[volt-nuts] Keithley 2001 Multimeter Fault
scrimgap at blueyonder.co.uk
Sun Mar 7 08:50:00 UTC 2010
Good idea, thanks, I'll check.
----- Original Message -----
From: "Mark Sims" <holrum at hotmail.com>
To: <volt-nuts at febo.com>
Sent: Sunday, March 07, 2010 4:50 AM
Subject: [volt-nuts] Keithley 2001 Multimeter Fault
Check the input voltage to the regulator. If it is over 7V then you can use
a normal 3 terminal regulator (7805, LM340, etc). The LM1086 has a bit less
dropout than these.
I have seen lots of designs where LDO regulators were used when the input
voltage was high enough for a regular regulator.
I hadn't realised the LM2940CT-5 was so dependant on the output capacitor
capacitance and ESR for stability until I tested one just now. Can anyone
recommend an upgrade?
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