Hey guys,
It's been a long time since I was deep into analog type electronics and I need some help.
I've got a boost converter circuit that is taking a 3.6v input from a lipo battery and boosting it up to 34v. Next i've got a PIC chip that I will be programming to pulse one of the output pins at about 20 hz so i can make a bell ring (or you could think making a relay click on and off)
The goal here is to have a 3v battery make an actual bell ring.. think doorbell or 70's telephone ringer bell.
I've tested the step up converter and when I connect the 3v input to the step up converter and the 34v output to the bell coil, it has enough power to pull the hammer and make the bell ring. but i need to pulsate the output to make it ring like a telephone.
So now i need to get my low voltage output pin form the pic chip to trigger a transistor or something and complete the circuit from the 34v output to the bell so i can making it ring.
I guess what I'm looking for is an electronic relay basically.
I was thinking I could do this with maybe a 3904 transistor and maybe a diode?
My thoughts are that my pin out form the PIC chip (i think this is about 3v) would go to the base of the transistor, then connect the collector to ground, and the emitter to a diode and then to the other wire on the coil then have +34v going directly to the other wire on the coil?
Would this work or is there a better simpler way?
Can someone help me draw me up a simple schematic?
Thanks in advance for any help.
-Tavis
It's been a long time since I was deep into analog type electronics and I need some help.
I've got a boost converter circuit that is taking a 3.6v input from a lipo battery and boosting it up to 34v. Next i've got a PIC chip that I will be programming to pulse one of the output pins at about 20 hz so i can make a bell ring (or you could think making a relay click on and off)
The goal here is to have a 3v battery make an actual bell ring.. think doorbell or 70's telephone ringer bell.
I've tested the step up converter and when I connect the 3v input to the step up converter and the 34v output to the bell coil, it has enough power to pull the hammer and make the bell ring. but i need to pulsate the output to make it ring like a telephone.
So now i need to get my low voltage output pin form the pic chip to trigger a transistor or something and complete the circuit from the 34v output to the bell so i can making it ring.
I guess what I'm looking for is an electronic relay basically.
I was thinking I could do this with maybe a 3904 transistor and maybe a diode?
My thoughts are that my pin out form the PIC chip (i think this is about 3v) would go to the base of the transistor, then connect the collector to ground, and the emitter to a diode and then to the other wire on the coil then have +34v going directly to the other wire on the coil?
Would this work or is there a better simpler way?
Can someone help me draw me up a simple schematic?
Thanks in advance for any help.
-Tavis