Sensor shield for Arduino

Because i want to connect multiple sensors and servo motors to an Arduino, i make myself a shield that allow me to do that.
This shield board plugs on top of an Arduino and makes it easy to connect to all the digital and analog inputs and outputs.
This shield is compatible with:
-analog and digital sensors,
-servo motors,
-serial displays,
-ultrasonic sensors,
-serial bluetooth modules,
-i2c sensors and module,
-GPS receiver,
-growe modules,
-buttons, potentiometers, ...

Parts list:
homemade pcb,
2 pcs. 6 pin stackable connectors,
2 pcs. 8 pin stackable connectors,
12 pcs. 4 pin pinhead connectors,
8 pcs. 3 pin pinhead connectors,
20 pcs. 100nF smd ceramic caps (optional, not required to place all)

Arduino compatible Attiny85 USB Stick

This board is compatible with Digispark and Trinket version of arduino software
.
For this I upload micronucleus tiny85 bootloader using an usbasp programmer before I soldered attiny cip on the board.For connecting and programming see: http://digistump.com/wiki/digispark/tutorials/connecting
For uploading bootloader you can use arduino as programmer.

Parts list:
Attiny85 microcontroller,
2 pcs 3.6v zenner diode,
2 pcs 27 ohm resistors,
1.2 k ohm resistor,
2 pcs 100nF capacitors,
1 low dropout schottky diode,
2 pcs 6 pin female connector,
USB a male connector.

All pins can be used as Digital I/O
Pin 0 → I2C SDA, PWM
Pin 1 → PWM
Pin 2 → I2C SCK, Analog
Pin 3 → Analog In (also used for USB)
Pin 4 → PWM, Analog (also used for USB)
Pin 5 → Analog In ( if reset is disabled)

Real-time room temperature and humidity

A simple page that displays the room temperature and humidity

 

Arduino Compatible Development Board

Arduino Web Server with ENC28J60

                         A simple page that displays the room temperature.

 ..................................

 

Low cost Ethernet shield with ENC28J60

Microchip's ENC28J60 is a 28-pin, 10BASE-T stand alone Ethernet Controller with on board MAC & PHY, 8 Kbytes of Buffer RAM and an SPI serial interface. Target applications include VoIP, Industrial Automation, Building Automation, Home Control, Security and Instrumentation.

The ENC28J60 runs at 3.3V, while the ATmega328 runs at 5V. Normally this is a major problem,  but input are 5v tolerant . That means no level shifting is needed on the 5V lines controlled by the ATmega328 (CS, SCK, SI). The Tristate Buffer is used to shift the lines controlled by the ENC28J60 (SO, INT) from 3.3V to 5V. The lines never need to be put in a high impedance mode, so just tie the output enable line to ground."

Here is the schematic:

The PCB layout:

Here is the PCB fully populated with the parts all soldered in place:

Component Tester

The last project that i built it is a component tester, which is based on AVR-Transistortester by Mark Frejek. 
And here is the modified version further developed by Karl-Heinz Kübbeler.
You'll find all firmwares and  documentation  at http://www.mikrocontroller.net/svnbrowser/transistortester/.

Here is the schematic:

 The PCB layout:

And here is the final result:

Here is a list of the parts used in this project:

