Latest threads in Electronics Designshow only best voted threads
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Sniffing out IR remote control codes with a PC
Hi, I seem to remember seeing a simple circuit for connection to a PC's RS232 port and software (DOS/Windows) for sniffing out the codes being transmitted by IR remote control handsets. FWIW I'm only...
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19 years ago
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1% colour codes
In all the years in this hobby, I suppose this is the first time I've had to look closely at resistor colour codes. My latest parts order included a few .125W 1% resistors. With glasses removed and...
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19 years ago
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AD822, good TL062 replacement?
Just bumped into it looking for quieter alternatives to the ubiquitous TL062 for a battery powered bass guitar tone circuit. Ok, power consumption is higher, but still much lower than the usual audio...
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19 years ago
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which component has exponential i-v characteristics down to 1 pA?
Looking for a circuit element that is pretty exponential in i-v down to about 1pA. Maybe even 10pA. Starting from maybe 10nA. Trying to simulate a vacuum tunnel junction for STM. I know a lot of stuff...
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19 years ago
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2.45GHz RFID reader
Hi, all: I'm going to design a 2.45GHz RFID reader. Are there any IC chips available? Can anyone give me some informations and suggestions? Thanks alot X.Y Yang
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19 years ago
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27 | |
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positve and negative power supply
im building a circuit using the 4052 cmos chip. i need to connect the 4052 Vee to at least as negative as -4V for audio reasons. it cant be at 0 for my purposes. i would like the unit to fit into the...
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19 years ago
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Re: Small VCO?
Belated followup: Thanks for the DDS idea John. I ended up shifting some I/O around and bit-banged the SPI interface to an AD9833 - works great! Bob
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19 years ago
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SDRAM Concurrent auto precharge
I see that Micron SDRAMs are claimed to support Concurrent auto precharge. Is this a common feature amongst SDRAMs? I'm using a sample of a ICSI SDRAM at present and this feature isn't mentioned in...
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19 years ago
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transimpeadance vs voltage amp for photodiode
I am working on an amplifier circuit for a avalanche photodiode that is looking at very high speed 2 nsec rise 10nsec wide pulses. Previous work had been done on a circuit that uses 2 TI OPA695 X8...
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19 years ago
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Refreshing SDRAMs?
In the past I'm sure I've used a SDRAM and relied upon "Activating" and "auto-precharging" every page (ie set by row and bank address) within the 64ms refresh period to ensure that all used elements...
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19 years ago
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A resistor at 150°C...how?
Hi all, I have to buil a circuit to use a resistor as a heater; what I want is to use this resistor to heat a surface at 150 °C. My first problem is to choose right resistor(I have ONLY 15 mm...
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19 years ago
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Nixie ring counter?
There's a rumor going around that you can hook up a few resistors, capacitors, and diodes to a Nixie tube and get it to count. No extra chips, transistors, SCR's, or other 4-layer thingies. Now I...
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19 years ago
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Sigma Deltas
Hello, I have a couple of questions regarding Sigma Deltas again. From what I understand the simplest digital filter available for the sigma delta is the counter. That is you count the number of times...
7
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19 years ago
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Solder like glue ?
That means solder which likes glue. When i squeeze the "solder glue" on the joint, it will be dried in few seconds and the components are fixed on the motherboard. Of course the "solder glue" is...
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19 years ago
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buck stepdown chips
Hi, I am looking for some high frequency (1MHz+) step down buck switcher chips that can handle an input voltage of at least 7.4V and at least 500mA output current. The Texas Instruments TPS623xx...
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19 years ago
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