#### turningjapanese

##### New Member

Hi all,

I am trying to come up with a circuit to manually control my automatic gearbox on a 4x4.

The gearbox has two solenoids to select the gear. I shall refer to them as S1 and S2.

In 1st gear S1=on S2=off

2nd gear S1=on S2=on

3rd gear S1=off S2=on

4th gear S1=off S2=off

i understand the order is decimal 2,3,1,0

(or if we swap S1 and S2 over 1,3,2,0)

i have identified this as a kind of 2 bit binary counting.

What i am looking for is a simple circuit which has 2 momentary switch inputs, one to count up, and one to count down. The circuit also needs 2 relay outputs which i can then use to control the solenoids.

In an ideal world a seven segment display showing the gear would be brilliant.

I understand this is easy to achieve with a PIC but i have very limited programming experience and no equipment for this, i do however have a basic grasp of electronics.

Any help would be much apreciated

Thanks in Advance

Stacy G Johnson

I am trying to come up with a circuit to manually control my automatic gearbox on a 4x4.

The gearbox has two solenoids to select the gear. I shall refer to them as S1 and S2.

In 1st gear S1=on S2=off

2nd gear S1=on S2=on

3rd gear S1=off S2=on

4th gear S1=off S2=off

i understand the order is decimal 2,3,1,0

(or if we swap S1 and S2 over 1,3,2,0)

i have identified this as a kind of 2 bit binary counting.

What i am looking for is a simple circuit which has 2 momentary switch inputs, one to count up, and one to count down. The circuit also needs 2 relay outputs which i can then use to control the solenoids.

In an ideal world a seven segment display showing the gear would be brilliant.

I understand this is easy to achieve with a PIC but i have very limited programming experience and no equipment for this, i do however have a basic grasp of electronics.

Any help would be much apreciated

Thanks in Advance

Stacy G Johnson

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