Experimenting the square wave oscillator kit
Square wave oscillator kit package overview
Originally uploaded by cultured_society2nd
I recently bought a square wave oscillator kit; cost me 20 bucks. I did fixed and experiment with it, I tell ya mine is more stable than this kit ha ha.
Well it has 6 different capacitors from Mylar, ceramic to electrolytic capacitors. All capacitors with different values thus produce different frequencies with 5V – 18V DC input.
Square wave oscillator kit info overview
Problem One
The disadvantage of this kit is caused by parallel connection on all different capacitors to IC 555 input trigger pin 2 and threshold pin 6. The jumper pin had been prepared for connection, but the problem conflicts when one jumper is connected thus only one frequency value will work.
Problem Two
Second problem is the output, in the manual diagram of the kit did not state any caution on audio output. Tried to just connect 8ohm small speakers to the output source, the result was the overheating of IC 555. I guess it lacked a resistor to DC ground.
Fix square wave oscillator kit
Solution
The solution was to connect the output to an amplifier audio input.
