| The Shop > Electronics & IC Programing |
| Digital oscilloscope project/kit |
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| shipto:
Mine lives :ddb: 2 pics one with the self generated signal and the second with the signal generated by my other oscilloscope. sen1 switch is a little temperamental it needs jiggling a little to work properly but I will live with that. |
| John Rudd:
In answer to Rob's question on the 0-30 v power supply.... Any one cinsidering building this, my recommendation fwiw .......http://www.ti.com/lit/ds/symlink/opa445.pdf These op amps have a better survival rate at 43v than the orig TLO81's originally specified..... |
| RobWilson:
Cheers John :thumbup: , I may getting a few for the PSU kit . Nice one Shipto :clap: :clap: good to see another up and running , do you or has anyone else who has built one of these DSO have any thoughts on a case ? Cheers Rob |
| John Swift:
well I've a bag of bits for the scope ordered not decided if I should mount the capacitors and wire ended resistors on the back of the board so the display will fit closer to the main PCB or mount the switches on spacers of some kind to bring them up to the level of the display John |
| kayzed1:
Well mine got the last blob of weld today, i found a PU in the draw that did 2V-6v-9v and 12volts so i used that to do the tests.. All worked as it should :bugeye: fitted the LCD and fired it up....we have light and pictures :clap: THEN!!! the trace went off, the rest of the screen is still lit up and all symbols are present. So i followed the trouble shooting giude and came up with two voltage errors.. L1 should be Neg 8.11volts but ut is high at 11.57 volts. TP25 should be neg 8.08volts but it to is high at 11.56volts. i have checked all the resistors and all are in the correct places...any thoughts? Lyn. |
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