Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [icl7660]

6 questions
3
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1 answer

Negative voltage PWM?

I'm relatively new to EE, sorry if this is newbie territory. With an Arduino, I am trying to emulate a device that outputs NEGATIVE 3.3v PWM (0V or -3.3V, square wave) at around 500 hz. Obviously, the PWM out of an arduino is 0V or +5V (or +3.3v…
DrJustice
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Can I use MAX232 instead of a ICL7660 to make a split power supply?

For an opAmp rails I need positive and negative voltages i.e. Vcc, Vee. I look for a good IC which is commonly used for creating split power from a single power supply. Many recommends ICL7660. I currently have a MAX232. Can it be used instead? I…
user16307
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2 answers

Charge Pump 9v to 15v?

I need to power a device (it's an analog bucket brigade delay) from a 9v power supply or battery. The device takes 15v. Is there anyway? I have a few 7660s IC chips, if that helps. I've made charge pumps before but they were integrated into another…
TCassa
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Package impact on ICL7660

I am using the ICL7660 charge pump IC to generate a -5V supply from a +5V. When using the IC on breadboard with a DIP package (ICL7660CPAZ), with two 10µF electrolytic capacitors, it works perfectly fine. However, when I change the chip in the…
Edesign
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2 answers

Why use a different circuit to create a positive voltage with the ICL7660, rather than running it “upside-down”?

The primary use of the ICL7660 (and it’s many clones/alternatives) is to create a “negative voltage” equal to its input voltage, which it does with minimal external components. However, in my application I’d like to create a voltage above a power…
Harry Brooke
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2 answers

Dual power supply for Op Amp

We have dual power supply units (+- 12V DC with common GND) at our college lab using which I am able to implement my project (digital thermometer) which uses op amps as shown in the figure. I'm using an LM35, three op amps, an Arduino Uno, and an…
Navin Sridhar
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