is there a kit to convert a 9 volt battery input to a 24 volt output. or one that can be modified to accomplish this? i am trying to use an MK111 kit as a timer to run a ‘slave’ clock in the place of a ‘master’ clock system.
Please explain more in detail what you want. An MK111 is not a very exact timer! Using this as a master clock? I don’t know … Why do you need 24 Volts? The MK111 works on 12 Volts.
a slave clock usually runs off of a master clock. the master puts out one 24volt pulse every minute to energize an electromagnet that advances the movement one click/one minute. so i have an old school house slave clock that i am having fun with trying to convert it to just a time keeping clock without removing the original movement. online for $100+ one can buy a circuit board timer/impulser that accomplishes this powered by 6-8 1.5volt aa,c,d cells. i am just trying to do this using the MK111 as a timer but then need a battery driven device as the impulser. trying to find a fun, inexpensive way of doing that on my own(not much of a nerd on this stuff, but having fun). so i can link d,c,aa batteries in a battery holder to get 12 volts (or maybe a 9 volt battery) and try to find a simple elegant way to step it up to the needed 24volts to drive the electromagnet without paying the $100+ for a ready made solution. if there is a better velleman kit to accomplish this, just let me know. (and the MK111 is a poor timekeeper, i agree. best i can adjust it for my use has it off about 5 mins per day). any thoughts and help is most appreciated. thanks.
Ok, clear!
Easy to to when you start with 24 Volts but from 9 V perhaps not so simple. What current does the electromagnet needs?
i am not smart enough to answer that question. not much. a very small solenoid, with a short travel. microamps?? this is what i am trying to make the equivalent of but on my own: piexx.com/index.php?main_pag … ducts_id=5
Can you measure the resistance (ohms) of it? If the coil needs a very small current (but uA I believe not: it will be mA I guess), it could be possible with a DC/DC converter.
500 ohms i believe.
so i have the 24volt need figured out. is there a way to make the MK111 more accurate? component substitution? or is there another better kit that can work as a switch also? any help is appreciated.
Ok, that 24V thing was the most difficult to solve in an easy without too much batteries. In the past Velleman had a crystal time base. That was a good start to deduct clock pulses from.
i could not find anything that indicated a crystal time base in the velleman catalog. do they still make it? also, is the MK188 kit more accurate for timing than the MK111 kit. seems like the MK188 would accomplish my timing goal also, but only if it is more accurate of a timing device(pause can be set more accurately)(pulse timing is not important)
No, it is out of production for many years already. But if you find one, it would be very interesting.
Don’t know if the MK188 is more accurate: works also on an internally generated clock of the PIC and these are rather good but also not perfect.