| T O P I C R E V I E W |
| gus_boy |
Posted - Jul 23 2007 : 12:34:57 AM
Greetings:
I have a couple of old circuit boards from my son's ray guns (circa mid-80's). Over time the leads to battery, LED, speaker and operating switch input/outputs have been shorn away. Could anyone offer assistance in returning these articles to service? They're identified as "54-10012A" and are of simple construction - no DIPs, just resistors, capacitors, transistors and one 12-position rotary switch to change the sound effect. Any guidance would be greatly appreciated.
Thanks
gus_boy |
| 4 L A T E S T R E P L I E S (Newest First) |
| gus_boy |
Posted - Aug 12 2007 : 3:59:52 PM
Aaron: thanks for the hints. This project has to go on hold for the moment, but as soon as I get back to it I'll post any progress. |
| Aaron Cake |
Posted - Aug 10 2007 : 11:27:12 AM
The ground plane will be easy to figure out. It's going to be a common trace that runs around the circuit, probably connects to one side of the speaker directly, and has a lot of components negative sides connected to it. The +V line is similar except that it likely connects directly to the transistor that drives the speaker and maybe the power "trigger". From there you may be able to probe the other outputs. |
| gus_boy |
Posted - Aug 04 2007 : 2:35:37 PM
Right - I should have been more specific: I need the locations for the specific connections. There's some info silk-screened on one of the boards (I have 2 identical units) but even at only 9 v. I could probably do some damage if I put power to the wrong spot on the board. |
| Aaron Cake |
Posted - Jul 25 2007 : 4:42:50 PM
Do you just need to resolder the wires, or are you trying to figure out where to connect them? |
