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a good diode that have 2-2.5V drop?
Hi, I have a bunch of bi-color LEDs. These are jumbo 5mm T1-3/4 3 lead LED with white diffused lens lights up bright red or bright green. Made by Everlight these feature a common...
Monday, 5 April 2010 - 01:05
A bit of a dilema using the MOSI pin for programming for PWM
Hi, I am using the ATTINY24. And PIN7 is as below. It supports MOSI and OC1A and others. (PCINT6/OC1A/SDA/MOSI/DI/ADC6) PA6. Here is my problem. My prototype has necessary...
Monday, 29 March 2010 - 06:27
best/compact bootloader for atmega and attinies for avr-gcc?
preferably with usb interface. thx
Wednesday, 24 March 2010 - 18:48
Executing the RESET vector programmatically. How?
I can do the below void (*ptrToFunction)(); // pointer to a function ptrToFunction = RESET_VECTOR; (*ptrToFunction)(); // reset! where is RESET VECTOR defined in AVR-GCC? Note...
Thursday, 18 March 2010 - 04:22
Is 1Mhz fast enough to do FAST PWM?
Hi, I am able to successful produce sounds with fast PWM with 16Mhz speed. But can't seem to do it with 1Mhz. Is 1Mhz fast enough or must be at least 8Mhz?
Wednesday, 24 February 2010 - 05:38
Interested in doing a simple voltmeter with 7-segment LEDs
Hi, I know how to measure voltage, via the ADC. But how does one measure [software wise, using an ATMEGA8] the current or the ohm? What kind of wiring [not the 7-segment LEDs...
Monday, 15 February 2010 - 17:51
MC34063 DC-DC Step Up/Down IC question
Hi, This is quite an old chip. Rather use MCP1400, but, I can't get one from anywhere. Mouser.com has it, but you have to buy 1500 pcs, not single pieces. So, I am thinking of...
Monday, 15 February 2010 - 08:56
What's the max current an AVR can take?
Hi, For example, ATMEGA8? In general, AVR can take up to 50mA? I see the ATMEGA88-20PU spec. It says: "“ Active Mode: 250 μA at 1 MHz, 1.8V 15 μA at 32 kHz, 1.8V (including...
Monday, 15 February 2010 - 08:18
Amplify those cellphone/small speakers. How
Hi, I am able to amplify an 8ohm, 1.5" cone diameter speaker and the sound output sounds nice and loud enough. But with the cellphone/small speakers (1/2" in diameter), it's not...
Thursday, 11 February 2010 - 04:15
differences between SOIC-16 and SOP-16 format?
Hi, I have been looking at the pins of the HC595 in SOIC-16 and SO-16 formats. They practically physically look the same. I know that the IO pins are the same, of course. I am...
Wednesday, 10 February 2010 - 06:02
avr-gcc auto assigns to zero for decl like 'uint8_t i'
Hi, Will avr-gcc auto assign zero value to declarations like below? static uint8_t i; static volatile uint8_t j; uint8_t k; Thanks.
Sunday, 7 February 2010 - 21:50
circuit that can draw power from USB OR batteries
Hi, I know how to construct either USB or battery circuit to power my load. My question here is: I want to incorporate both power sources but be able to detect to use the USB...
Sunday, 24 January 2010 - 16:58