John_vk5po
- Sep 21, 2014
- 2
- Joined
- Sep 21, 2014
- Messages
- 2
Hi from southern Australia guys!
Here is my "hopeful application"
A Chinese made rotary encoder ( open collector A/B o/puts) attached to a rotating shaft (on a roller inductor in an antenna tuning unit) then interfaced via a LS 7183 QUADRATURE CLOCK CONVERTER IC that in turn ( I was hoping!!!) pulses a "Chinese" LED up / down counter module. (0-9999). The LED counter module "saves" the last known number when powered down, so very handy!
This circuit will not work. RBias was set at 10 Mohms, but the pulses appear to be TOO SHORT to register. Another friend suggested sourcing a leading edge type decoder.
The counter works a treat when I hit the u/d inputs with a pulse gen.
The 7183 must not be suitable for what I was told it would do.
The encoder is a 360 pulses per rev. So many applications I could use it on, aside from the one listed above. for instance, a VERY ACCURATE angle indicator as 1 pulse can be seen on a led counter as 1 degree. (for adjusting the elevation of my 50Mhz antennas to point accurately at the moon for bouncing radio waves back to earth.)
I have been pulling my hair out for a year or more now, so I would appreciate ANY ADVICE... even another way to achieve what I wish to do.
Over to some advice please.
Thanks.
John
Here is my "hopeful application"
A Chinese made rotary encoder ( open collector A/B o/puts) attached to a rotating shaft (on a roller inductor in an antenna tuning unit) then interfaced via a LS 7183 QUADRATURE CLOCK CONVERTER IC that in turn ( I was hoping!!!) pulses a "Chinese" LED up / down counter module. (0-9999). The LED counter module "saves" the last known number when powered down, so very handy!
This circuit will not work. RBias was set at 10 Mohms, but the pulses appear to be TOO SHORT to register. Another friend suggested sourcing a leading edge type decoder.
The counter works a treat when I hit the u/d inputs with a pulse gen.
The 7183 must not be suitable for what I was told it would do.
The encoder is a 360 pulses per rev. So many applications I could use it on, aside from the one listed above. for instance, a VERY ACCURATE angle indicator as 1 pulse can be seen on a led counter as 1 degree. (for adjusting the elevation of my 50Mhz antennas to point accurately at the moon for bouncing radio waves back to earth.)
I have been pulling my hair out for a year or more now, so I would appreciate ANY ADVICE... even another way to achieve what I wish to do.
Over to some advice please.
Thanks.
John