Hi all:
Just stumbled upon this forum and joined hoping to get some help.
I have a fountain at our church that was built from scratch by an artist and I need some control circuitry. One of our members started on the project but his health has deteriorated and he cannot find his schematics. So-
Requirements –
Sense the water level to stop the fountain pump if the water level is too low.
Automatically control a 24vac irrigation valve to fill the reservoir.
Bonus –
LEDs to show which probe is under water.
Shut down the system if water level is too high [fill valve sensor shutoff fails].
Potential issues –
Access to the sensor probes will be under several inches of rock. Therefore maintenance needs to be low [such as ac vs. dc to minimize electrolysis] or good probe designs. This is Las Vegas so 8% humidity and 110+ degrees heat [normal summer] causes evaporation to be critical.
Current resources [partially install parts from previous design] –
110 to 24 v transformer
110 to 12/6 v transformer
7812 voltage regulator
Full wave bridge rectifier
(2) 24v coil relays that can handle appropriate current of the pump & valve.
60 minute mechanical timer [treat as the 110v on/off switch].
I have some experience with electronics. I used to build TTL logic circuits with gate chips, flip-flops, etc. when Radio Shack still had tube testers. Nothing since, so I am very rusty.
Thanks in advance for any help.
Bob
Just stumbled upon this forum and joined hoping to get some help.
I have a fountain at our church that was built from scratch by an artist and I need some control circuitry. One of our members started on the project but his health has deteriorated and he cannot find his schematics. So-
Requirements –
Sense the water level to stop the fountain pump if the water level is too low.
Automatically control a 24vac irrigation valve to fill the reservoir.
Bonus –
LEDs to show which probe is under water.
Shut down the system if water level is too high [fill valve sensor shutoff fails].
Potential issues –
Access to the sensor probes will be under several inches of rock. Therefore maintenance needs to be low [such as ac vs. dc to minimize electrolysis] or good probe designs. This is Las Vegas so 8% humidity and 110+ degrees heat [normal summer] causes evaporation to be critical.
Current resources [partially install parts from previous design] –
110 to 24 v transformer
110 to 12/6 v transformer
7812 voltage regulator
Full wave bridge rectifier
(2) 24v coil relays that can handle appropriate current of the pump & valve.
60 minute mechanical timer [treat as the 110v on/off switch].
I have some experience with electronics. I used to build TTL logic circuits with gate chips, flip-flops, etc. when Radio Shack still had tube testers. Nothing since, so I am very rusty.
Thanks in advance for any help.
Bob