 uf (marked .01 or 103 or 10nf).

This completes installation of all parts that remain constant for all UT5 applications, although R4 could be changed to

accommodate certain timing needs without replacing R3.

Phase 2: PLANNING TIMING AND MODE:

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10. R3 may be the trimmer pot supplied or any potentiometer of your own choice. This control may be soldered

directly to the PC board, or to wires permitting panel mounting, etc.

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11. After considering your intended application, install R3.

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Ramsey UT5 Manual de usuario Pagina 6