I like to alter the triggering of a reed contact, so that this contact only gets halve of the original pulses coming from a magnet on a turning wheel. Dependig on the turning speed, the pulses are about 1 to 6 Hz.
I was thinking of adding an extra reed contact for this wheelmagnet and some circuit (555 based?) that only 'let through' every other pulse, so I get a 2:1 ratio.
So after 2 pulses at the new reed contact, an output is triggerd to activate an electro magnet, which in his turn triggers the original reed contact.
This circuit from the new reed contact upto the electro magnet, is in fact placed 'in between' the original magnet and original reed contact as a matter of speaking.
So my questions:
1. Who knows a suitable simple diagram to realise this, preferable working on battery (9V)?
Any idea on battery live? Does is it need a on/off switch to save battery when not in use?
2. It only needs to be a small electro magnet for the reed contact, I didn't find any ready available online, maybe I can use the magnet from a buzzer? These exist in ranges 1.5-12VDC, 15-30mA and are quite small.
3. Or maybe some whole other approach is possible, without changing the origal reed contact input though?
I found a similar circuit http://www.ecircuitslab.com/2012/05/tachometer-pulse-divider.html
but can this one handle the input reedswitch and output electro magnet?
I was thinking of adding an extra reed contact for this wheelmagnet and some circuit (555 based?) that only 'let through' every other pulse, so I get a 2:1 ratio.
So after 2 pulses at the new reed contact, an output is triggerd to activate an electro magnet, which in his turn triggers the original reed contact.
This circuit from the new reed contact upto the electro magnet, is in fact placed 'in between' the original magnet and original reed contact as a matter of speaking.
So my questions:
1. Who knows a suitable simple diagram to realise this, preferable working on battery (9V)?
Any idea on battery live? Does is it need a on/off switch to save battery when not in use?
2. It only needs to be a small electro magnet for the reed contact, I didn't find any ready available online, maybe I can use the magnet from a buzzer? These exist in ranges 1.5-12VDC, 15-30mA and are quite small.
3. Or maybe some whole other approach is possible, without changing the origal reed contact input though?
I found a similar circuit http://www.ecircuitslab.com/2012/05/tachometer-pulse-divider.html
but can this one handle the input reedswitch and output electro magnet?