Search found 6 matches

Thank you I checked it And there is 5 volt between neg bat pin and pin 1 of 78L05 so the problem lies elsewhere in the circuit. The search continues.
Thank you for helping me resolve this part of my ...

Understood I will try to be more clear. I measured -4.5 v between r64 and r65 the virtual ground and pin 2 of the 78L05 if there should be no connection between pin 2 of 78L05 and virtual ground where ...

Hi, so I do have -4.5 volt between ground pin of LM78L05 so pin 2 is shorting to the virtual ground. so I reflowed the solder connections and checked the continuity and wiring. The rest of the unit fu ...

Hi Grumble, I measured the points and you are absolutely correct I am getting
9v the full voltage between bat negative and pin 3 as well as 4.5v between virtual ground as well as 4.5v at ground pin ...

Thank you, Grumble I will measure those voltages and report back my findings.
Much appreciated

Hi All,
I'm having trouble with a newly finished MFOS Echo Rocket. I'm hoping someone here who can shed a little light on this as I am stumped. The problem is there is no echo at all I've check and d ...

Author	Message
Topic: Echo Rocket problem
Escape Pod Replies: 12 Views: 9523	Posted: Sat Nov 25, 2017 10:03 pm Subject: Echo Rocket problem Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Escape Pod Replies: 12 Views: 9523	Thank you I checked it And there is 5 volt between neg bat pin and pin 1 of 78L05 so the problem lies elsewhere in the circuit. The search continues. Thank you for helping me resolve this part of my ...
Topic: Echo Rocket problem
Escape Pod Replies: 12 Views: 9523	Posted: Tue Nov 21, 2017 2:30 pm Subject: Echo Rocket problem Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Escape Pod Replies: 12 Views: 9523	Understood I will try to be more clear. I measured -4.5 v between r64 and r65 the virtual ground and pin 2 of the 78L05 if there should be no connection between pin 2 of 78L05 and virtual ground where ...
Topic: Echo Rocket problem
Escape Pod Replies: 12 Views: 9523	Posted: Mon Nov 20, 2017 8:10 pm Subject: Echo Rocket problem Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Escape Pod Replies: 12 Views: 9523	Hi, so I do have -4.5 volt between ground pin of LM78L05 so pin 2 is shorting to the virtual ground. so I reflowed the solder connections and checked the continuity and wiring. The rest of the unit fu ...
Topic: Echo Rocket problem
Escape Pod Replies: 12 Views: 9523	Posted: Sat Nov 18, 2017 11:07 pm Subject: Echo Rocket problem Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Escape Pod Replies: 12 Views: 9523	Hi Grumble, I measured the points and you are absolutely correct I am getting 9v the full voltage between bat negative and pin 3 as well as 4.5v between virtual ground as well as 4.5v at ground pin ...
Topic: Echo Rocket problem
Escape Pod Replies: 12 Views: 9523	Posted: Fri Nov 17, 2017 10:21 pm Subject: Echo Rocket problem Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Escape Pod Replies: 12 Views: 9523	Thank you, Grumble I will measure those voltages and report back my findings. Much appreciated
Topic: Echo Rocket problem
Escape Pod Replies: 12 Views: 9523	Posted: Thu Nov 16, 2017 10:56 pm Subject: Echo Rocket problem Subject description: 78L05 not regulating Forum: DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Escape Pod Replies: 12 Views: 9523	Hi All, I'm having trouble with a newly finished MFOS Echo Rocket. I'm hoping someone here who can shed a little light on this as I am stumped. The problem is there is no echo at all I've check and d ...