Question 1
I have bought 2 types of solder boards from radioshack.
One has copper rings around the wholes the other does not.
When I solder on the copper ring one the solder melts to the board and to the component leg.
But when I use the non copper ring board the solder only melts to the component leg. Is their anything I can get to make the solder melt to the board and the component leg? The non copper ring boards at radioshack cost alot less.
Do you need special chemicals to use these?
Question 2
I have a 8 ohm, 2 watt speaker. I also had an LM386 amplifier. I am wondering if I can use these 2 components with a microphone to hear my voice out of the speaker? Note I have computed the current from the 2watt power and 8 ohm resistance. Is this current the current that would create the sound provided I use enough capacitors to get it in the 20HZ 20kHz range. (hearing range)
Question 3
Why , when the phone is off the hook nobody can make a phone call to you. I would think the circuit is complete when the phone is off the hook.
And the phone circuit is not complete when the phone is on the hook.
Also this leads to the question of why the phone rings AC 90 volts 20 Hz if the phone circuit is not complete?
I have bought 2 types of solder boards from radioshack.
One has copper rings around the wholes the other does not.
When I solder on the copper ring one the solder melts to the board and to the component leg.
But when I use the non copper ring board the solder only melts to the component leg. Is their anything I can get to make the solder melt to the board and the component leg? The non copper ring boards at radioshack cost alot less.
Do you need special chemicals to use these?
Question 2
I have a 8 ohm, 2 watt speaker. I also had an LM386 amplifier. I am wondering if I can use these 2 components with a microphone to hear my voice out of the speaker? Note I have computed the current from the 2watt power and 8 ohm resistance. Is this current the current that would create the sound provided I use enough capacitors to get it in the 20HZ 20kHz range. (hearing range)
Question 3
Why , when the phone is off the hook nobody can make a phone call to you. I would think the circuit is complete when the phone is off the hook.
And the phone circuit is not complete when the phone is on the hook.
Also this leads to the question of why the phone rings AC 90 volts 20 Hz if the phone circuit is not complete?