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Okay thank you!
I am looking for this diode: https://www.oup.com/us/pdf/microcircuits/students/zandr/1N5235.pdf
unfortunately I cant find the graph of the current. How can I find the minimun current for this diode?
Hi Rick,
thank you for your reply. The problem is that I want to use the same circuit for both 12V and 24V sensors.
I want thinking about something like
with a 3.3V zener diode.
This kind of photocell:
I want to connect a photocell with a 12V output or a 24V output. What kind of interface is capable of downconvert 12V or 24V to 3.3V?
Hi,
I want to make an interface for a microcontroller that is capable of connecting 12V to 24V photocells. The trick is that the microcontroller need 3.3V.
How can I downconverter the 12V or 24V to 3.3V?
Thank you for your reply. I've tried to calculate it with the calculations from the link, but I cant get the hang of it.
I'm a littble bit confused by the voltage across the zener-diode
Hi,
I've build this schematic:
I have choosed the C and the R empirical. I have now about 5K resistor and a 10nF C. This give me a 10kHz frequency.
On the website where I found the schematic they use the following formula to calculate the frequency...
I use the MCP1700T-5002. It can deliver 250mA at 5V. I need about 150mA.
datasheet: **broken link removed**
Inputrange: 6V (max. 6.5V)
Output: 5V
I'm using this voltage regulator because this one has a very low drop-out voltage.
How can I protect it for higher voltages at the input? For...
Hi all,
I want to make 5V. I'm using a voltage regulator with a Vin-max = 6V and Vdropout = 0,4V.
How can I protect the regulator for higher voltages than 6V?
For example, can I use a 5V6 zener diode to protect the vreg?
Hi all,
I want to make a negative 5V. I want to do that with a DCDC-converter.
Datasheet: http://www.murata-ps.com/data/power/ncl/kdc_mea.pdf
I've made a schematic. Is this going to work?
**broken link removed**
Any recommendations?
Tomorrow I'm going to build the circuit that Goldsmith posted. I have a last question.
The pspice simulations show that the signal is from 0V to 10V. How can I arrange that the signal is from -10V to +10V?
I tried making a sawtooth with a 555. It works below 2khz. When I go higher the output signal dissapears.
Thank you.
I think this one is a good starting point.
http://www.edn.com/article/521198-Simple_sawtooth_generator_operates_at_high_frequency.php
What are suitable values for R and C...
Thank you for the insight!
So for example, I can use this circuit to create my BPF with LC-tank ?
and then put an buffer/voltage follower at the output of the filter. The challenge is to couple the tanks to the main oscillator to keep them in tune?
Another question. You say that I need an LC...
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