T&L Publications

That's what I had in mind and why i wanted to use an asychronous 4-bit up/down in the first place, which apparently doesn't exist.

I think you missed the point. Diodes are not going to send a certain number of timed pulses to an analog switch.

The original button->bcd design was done with a bunch of diodes and pull up resistors, though.

I do enjoy road courses so there are times where I'll be in 4th and have to slam the brakes and downshift to 1st to make a real tight hairpin. I really don't need to skip gears going up, its just going down. Once I get into microcontrollers I'll probably redo this, but I'm not into them yet. Its onl...

Its up to 1.7 Mil and still not met the reserve.

But they offer low monthly payments!

Actually, that is something like my design. This is what i've come up with. Gear is in BCD, with 0 = R, 1 = 1, etc. Button entry block - consists of a couple logic gates arranged so that pushing the gear button outputs its 3 bit BCD value. Its initially being designed for a 4 speed but i could upgra...

I just subscribed in early september, haven't gotten my october yet. They said that would be my first issue...

Guess I need to do that 'free online with print' signup thing.

I'm finishing up my design for an H-pattern gear shifter that interfaces to a console video game wheel that only has gear up and down buttons. It only uses a couple discrete logic ICs. I need it to keep track of what gear its in, and I designed that part of the circuit to use a 4-bit binary up/down ...

I'm looking for some pointers into this... I want to build a digital tach for my car. I'm not looking to do anything microcontroller based (at least at this point in time). From what I understand, it either emits a pulse every revolution or twice a revolution, which i've been able to condition this ...