Yeah there is a difference. One is £24.96 plus £2.30 post. The other is £27.47 plus £2.49 post. Both do same job other than that.
 
The hot start fix is not a true solution more of at workaround, the only true solution is to retime the pump but that costs £££
 
The last thing the Hot start fix needs is a fecking microprcessor to do what can be done simply with a 555 timer.
 
Datatek said:
The last thing the Hot start fix needs is a fecking microprcessor to do what can be done simply with a 555 timer.
Click to expand...

Maybe they are trying to make it sound flash and is indeed the 555, i always preffered the 556 flip flop myself!!!
 
Yep they were plumbed in opposing gate state so when one half was open the other side was closed hence why is was uswd in flip flop circuits and hence its nickname of flip flop....
 
Saint.V8 said:
Yep they were plumbed in opposing gate state so when one half was open the other side was closed hence why is was uswd in flip flop circuits and hence its nickname of flip flop....
Click to expand...

Hmmm my data sheets show a 556 as 2 independant timers:confused: A 7474 is a flipflop:D
 
Datatek said:
Hmmm my data sheets show a 556 as 2 independant timers:confused: A 7474 is a flipflop:D
Click to expand...
Feck....

My total bad.....

You are right (as usual), so when I used a 556 to time a multiplexed circuit (for timing the scanning of a LED dot matrix sign) I must have wired the 556 up to use the two timers to trigger an alternating gate, to act as the flip-flop...when one timer circuit was active the other was resting, then when the second timer activated, this had the effect of restting the timer of the first timer circuit....but this was over 20 years ago, so my brain is no doubt a bit mashed about the specifics, hence my mistake...

I bow down to thee and d'off my cap once again....
 
Saint.V8 said:
Feck....

My total bad.....

You are right (as usual), so when I used a 556 to time a multiplexed circuit (for timing the scanning of a LED dot matrix sign) I must have wired the 556 up to use the two timers to trigger an alternating gate, to act as the flip-flop...when one timer circuit was active the other was resting, then when the second timer activated, this had the effect of restting the timer of the first timer circuit....but this was over 20 years ago, so my brain is no doubt a bit mashed about the specifics, hence my mistake...

I bow down to thee and d'off my cap once again....
Click to expand...


Are Flipflop timers suitable for left wing electrical circuits?:D
 
Last edited:
Blimey, is the 555 timer IC is still going strong? With all of today's whizzery - haven't they come up with something better yet? Perhaps some combined capacitor/relay gizmo, wired to hold a relay open with adjustable discharge via a potentiometer to earth?
 
StuckAgainSteve said:
Blimey, is the 555 timer IC is still going strong? With all of today's whizzery - haven't they come up with something better yet? Perhaps some combined capacitor/relay gizmo, wired to hold a relay open with adjustable discharge via a potentiometer to earth?
Click to expand...
Whooooosh...what the feck was that as it passed swiftly over his head....

As can be noted from my previous fail on this subject, I dutifully migrated to mechanical rather than electrical design engineering.....
 
StuckAgainSteve said:
Blimey, is the 555 timer IC is still going strong? With all of today's whizzery - haven't they come up with something better yet? Perhaps some combined capacitor/relay gizmo, wired to hold a relay open with adjustable discharge via a potentiometer to earth?
Click to expand...


Cars still run on wheels, no one has found anything better. The 555 is simple, reliable and cheap, Why reinvent the wheel? There are a number of alternatives and of course small package sizes and SMD's:)
 
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