UM1542 datasheet(31/43 Pages) STMICROELECTRONICS

Part #	UM1542

Description	Cold thermostat kit based on AC switches and the STM8S003F3

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

31 / 43 page

UM1542

Additional pads

Doc ID 023172 Rev 1

31/43

Appendix C

Additional pads

Additional pads were added on the board to allow the user to customize his own board, for

example to replace the two push buttons for temperature order setting with a potentiometer,

add LEDs for further temperature orders, etc. Functionality of additional components is not

implemented. These pads are shown in Figure 14 and 15 and include:

●

One LED replacing the TEMP push button (remove 0

Ω resistor R19, fit LED D11 and

resistor R48).

●

One LED replacing the buzzer (remove 0

Ω resistor R9 and fit LED D12 and resistor

R50)

●

One more push button replacing LED2 (remove R33, fit R22, R45, C35 and push

button SW5).

●

One potentiometer replacing the TEMP+ push button (remove 0

Ωresistor R20, fit R21,

C34, and potentiometer R44).

Figure 15.

Placement of additional pads

AM12251v1

Additional pads

UM1542 Datasheet(PDF) 31 Page - STMicroelectronics