Late this few weeks I’ve been hunting and finding Solar Panels which can be use to power up various items. Among the Solar Panel that I’ve found is listed below.
1. 14 volt panel – obtained from a hobby shop
2. 4.5 volt panel – scrapped from a damaged garden light
3. 2 volt panel – scrapped from some car accessories
Why would I need solar panel for?
Just to satisfy my hobby in electronics. The place where i’m staying (Alor Setar, Malaysia) always receives equal amount of sunshine, (near the equator), except for monsoon season of course. So I’m thinking that, it’s kinda shame if I let it waste.
Among of my plans would involve of hooking up one of these panels with a regular car battery and inverter to power up my backyard lamp and various electronic projects that depends on solar power. I’m looking for any good schematic to aiding me, not too complex, but good enough for a beginner.
I would appreciate any of your suggestions, btw.
Great news to those who are using paypal to conduct online transactions! Paypal now supports Malaysian banks natively! Meaning that you can directly withdraw paypal money to your bank account without jumping into many hoops anymore!
For more information, please refer to “How to link Paypal to Malaysian Bank account?” article by Webshaper.
Here are the videos of my chickens dust bathing, taken a while ago. Ayam koko has already passed away on October 2008, bless her.
One brave soul (9W2PJU)has made Garmin POI of ASTRA and MARTS repeater location available via Garmin by publishing the Garmin POI file on his website. Although from what I read, some people has complaint that the location information stored in the POI is inaccurate, IMHO the exact Amateur Radio Repeater location itself isn’t that important as the information that contains its frequency, tone and shift which can be use to access the repeater.
From my observation, the POI of the Garmin does not store the exact location of the repeater (probably for security reason) but the general location of the repeater is good enough for travelers to discover new repeaters and use them while traveling to unfamiliar places, keeping in touch with fellow ham operators.
Please refer to 9W2PJU website for the latest POI files.
Tak-Tenna is a type of compact antenna which is suitable for those who has space constraints on erecting their HF antenna. It is small enough that a 40 meter Tak-Tenna is just about the size of a 4-element Yagi 2 meter antenna. Here’s photographs of 40-meter Tak-Tenna in action. Compare that to the typical 40-meter dipole or Inverted-V configuration ! Thus it has the advantage of space-saving and unobtrusive setup when compared to other design of HF-antenna.
Tak-Tenna is available in 3 models – 40, 20, and 10 meters, with the 40 meter model can be use on 40, 30, 20, 15, and 10 meters with a tuner.
Refer to this article: “The TAK-Tenna™ Review – A Limited Space HF Antenna Review” for further review on Tak-Tenna performance and advantages.
Tak-Tenna can be ordered from the official Tak-Tenna website
Here’s the simplest antenna that you can build to transmit with your HT or mobile rig when you have nothing else to rely to. The configuration gives you a 3.5dBi gain and it is simple to construct when you’re at outdoor.
I built this antenna, specially for hitting repeaters during lightning storm, as my usual high mounted antenna might attract lightning.
This antenna can be built using any conductive wire. Though, for my configuration, I use thick copper wires with the length A = 0.525m and B=0.4815m. The A-B angle is about 100-110 degree. It gives SWR 1.0 between 145.5MHz – 145.8MHz and SWR 1.3 at 148.0MHz, the edge of 2 meter amateur radio band.
I’ve found an interesting website, MP Change, which can change your photographs into moving video complete with blinking eyes and head movement realistically.
You should try it for yourself!
This is a Morse code practice oscillator has been built by N2UHC
The circuit is a simple oscillator circuit based on a 555 timer IC. There are only a few components needed to construct it.
IC1- 555 timer
R1 – 150k
R2 – 1K
C1 – 10 uF electrolytic
C2 – .01 uF ceramic disc
9V battery clip
See the circuit in action (my own video) that I’ve built myself.
Here’s a 12 Element UHF Yagi antenna that I designed for my friend, 9w2azv. He’s going to use that antenna for his client, that needs to hit a repeater 10 kilometers away from their location.
Here’s are the measurement for the antenna :
Polar Plot for the Antenna (E-Plane)
Polar Plot for the Antenna (H-Plane) at 2 Wavelength height
Here is the YagiMAX file : 10 Element Yagi 457MHz