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That's what I'm thinking. Ray

I have the timing/tach light on all the ignitions and I could make it so one could use the RCEXL one or add something in. Speaking of RCEXL I have sourced out the same parts that they use such as the Hall-Effect holder and sparkplug caps & wire. I am also working on a programmable Krober Magneto...

Thanks bluejets & mccreamark about the Pro Mini. I also looked at the Pro Micro which uses the ATmega32U4 which is nice and it should work. It has the 0 &1 ex-int which I need and of course the PCINTs. I to have been looking at the TI line and I'm committed to using the STM32 line with ARM M4...

I remember all that. I got ahold of Microchip for help with the PIC1619 but, they didn't seam to care about that chip. They also didn't seam to know much about the chip other than the basic resources so I started looking into other options. I really didn't want to take a lead on the 1840 because...

So why am I making these boards/systems? Well it's because I need them for myself and I figure others could use them also. Now I'm a bit of a perfectionist which means I'm usually never satisfied with something until I can abuse the sh_t out of it and it survives R&D. I've been fascinated by and...

For a really good spark I need 0.0025 seconds (2.5 milli-sec) between sparks for a good spark which means your radial could do 24,000 RPM. For the V8 which requires 4 sparks per rev would top out between 10,000 - 40,000 RPM using 1 coil, with 4 coils it would top out at 40,000 RPM using 12 volt...

Yah I guess I should have explained better. I could do the same setup as CH Ignitions which is a wasted spark setup for radials, that way there is no need for a cam sensor or dizzy. The sync pulse for #1 cylinder comes off the same rotating hub as the crank position signals. One has to remember...

Unfortunately because of health reasons I had to give up working on the ignitions 3 years ago and I'm just picking it back up. This all started years ago on RC Groups and I was part of the group working on a project called "Programmable-Open-Source-CD-Ignition-PIC1840". We did have running...

I can, I have a similar carb 8mm but for gas, I'll get you a drawing later during the next week. Ray

John you did not say if the carb you are using was originally a alcohol or gas carb. Alcohol carbs need a lot more fuel than gas engines. Gas engine carbs usually use a longer less tapered adjustment screw so that they aren't so finicky. Try to find a new gas screw or make one. Ray

Well I'm slowly finding time to make some model engine ignitions and for my race car. I am developing several different types of ignitions I am hoping to sell here, my web page, and on other sites. Once I have the designs ironed out I'll get a vendor membership for here and sell them. But in the...

The best place IMHO is here: https://www.rcgroups.com or better yet Semi Trucks and Construction Equipment. These people can answer any of your questions. Ray

Rudy the problem with your circuit cutting out at higher voltages is that you are grounding out the signal output with the points. I have and use the A1120EUA so I have some experience with it. The A1120 has a built-in voltage regulator and short circuit protection control, the 2 are seperate...

Wow, Charles there is actually a lot of things wrong here with your setup. I'll start with the Hall-Effect being blown. One thing that is being missed here is that you are using an automotive style ignition coil (transformer) where the negative side of both the primary and secondary are tied...

Auto advance can be done in several ways: #1 use the negative going side of the pulse. As the RPM increases the pulse width will decrease but, the start of the pulse will never change. Only the trailing negative going edge changes. If one uses the negative going edge, the timing will advance...

This is probably one of the best small low battery voltage ignitions I have seen. The 555 timer can be modified to work very similar to almost all the electronic HEI ignitions used through out the world of distributor type engines or 1 cylinder, or 2 cylinder wasted spark. For example the...

At work we use to say that one got a poke. One thing about electricians is that we are curel buggers and laugh when someone gets a poke. But and this is a big but, is we also are very concerned when someone gets a severe shock such as a burn usually from a flash arc. I have had friends and a few...

I'll start by saying that I'm an electrician (AAR railroad) and a electronics technologist, but I'm not going to get into how and why. Deerferdog your correct in saying that electricity can be dangerous, especially with an open ended generator. with an open ended (no output load) generator the...

I love it, please expand on it. I think it would make a great little engine dyno to measure Hp. Ray

Yup but it was across the wooden bench top and about 120,000 ionized volts (so much for safety), by the time I realized it, after about 10 seconds the spark started to fail. I blew half the output transistors. That was $60 worth, about $120 in today's value. Yup R&D - Research & Destruction LOL...