Part	Value		Package	Description
C1	100nF		C025_050-025X075	CAPACITOR
C2	1nF		C2.5-2	CAPACITOR
C3	10nF		C2.5-2	CAPACITOR
C4	22pF		C2.5-2	CAPACITOR
C5	22pF		C2.5-2	CAPACITOR
C6	100nF		C025_050-025X075	CAPACITOR
C7	100nF		C025_050-025X075	CAPACITOR
C8	100nF		C025_050-025X075	CAPACITOR
C9	100uF		E5-10,5	POLARIZED_CAPACITOR
C10	10uF		E2,5-6E	POLARIZED_CAPACITOR
D1	1N4148		DO35-7	DIODE
D2	SCHOTTKY		DO35-7	Schottky Diode
D3	SCHOTTKY		DO35-7	Schottky Diode
D4	1N4148		DO35-7	DIODE
DIS1	TUXGR_16X2_R2		TUXGR_16X2_R2	Tuxgraphics LCD display 16x2 characters reflective, with background light
IC1	ATmega8/168/328		DIL28-3	MICROCONTROLLER
IC3	LM7805		78XXL	VOLTAGE REGULATOR
ISP	ISP		ML6	HARTING
J1	POWER_JACKPTH		POWER_JACK_PTH	Power Jack
JP1	+9V		1X01	PIN HEADER
JP2	GND		1X01	PIN HEADER
L1	10µH		0207/10	INDUCTOR
L2	10µH		0207/10	INDUCTOR
LED1	green		LED5MM	LED
Q1	BC557C		TO92-EBC	PNP Transistror
Q2	BC547B		TO92	NPN Transistor
Q3	BC547B		TO92	NPN Transistor
Q4	8,000 MHz		HC49/S	CRYSTAL
R1	10K		0207/10	RESISTOR
R2	10K		0207/10	RESISTOR
R3	3K3		0207/10	RESISTOR
R4	3K3		0207/10	RESISTOR
R5	2K7		0207/10	RESISTOR
R6	27K		0207/10	RESISTOR
R7	100K		0207/10	RESISTOR
R8	680R		0207/10	RESISTOR
R9	470K		0207/10	RESISTOR
R10	680R		0207/10	RESISTOR
R11	470K		0207/10	RESISTOR
R12	680R		0207/10	RESISTOR
R13	470K		0207/10	RESISTOR
R14	10k		PT-10S	Potentiometer
R15	33-270		0207/10	RESISTOR
R16	33K		0207/10	RESISTOR
R17	2K7		0207/10	RESISTOR
R18	47k		0207/10	RESISTOR
S1	Start Test		B3F-10XX	OMRON SWITCH
SV2	TEST PINS		FE05-2	FEMALE HEADER
SV3	TEST		MA03-1	PIN HEADER
VREF1	LM336 / LM4040		TO92-VREF	VOLTAGE REFERENCE

   

Software Version 1.07k Specifications:

Measurment Range: 
   -Resistor:0.5Ω - 50MΩ.   
   -Capacitor:25pF - 100000uF.
   -Inductance:0.01mH - 20H.
 Features:
  -Operates with ATmega8, ATmega168 or ATmega328 microcontrollers.
  -Automatic detection of NPN and PNP transistors, N-channel and P-channel MOSFET, diode (including dual diode),Thyristor,Transistors, resistors and capacitors.
  -Automatic detection of pin layout of the detected part.
  -Measuring of current amplifcation factor and Base-Emitter threshold voltage of bipolar transistors.
  -Detection of the protection diode of bipolar transistors and MOSFETs.
  -Measuring of the Gate threshold voltage and Gate capacity value of MOSFETs.
  -Resolution of resistor measurement is now up to 0:01 values up to 50M are detected.
  -For resistors below 2100 also the measurement of inductance will be done,
  -Capacitors with values from 25pF to 100mF. The resolution can be up to 1 pF .

  -For capacitors with a capacity value above 0:18 F the Equivalent Serial Resistance (ESR) is

measured with a resolution of 0:01Ω.

  -For capacitors with a capacity value above 5000pF the voltage loss after a load pulse can be
determined. The voltage loss give a hint for the quality factor of the capacitor.
  -Zener-Diodes can be detected, if reverse break down Voltage is below 4.5V. 
  -LED is detected as diode, the flux voltage is much higher than normal.
  -Selectable facility to calibrate the internal port resistance of port output and the zero of set
of capacity measurement with the selftest.
  -Display battery voltage

  Edit:
Component Tester schematic Eagle
Component Tester board Eagle
Component Tester bottom pdf
Component Tester top pdf
Component Tester top silkscreen pdf
Component Tester box silkscreen psd

Software