I have a circuit which has a ATMEGA64 and about 17 LEDs. The micro is reading an analogue voltage from a pot and displaying that voltage using LEDs on board by turning various LEDs on or off. I am turning the LEDs on and off using transistors so the micros output current limits aren't exceeded.
The design works perfectly fine doing exactly what it should. No problems.
THE ISSUE IS WITH VHF INTERFERENCE. I had a handheld VHF radio transmitter. As soon as I press the transmit button it basically screws up the whole circuit. The voltages get affected all over the place and nothing seems to work.
I am thinking I need to filter the noise induced by the radio. But HOW? I have tried screened cables for connections. They DON'T work.