ATOM Diy module

J

JackieTreehorn

New Member

• Sep 15, 2021

• #141

I would like to try building an ignition module using an SCR, here is my design. I would appreciate any input on this design

 

Last edited: Sep 17, 2021

debe

Active Member

• Sep 20, 2021

• #142

Im not a design engineer, so cant realy help you. What i presented was a reverse engineereed Atom transistor driven ignition module. i had enough trouble by trial & error finding a suitable ignition transistor to work reliably.

 

C

ColonelM

New Member

• Apr 13, 2022

• #143

Hey, JackieTreehorn... Did you build that SCR module? How did it turn out?

 

R

rigmo

New Member

• Apr 18, 2022

• #144

Hi
Can we use replacement - equivalent for 2SD1071 ⇒ 2SD1245 2SD798 U910 (BU910...912, 2SD798...99, 2SD1245
BU910* KT812B*) ?
and has anyone tried mosfet

 

debe

Active Member

• Apr 18, 2022

• #145

Havent bothered to try any equivalent transistors or mosfet, as i have about 20 2SD1071 transistors. So at the age of 73 yrs i dont think i will need any more.

 

C

ColonelM

New Member

• Apr 20, 2022

• #146

Hello debe! Have you any thoughts on Mr. Notaras' 1992 patent update for the ATOM circuits... here: https://patents.google.com/patent/US5111798A/en ?

 

R

rigmo

New Member

• Apr 21, 2022

• #147

I'm interested in making an SMD version .. what type of capacitor do I need? is good ceramic MLCC 470nF? I find also SMD 2W 1.2 1.5kohm

 

Last edited: Apr 22, 2022

C

ColonelM

New Member

• Apr 22, 2022

• #148

Atom units were semi-SMD per pictures? Discrete transistors with SMD resistors? Not sure about the capacitor. I am curious to hear about equipment to make SMD assemblies. Also also Debe... how does one remove plastic shell from an Atom unit without wrecking the circuit board? Is the circuit functional after plastic is stripped?

 

debe

Active Member

• Apr 22, 2022

• #149

I used a soldering iron to carefuly remove the plastic on the Atom module. Once the components were exposed the module worked fine. Since the original module works fine on the 4 engines i have them on ive left it at that.

 

R

rigmo

New Member

• Apr 22, 2022

• #150

SIR DABE
I'm interested in making an SMD version .. what type of capacitor do I need? is good ceramic MLCC 470nF? I find also SMD 2W 1.2 1.5kohm

 

Last edited: Apr 23, 2022

R

rigmo

New Member

• May 19, 2022

• #151

Hi I just recived parts.. MOQ... ill try make two to see if its work... in next few days i make pcb
question... bc337 can be repalced with BC817?

 

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