The Injector Card

It Recieves a aignal from the

K2= Figure 12 - Variable Pulse Frequency Generator (L1)
Undertstanding the Signal From Q  to  K10 into Injector Card

What does that signail look like and what else does injector card receive in ?

Dan

That was the first card I built - same signal on all four outputs each one can have one of four values.  Value depends on pot setting on front panel.  I just set mine yesterday to try to get 41.237hz.  Closest I could get was 41.67hz with pot I have very touchy.

So with this setting you have one of 4 values available.  4.167khz, 416.7hz, 41.67hz and 4.167hz.  all are 5v level with 50% duty cycle.

To see screen shot of this signal see document attached to this post.
Frequencies output by Main Frequency Generator Board
« 15 months ago »Last edited 15 months ago

Frequencies output by Main Frequency Generator Board.pdf

This was my first post of my testing so did not have analysis and testing in title but has same basic setup.  I believe the main purpose of the board is to set analog frequency and to provide a Master sync signal to all his boards.

Earl

 
Just Wondering what Frequency would be on the k2 Q line out to K10    4.167hz?

That was the first card I built - same signal on all four outputs each one can have one of four values.  Value depends on pot setting on front panel.  I just set mine yesterday to try to get 41.237hz.  Closest I could get was 41.67hz with pot I have very touchy.

So with this setting you have one of 4 values available.  4.167khz, 416.7hz, 41.67hz and 4.167hz.  all are 5v level with 50% duty cycle.

To see screen shot of this signal see document attached to this post.
Frequencies output by Main Frequency Generator Board
« 15 months ago »Last edited 15 months ago

Frequencies output by Main Frequency Generator Board.pdf

This was my first post of my testing so did not have analysis and testing in title but has same basic setup.  I believe the main purpose of the board is to set analog frequency and to provide a Master sync signal to all his boards.

Earl

The four switches on the front panel are all connected to the same 4 signal sources so position 1 on each switch has the same input and output and output is then determined by switch position.    See table below actual value in the determined but what the output of the 555 is set to, in the table below that is 4khz.  You can see each switch position is 10 times less

              P1         P2         P3      P4     Output
SW 1    4khz     400hz    40hz    4hz       C to K3
SW 2    4khz     400hz    40hz    4hz       B to  K3
SW 3    4khz     400hz    40hz    4hz       Q to K10
SW 4    4khz     400hz    40hz    4hz       G to K11

Only change on output is frequency.  Voltage level is always the same.
Each switch output can be different or the same it will depend on switch setting.  However, it will be one of the 4 switch input frequencies. I have no idea which position will be used for K10.  My I guess that they will all be the same position but they do not have to be.

Also note that input to K3 is either B or M1.  Now G is the input to K11 which generates outputs M1 and M (same signal)  M1 goes to K3 and M to K8.  As the input to K3 must be less than 50hz or gate flat lines I expect  B and G are same value.  I have not looked at K11 to see what it actually does but expect it shifts the volt level up and down slightly.  In the case of K3 that does not matter as signal will be pulled back up to 5v logic level.  However, for K8 the analog voltage level matters.  It is possible k11 also shifts the frequency slight as the would change gate duration or it could do both.  In any case the whole system would change in sync.

Hope this helps and I have no problem with posting any of this information in the forum it that would help others.

Earl

I have not looked at the injector card at all so do not know which of the four values would be its input.

I answered some of this in my reply to you previous question.

I have not look at digital control means circuit in detail.  I just looked at datasheet for A6 74122 and output on pin 6 is the inverse of the the output on ping 8  so

M and M1 are same same signal
M2 is just the inverse of M and M1

M3 would be the inverse of M2
M4  the inverse of M/M1.

The additional inverter and and AND gates on outputs are added to isolate the device and drive the loads on the outputs.  Standard design practice.

This means all the signals would be in sync and only difference is if signal is inverted or not.  The datasheet shows this is a logic device so we are dealing with logic levels so voltage levels would not be the driving factor so that means we are dealing with a frequency change and not a voltage level variation on the output lines.  I think I had decide that when I at K3 but I am more sure of this after looking at data sheet.

This is consistent with Stan's discussion of changing gate size to increase or decrease gas production as changing frequency changes gates size.