H Bridge Designs For Switching electron extract , steam resonator and pwm to vic

here we add some versions of h bridge so builds have a easy access to joining parts

We are working

D

only 1 thing with there H=bridges

all transistors must be matched for beta
so either we go provide  matched pairs or teach people how to match their transistors

Basicly the matching can be done with a multi meter that has a hfe setting for transistors.
You put it in.
The multimeter says how much hfe (or also known as gain)
You match that hfe to the others and go
Even the same transistors can have different gains

here is a video about this I am sure people will comment on these methods https://youtu.be/JLXKffm7VF4

Doing this will make the h bridge more reliable.
And gives less change of cross conduction (which you don't want at all as it shorts the hell out of your h bridge)

Attached

here you have the bom
but.....
for r1 to r4 we have to select a good 0.2ohms 5 watt resistor.
all 100 ohm resistors are 2watt
all 1k resistors are 1/2 watts

These items Shared by anonymous group of builders.
it is open source

This can drive steam resonator, electron extract and led

if some one would like to post a faster mosfet version please
feel invited so we  make these things
zooom with switch speed etc


ATTACHED V1 H Bridge

DD

Version 2 Now done

with screen front back to help with bom speed

Now On OSK  https://oshpark.com/shared_projects/hCnea0Rz

 

Petlov did this one

https://youtu.be/namRpMcrd84