djstumerch
New Member
How can I measure the input and output impedance of a stomp box that I have made. I have built a couple of units for a university project, Wah Wah, Fuzz Unit and a Tremolo Unit. I'm creating a specs sheet and user manual.
So Far I have this:
Tremolo
Features
Merkie Modules Tremolo unit uses a low harmonic waveform to produce an enjoyable stuttering effect. This can be tweaked to the desired effect via two control knobs. A 1980’s Cmos chip has also used to keep the distortion levels low and a heavy duty push down switch as been included so the unit can be foot operated.
Specifications
• Input Impedance………… Ω
• Output Impedance…….... Ω
• Connectors………………….. x2 ¼’’ Jack Sockets
• Power Supply………………. 9V Battery (Alkaline for longer use)
• Current Draw……………….. 4mA (9V Battery)
• Size……………………………….. (L) 120 (W) 95 (H) 34 (mm)
• Weight……………………………
Panel Description:
1. Input Jack
¼’’ Jack socket for connecting a guitar
2. Output Jack
¼’’ Jack socket for connecting an amplifier or audio interface
3. Modulation Frequency Knob
Variable frequency range from 0.5 to 5Hz this enables the user to modulate the amplitude of the guitar signal.
4. Oscillator Operating Frequency Knob
The knob controls the frequency of the output triangular waveform, which can vary between 0.5 to 10Hz. This essentially controls the rate.
5. Push Down Switch (Latching)
A heavy duty push down switch as been included so the unit can be foot operated. This allows the user to bypass the circuit giving a clean or modulated signal.
6. On/Off Toggle Switch
A toggle switch as been included which breaks the circuit when it’s in it’s (off) state, this disconnects the 9V power that is being supplied. Toggle the switch (on) and this allows the current to flow from the battery to the circuit.
Any help or suggestions for this would be greatly appreciated.
Cheers
Stu
So Far I have this:
Tremolo
Features
Merkie Modules Tremolo unit uses a low harmonic waveform to produce an enjoyable stuttering effect. This can be tweaked to the desired effect via two control knobs. A 1980’s Cmos chip has also used to keep the distortion levels low and a heavy duty push down switch as been included so the unit can be foot operated.
Specifications
• Input Impedance………… Ω
• Output Impedance…….... Ω
• Connectors………………….. x2 ¼’’ Jack Sockets
• Power Supply………………. 9V Battery (Alkaline for longer use)
• Current Draw……………….. 4mA (9V Battery)
• Size……………………………….. (L) 120 (W) 95 (H) 34 (mm)
• Weight……………………………
Panel Description:
1. Input Jack
¼’’ Jack socket for connecting a guitar
2. Output Jack
¼’’ Jack socket for connecting an amplifier or audio interface
3. Modulation Frequency Knob
Variable frequency range from 0.5 to 5Hz this enables the user to modulate the amplitude of the guitar signal.
4. Oscillator Operating Frequency Knob
The knob controls the frequency of the output triangular waveform, which can vary between 0.5 to 10Hz. This essentially controls the rate.
5. Push Down Switch (Latching)
A heavy duty push down switch as been included so the unit can be foot operated. This allows the user to bypass the circuit giving a clean or modulated signal.
6. On/Off Toggle Switch
A toggle switch as been included which breaks the circuit when it’s in it’s (off) state, this disconnects the 9V power that is being supplied. Toggle the switch (on) and this allows the current to flow from the battery to the circuit.
Any help or suggestions for this would be greatly appreciated.
Cheers
Stu