Hp00
Hp1
Hp2
Hp0/Sh1
![](https://3.bp.blogspot.com/-7rPwmV00KQo/WDjCwLKTdII/AAAAAAADDSk/yTCgkugpe50xOlRYwEalPSrum-pNB_zYQCLcB/s640/1.jpg)
They are robust (metal pole) easily installed and come complete with a diode on the common ground and resistors on all the other leads.
After many hours of work I now have all my signals installed, connected, and working under computer control...