| The Shop > Electronics & IC Programing |
| Digital oscilloscope project/kit |
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| kayzed1:
Tis the second board io have on these, if you want it PM me your address... Lyn. |
| RobWilson:
The Signal generator project arrived from Banggood yesterday , so I welded all the bits together today :zap: Cant test it until I build a power supply for it :coffee: , also the PSU circuit diagram I posted earlier has a couple of faults :Doh: #1 the supply needs to be more like +18 - 18 volts as a 12 regulator needs more than 12 volts #2 the -12 rail needs a 7912 voltage regulator not a 7812 ,the 7912 is a -12v reg . Cheers Rob |
| RobWilson:
Going to cobble together something like this :zap: :zap: Rob :coffee: |
| John Rudd:
Rob, Nicely assembled... :clap: Looks pretty neat and tidy....Hope it works for you..... :zap: Just be aware that the pin outs for 78 and 79 v regs are different....... The + 12v reg may need a heatsink on it too as its supplying current for the 9 & 5 v regs.... |
| RobWilson:
--- Quote from: John Rudd on December 30, 2015, 12:43:57 PM ---Rob, Nicely assembled... :clap: Looks pretty neat and tidy....Hope it works for you..... :zap: Just be aware that the pin outs for 78 and 79 v regs are different....... The + 12v reg may need a heatsink on it too as its supplying current for the 9 & 5 v regs.... --- End quote --- Cheers John , if you see the northern lights tis just me going up in smoke :lol: The reg pinout got me on the simulation ,,,,,,,,,,was wondering why I was getting -18v when it should have been -12 v ,,,,,,,,,,,,,,had the 7912 wired wrong :palm: I have ordered heatsinks for all the regs :thumbup: anything else you or anyone could recommend to improve things ? :wave: Cheers Rob |
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