Title: NTE834 comparator output voltage Post by: ka1tdq on September 19, 2018, 09:42:54 AM I'm using the NTE834 comparator chip for something, but the positive output voltage is 1.7 vdc when it switches and I'm wanting 5 vdc. I have a 5 vdc supply to the ship and ground is connected to -VCC. It is switching properly, because when the input to the (-) pin is 5 vdc the output goes to zero. 2.5 vdc is my reference voltage to the (+) pin. It is configured as an inverting comparator.
I need the output to drive other TTL logic, so I need 5 volts output. Datasheet is attached. Jon Title: Re: NTE834 comparator output voltage Post by: ka1tdq on September 19, 2018, 10:34:37 AM I think I found my answer. I need a pull-up resistor on the output.
Jon Title: Re: NTE834 comparator output voltage Post by: ka1tdq on September 21, 2018, 11:04:42 AM Just for ha-ha’s, here’s the finished product. I also needed pull-up resistors on the buffer chip right before the FETs. It’s a logic board for something at work. An Arduino or a Raspberry Pi would’ve been more elegant, but this requires no programming.
Jon Title: Re: NTE834 comparator output voltage Post by: W2PFY on September 22, 2018, 03:21:01 PM Kewl!!! Do you have a larger picture of your avatar? Inquiring minds need to see :D :D :D
Title: Re: NTE834 comparator output voltage Post by: ka1tdq on September 22, 2018, 04:20:08 PM Here
Title: Re: NTE834 comparator output voltage Post by: w4bfs on September 22, 2018, 05:51:31 PM gives a whole new meaning to the term busted .... nice Jon, I'll bet you go peacefully
Title: Re: NTE834 comparator output voltage Post by: ka1tdq on September 22, 2018, 07:35:47 PM Being a ham is sexy. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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