Hello everyone,
I think I finally have a project I can build without having to study loads of electrical laws, etc.
At the moment it is called 'Just another microcontroller inside (an?) enclosure'.
I've made the circuit diagram, layout, etc. but I have a few questions:
1.) Should I be using polar electrolytic caps or non-polar poly caps for the high pass filter (HPF)?
2.) Are my values for the HPF correct (need 590Hz cutoff), and is it in the right place?
3.) Do I really need a pre-amp? I thought if I swapped pin 8 for 7 and 5 for 6 on one of the amps, resonant frequencies may cancel out (not shown on diagram.)
4.) Is there a simple way to stop the 'pop' sound when the switch is turned on?
5.) Can I reduce the voltage + current to the pre-amp to the minimum values, eg. 2V when original is 5? (to save battery).
6.) How to determine best batteries - Is 5*1.2V (1600mAh ea.) better than 1*7.2V 2000mAh?
Sorry for all the questions, I really want to make this work without having to re-do things 20 times. See pics below for more 'explanation'. Any help would be very much appreciated,
e.E.
edit: the last picture now shows the pins 7-8 and 5-6 swapped.
I think I finally have a project I can build without having to study loads of electrical laws, etc.
At the moment it is called 'Just another microcontroller inside (an?) enclosure'.
I've made the circuit diagram, layout, etc. but I have a few questions:
1.) Should I be using polar electrolytic caps or non-polar poly caps for the high pass filter (HPF)?
2.) Are my values for the HPF correct (need 590Hz cutoff), and is it in the right place?
3.) Do I really need a pre-amp? I thought if I swapped pin 8 for 7 and 5 for 6 on one of the amps, resonant frequencies may cancel out (not shown on diagram.)
4.) Is there a simple way to stop the 'pop' sound when the switch is turned on?
5.) Can I reduce the voltage + current to the pre-amp to the minimum values, eg. 2V when original is 5? (to save battery).
6.) How to determine best batteries - Is 5*1.2V (1600mAh ea.) better than 1*7.2V 2000mAh?
Sorry for all the questions, I really want to make this work without having to re-do things 20 times. See pics below for more 'explanation'. Any help would be very much appreciated,
e.E.
edit: the last picture now shows the pins 7-8 and 5-6 swapped.
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