Hey all - I've been working on adapting a schematic I found here on youtube (versions of which seem widely available elsewhere).
I've successfully breadboarded a build of the above switch (version A in the drawing below). The only differences in my build (A) versus the above are the value of R1 and the fact my supply voltage is +9V instead of +5V. Even so, my build of the circuit works great. When I clap, I get DC voltage on the output of the 555.
The main alteration I require is to replace the electret condenser mic with an 1/8" input jack (which will be connected to the headphone jack of an iPhone). The schematic for the revised circuit is version B.
For some reason, however, as soon as I remove the condenser mic I get a constant voltage on the output of the 555 - there's no fluctuation and the signal from the input jack has no effect. I've experimented with the value of C1 in this version (the advice I was given was to work in the range of .01uF to .1uF) and every other variation I can think of to no avail. The circuit only works when the condenser mic is in it.
Does anyone have any idea how I might revise this design for use with a 1/8" jack? Or even a different design entirely? I just need the thing to work.
Ultimately I'm planning to run the circuit off +12V. I'll be using the output of the 555 to trigger a relay which will cause a solenoid to fire. I need the solenoid firing in time with a click track, hence the desire for an 1/8" jack. The solenoid is actuating the movement of a toy, making it appear to dance in time with a song.
I'd be most grateful for any advice. I'm happy to provide any more info that might be useful.
Thanks in advance!
I've successfully breadboarded a build of the above switch (version A in the drawing below). The only differences in my build (A) versus the above are the value of R1 and the fact my supply voltage is +9V instead of +5V. Even so, my build of the circuit works great. When I clap, I get DC voltage on the output of the 555.
The main alteration I require is to replace the electret condenser mic with an 1/8" input jack (which will be connected to the headphone jack of an iPhone). The schematic for the revised circuit is version B.
For some reason, however, as soon as I remove the condenser mic I get a constant voltage on the output of the 555 - there's no fluctuation and the signal from the input jack has no effect. I've experimented with the value of C1 in this version (the advice I was given was to work in the range of .01uF to .1uF) and every other variation I can think of to no avail. The circuit only works when the condenser mic is in it.
Does anyone have any idea how I might revise this design for use with a 1/8" jack? Or even a different design entirely? I just need the thing to work.
Ultimately I'm planning to run the circuit off +12V. I'll be using the output of the 555 to trigger a relay which will cause a solenoid to fire. I need the solenoid firing in time with a click track, hence the desire for an 1/8" jack. The solenoid is actuating the movement of a toy, making it appear to dance in time with a song.
I'd be most grateful for any advice. I'm happy to provide any more info that might be useful.
Thanks in advance!
