That looks good, it has 50mA O/P load which is plenty good for the clockmotor. Datasheet says I/P and O/P decoupling is required, 0.1mF minimum. The solenoid is 6v at 600mA, is that OK for the IRF9410? Cheers. RMHC.
That looks good, it has 50mA O/P load which is plenty good for the clockmotor. Datasheet says I/P and O/P decoupling is required, 0.1mF minimum. The solenoid is 6v at 600mA, is that OK for the IRF9410? Cheers. RMHC.
Yes, it's rated for 7A.The solenoid is 6v at 600mA, is that OK for the IRF9410?
You mean 0.1μF.Datasheet says I/P and O/P decoupling is required, 0.1mF minimum.
Crutschow,How about this for a 1.5V regulator?
If Sw_Clock is the clock's switch contacts, then yes.Does it look workable to you?
Thanks a lot for the help.I am gathering up the components and will build the cct. and check it out. Once again many thanks. RMHC.If Sw_Clock is the clock's switch contacts, then yes.
Great.Thanks a lot for the help.I am gathering up the components and will build the cct. and check it out. Once again many thanks. RMHC.
Hi, Sorry to bother you but the IRF 9410 is a tiny package not really suitable for hand work. Is there a larger package version suitable for normal PCB work? I have looked in Mouser but don't really know what to look for! Cheers RMHC.Great.
Let us know how it works.
Many thanks my good man, the order has been placed. Cheers RMHC.One of these should work.
I looked for N-MOSFET, logic-level, through hole devices.
Hi Mr crutschow,One of these should work.
I looked for N-MOSFET, logic-level, through hole devices.
Many thanks. I will re-evaluate it on Friday. RMHC.The circuit, as is, needs the contacts to close for at least 100ms.
Try reducing the value of R3 to about 100Ω, and add a 1μF capacitor across R2.
The circuit should then respond to a shorter contact closure.
Hi Mr crutschow,One of these should work.
I looked for N-MOSFET, logic-level, through hole devices.
Hi, I hope you had a good thanksgiving yesterday. I have made the 2 changes you suggested and the solenoid now activates albeit a little sluggishly I think. If I put the 6v. directly across the solenoid coil it is pretty lively, but less so when the M1 mosfet triggers it. Can this be improved? By the way I am using small polarised caps because they are all I have. Is that OK or should I use a disc ceramic for C1? Many thanks for any more suggestions. RMHC.The circuit, as is, needs the contacts to close for at least 100ms.
Try reducing the value of R3 to about 100Ω, and add a 1μF capacitor across R2.
The circuit should then respond to a shorter contact closure.
You could try increasing the value of C1 and/or C4.If I put the 6v. directly across the solenoid coil it is pretty lively, but less so when the M1 mosfet triggers it. Can this be improved?
A polarized cap is okay for C1 as long as the (+) terminal goes to the input (connection to C4).By the way I am using small polarised caps because they are all I have. Is that OK or should I use a disc ceramic for C1? Many thanks for any more suggestions.
Thanks Mr C. I will try both those suggestions also I need to minimise arcing at the clock contacts which are VERY delicate..You could try increasing the value of C1 and/or C4.
If the contact closure time of the clock switch is short than you could just eliminate C1 and R1.
A polarized cap is okay for C1 as long as the (+) terminal goes to the input (connection to C4).
You didn't show the capacitor polarity on the schematic, which you should for any polarized capacitors.
Why did you change the regulator from the one I suggested?The only problem now is the power supply cct I got from the maker of the LDO- LD1117V. It has a no load current of 10mA
Hi Mr C,Why did you change the regulator from the one I suggested?