Another Arduino based project. This time an W8TEE and K2ZIA Antenna Analyzer.
Purchased the PCB from https://qrpguys.com/w8tee-k2zia-antenna-analyzer
Not a kit so sourced the components. Easy to order from china off eBay. Took about 2 weeks for all the bits to come in.
Assembled and she started but the SWR for a 51ohm dummy load was off the scale.
The audrino and screen are ok. Checked and double checked solder joints so needed to verify the DDS and SWR bridge operations.
My old Dick Smith device is not cutting the mustard so borrowed an oscilloscope from Lacky VK3ALM. Traced the signal into the SWR bridge and nothing out. Checked the components and well my bad as the 51ohm resistors were in-fact 51K ohm. Bit of a difference. Replaced and off she went !
Downloaded the latest WA2FZW software from IOGroups – https://groups.io/g/SoftwareControlledHamRadio/files/Improved%20Analyzer%20Software
The documentation and a debugging guide are available from this group, essential information.
Use a case from radio parts (CB8808). Yes there is a pimple in the middle. No intention to remove as works fine.
So far have scanned all my antennas at home. I can recommend this device. Not a kit but the process to source and assemble was fun.
45 in 1 box Sensor Kit
I’ve picked up one of the 45 sensors kits from eBay.This kit contains;
1.Arduino PS2 joystick module
2. Infrared sensor receiving module
3. Laser head sensor module
4. Temperature and humidity sensor module
5. Infrared emission sensor module
6. 5V relay module
7. Avoidance of the sensor Intelligent car infrared sensor photoelectric switch
8. ARDUINO finger detection heartbeat module
9. High sensitivity microphone sensor module
10. Metal touch sensor module
11. Flame sensor module
12. 3-color LED module
13. Hunt sensor module
14. Linear magnetic Hall sensor
15. Rotate the encoder module
16. Active buzzer module
17. Magic light cup module
18. Small passive buzzer module
19. Digital temperature sensor module
20. Light Breaker Module
21. Temperature sensor module
22. Two-color LED total negative module 3MM
23. Mercury opening module
24. Hall magnetic sensor module
25. 3-color full-color LED smd module
26. Arduino mini reed module
27. Tilt switch module
28. Colorful flashing LED module
29. Push the key switch module
30. Photoresistor module
31. Vibration switch module
32. ARDUINO percussion sensor module
33. Temperature sensor module
34. Analogy Hall Magnetic Sensors
35. Microphone sound sensor module
36. Large reed module
37. Two-color LED module
38, breadboard power module
39, ultrasonic module
40, MP1584EN step-down module
41, SD card reader module
42, gyroscope module
43, soil modules
44, DS1302 clock module
45, water level module
The “user manual” that comes in the case is a picture in the lid for a 37 in one kit so will work through each one at a time.
- JSON – https://github.com/bblanchon/ArduinoJson
- Nordics nRF24L01 (2.4GHz RF) – http://maniacbug.github.com/RF24/
- The digital pins 0 and 1 are used for serial communication. As long as you aren’t doing serial communication (including uploading sketches), you can use them for other purposes but you loose the ability to communicate and up load sketches.
- The analogue pins are for analogue input only not analogue output. You can use them like any other pin by referring to them as pins 14 to 18. They can be a digital input or a digital output.
- Arduino works with 5 V and Rasp Pi with 3.3 V. Add a resistor divider to lower the voltage to something between 2.2 and 3.4 Volt. At divider with a (bottom) 3K3 and a (top) 2K2 resistor will divide the 5V to 5x(2.2+3.3)/3.3= 3V, so yes its possible to use many of the modules, but they are probably designed for 5V devices.