Latest threads in Hobby Electronics Basicsshow only best voted threads
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Compact Fluorescent Lamp
When you turn the CFL on, It will take about 40 sec brighten fully , which make it very inconvenient to use. Can any members help me to explain this phenomenon ? Thank You. Regards
49
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15 years ago
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49 | |
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Constructing a "delay" into a system?
OK I can solder, and 50 years ago took an RCA Electronics course so I could fix b&w TV's. Since then, not too much electronical has happened around me! I now fly some lightweight, foam Radio...
4
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15 years ago
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4 | |
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Scope dilema
I am looking to purchase my first oscilloscope use from eBay. I have seen many recommendations for the Tektronix 465 series of analog scopes. I have also seen several 100 Mhz Tektronix digital storage...
6
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15 years ago
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6 | |
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PIC16F88 swaping bit status in PORTB
Hello every one! I have a microcontroler PIC16F88. I want to make some simple applications with it, but for some applications I need to swap the value of one bit in one of two ports (PORTA or PORTB)....
3
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15 years ago
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help reading a datasheet
Hi, I am looking at digikey web site the IRFZ44 TO-220AB, there are many chips available. I am a bit confuse concerning the resistance Vs Watt coloumn. I Will take two randomly the IRFZ44VZ-ND WITH...
20
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15 years ago
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20 | |
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DC motor speed control
hi This is muralidhar.i am planing to create an electrical bike for that i am planing to use a dc motor (12V) but i don't no how to control the speed of that motor since it is a DC supply i cant use...
7
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15 years ago
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7 | |
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Powering a Fluke multimeter from a Constant Power Supply
Hi, I work for a software company and recently we have had to start doing some electronics testing in relation to our software. The problem we are running into is that we have these mid-grade (~ $500)...
13
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15 years ago
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13 | |
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"The Public Record Is Your Friend"
If you are saintly like me then the public record is your friend. On the other hand, if you are a delusional liar, then the public record is your enemy. Bret Cahill
18
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15 years ago
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18 | |
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Simple Battery Tester?
Does anyone know if someone makes a cheap battery tester that simply holds the battery, puts a light load on it and assumes you own a DVM to measure the voltage?
2
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15 years ago
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2 | |
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Open source FDTD electromagnetic simulation codes in Java now available
Mark 2 of the Java codes is now available on the Google Group FDTD-OS
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15 years ago
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Sign of Genius
"When a true genius appears in the world, you may know him by this sign, that the dunces are all in confederacy against him." -- Jonathan Swift
109
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15 years ago
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109 | |
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relay switching speed
hello, I am trying to figure out is there is any rating on the maximum switching speed on mechanical relays such as the R3-24AC or 50-094-0 (or just any mechanical relay) I want to use dc current on...
10
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15 years ago
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10 | |
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which group for NIR video capture discussion?
Hello, I am playing around with a bullet camera which grabs video in daylight and in darkness. In darkness it uses NIR LEDs to see the scene and captures B/W video. Can somebody suggest a newsgroup or...
2
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15 years ago
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2 | |
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pwm need to increase frequency
I have built the PWM circuit located here, triangle osc. frequency is about 150 hz. I want to increase it to about 15 khz. When I changed the capacitor, C1 and resistor, R1 the waveform got very...
5
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15 years ago
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Electrolytic and Tantalum Capacitor Life?
Capacitor specs seem a little confusing about expected lifetimes. It seems to depend on various factors of temperature, current, frequency, etc. Just as a general rule, how many continuous hours of...
2
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15 years ago
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