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A 16F88 PIC Based Clock and Calendar using a Dallas DS1307 RTC Device for battery backed up timekeeping

I've been at it again, this time, I have coded for a clock that shows time and date, will keep time accurately with no DC applied as it is interfaced to a Dallas DS1307 timekeeper.

 VK2TIM
02/11/2009
A compact 1:1 Choke Balun with decent power handling, for less than $50

Here is a simple weatherproof choke balun, capable of 100w+ power handling, compact in size, neat looking and low cost.

 VK2TIM
17/10/2009
A GPS driven "No need to set" clock/compass/speedo

A GPS based clock using a 16F628A PIC, and a EM406A GPS Module - Hardware by VK2TIM, Original Firmware, design and concept by Ken, VK7KRJ

 VK2TIM
21/01/2010
Attenuator

An attenuator suitable for foxhunting and other equipment testing

 VK2BOS
19/09/2009
Audio Function Generator with Frequency and P-P voltage display

This is an audio signal generator that does sine or square wave, operates from 20Hz to just over 30Khz, has a frequency display with 1Hz resolution, and a P-P output voltage indicator with a resolution of 100mV.

 VK2TIM
04/12/2009
Building a Dummy Load and Measuring Power Accurately

The title says it all. This article is published with the permission of the author, Ken Kemski K4EAA.

 VK2FTTP
13/11/2009
Checking the Calibration of your SWR meter and constructing a dummy load.

There is a simple way to check if your SWR bridge is working correctly.

You will need a 5 watt resistor, not wire wound, of 75 ohms and 100 ohms.

 VK2XTT
16/10/2009
CTCSS Board

Circuit diagram and PCB layout for Tait Electronics TA-500 CTCSS Encoder

 VK2VSV
19/09/2009
FM900

Information about modifying a Phillips FM900 for Amateur use

 VK2VSV
19/09/2009
PIC based digital clock

A "Vanity" LCD clock that displays the current time and -your- callsign, using a 16F84A PIC Microcontroller

 VK2TIM
29/09/2009
Roger Beep Unit by Peter VK2PJZ

This unit is designed to run in line with your microphone so requires no modifications to your transceiver.

 VK2PJZ
12/11/2009
RT-85

Converting an AWA RT85 LOW BAND Transceiver to 6 Metres

 VK2VSV
19/09/2009
Suppressing RF Interference

Ferrite is your friend, and more often than not, the simplest solution to RFI problems.

 VK2TIM
29/09/2009