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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Thanks for the reply. I built the CD4011 circuit and it works great when my supply voltage is between 3.5v and 6.4v. But as soon as I go above 6.5, the unit shuts off, and if I try to power it back up, the display flashes momentarily.
I'm needing this thing to work between 4v and 7.5v...
Here is the situation I've run into. I have a device that had a voltage regulator that didnt work to well. There for I switched to a diffrent regulator, and it seems to work really well. But when I built the prototype power supply, I ran into a little issue.
The insturment uses a single...
Sry if I may seem confusing. I'm a programer thats been pulled into troubleshooting hardware. I know just enough to get by.
Here is what I know I need.
Vin wil be 7.5 to 0 (5 AA batterys)
Vout to be 3.3v (need this to be stable or it throws the calibration of the inst. off)
I'm...
Just checked. I draw about 250ma max. So I'd say 300ma is at least what I need. I'm having major trouble finding one that that is just a step down with PGI/PGO Low batt comparator.
What would anyone recommend?
Not for sure, I will check the bear minumum tomorrow morning. I beleive the 1672 say 350ma max. I will be turning a small motor, so I will say at least 300ma. I've got to be careful not to have the voltage drop when the motor rotates. Again I will get some numbers tomorrow.
I have a MAX1672 Step-up/down regulator. It is preset to regulate at 3.3v. Now the issue is when Vin is dropped below 5.1v, Vout will increase to 3.45v. I'm really needing the regulator to regulate at 3.3v with a MIN Vin of 4v due to a sensitive Vref thats getting pulled off the 3.3v rail...
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