hardware configuration

controller

• obsolete: type: attiny26 - for the very first steps (most likely must be replaced by attiny861 because of too less flash memory)
• obsolete: speed: 2MHz internal calibrated RC oscillator, !!! manual load of calibration register required !!!
• see here
• fuses (lfuse, hfuse, efuse): 0x62, 0xDC, 0x1 -> BODLEVEL[0:1] especially programmed to '0' to activate 4.3V operating voltage observation

inputs port B

temperatures (amplified voltage drop of NTC thermistor driving with constant current)

inner: PB5 (pin 8) -> ADC8
outer: PB6 (pin 9) -> ADC9

command switches (high active, pulled down low)

btn1 (down): PB2 (pin ?)
btn2 (up): PB1 (pin 2)

outputs port B

solid state relays for operation of mixer motor coils with external LEDs (!!! max 5 mA !!!)

clockwise: PB4 (pin 7)
counter clockwise: PB3 (pin 4)

outputs port A -- alphanumeric LCD

CN = connector

mc port	mc pin	CN pin	LCD pin	signal
PA0	20	6	4	RS
PA1	19	7	5	RD/RW
PA2	18	8	6	EN
PA3	17	free
PA4	14	9	11	DB4
PA5	13	10	12	DB5
PA6	12	11	13	DB6
PA7	11	12	14	DB7
		3	1	GND
		4	2	VCC +5V
		5	3	contrast, 0 - 5V potentiometer controlled

input button and LED wiring

• connector name: X2 -> LEDs, X3 -> switch contact
  connectors are located on front panel PCB
• buttons: S4, S5
• btton type: ITT-SER-L
• supplier: reichelt elektronik
• order number: DTL 2 BL, DTL 2 RT

button 1 (S4, blue, down)
front panel		main pcb	signal	wire color
btn pin	CN pin	CN pin
1	X3.1	J4.3	down	white
2, 3	X3.10	J4.1	VCC +5V	brown
4	–	J4.2	GND (nc)	black
A	X2.5	J5.1	ccw	green
K	X2.12, X2.14	J5.3	GND	brown
button 2 (S5, red, up)
1	X3.3	J4.4	up	yellow
2, 3	X3.10	J4.1	VCC +5V	brown
4	–	J4.2	GND (nc)	black
A	X2.9	J5.2	cw	yellow
K	X2.12, X2.14	J5.3	GND	brown

forerun temperature sensor wiring

• cable type: RKMV 3-225/5 F
• supplier: Reichelt Elektronik
• order number: RKMV 3-5

CN pin	CN color	RKMV pin	RKMV color	signal
1	yellow	3	blue	IF_HIGH
2	vio	4	black	IF_LOW
-	-	1	brown	-

temperature receiver sensor wiring

• cable type: RSMV 4-225/5 M
• supplier: reichelt elektronik
• order number: RSMV 4-5

CN pin	CN color	RSMV pin	RSMV color	signal
1	red	1	brown	VCC +5V
2	white	2	white	GND
1	blue	3	blue	DATA
2	black	4	black	GND

temperature sender power supply wiring

• connector type: RSMCK
• supplier: reichelt elektronik
• order number: RSMCK 3

CN pin	CN color	RSMCK pin	RSMCK color	signal
1	red	1	brown	VCC +6V
2	black	4	black	GND
-	-	3	blue	-

isp programming adapter wiring

• name: X8
• type: Wannenstecker, 10-polig, gerade
• supplier: reichelt elektronik
• order number: WSL 10G

CN pin	signal	μC pin t861	μC pin t85
1	MOSI	1	5
2	VCC +5V	5	8
3	nc	–	–
4	GND	6	4
5	RESET	10	1
6	GND	6	4
7	SCK	3	7
8	GND	6	4
9	MISO	2	6
10	GND	6	4

230V~ SSR wiring

• name: X4-X7
• type: wago series 236
• supplier: me
• order number: W236-1 (naming in eagle layout editor)
• chassis connector type: STAKEI 3 N grau/grey

pcb CN pin	chassis CN pin	signal	color
X4	-	L1	black
X5	1	MIX_CW	red/black
X6	-	L1	black
X7	2	MIX_CCW	black
-	3	N	blue
-	pe	PE	gn/ye