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This is a custom TQFP socket breakout board that I made specifically for programming chips before soldering them onto the board. This helps identify bad chips.
I also can breadboard the entire project before I make the board to ensure the schematic is correct.
My custom AVR board for hacking. Supports mechatronics with ULN2803, L293D half-bridges, and/or power FETs, plus analog inputs, serial I/O, and Zigbee. All AVR I/O pins are accessible through at least one pad.
The PCBs for SelWX have arrived! I don't have the parts on hand to start soldering them yet, and not much time due to work, but... soon!
Our recent order of CGS synth pcbs - master dividers, vcos, lfos, filters, vcas - in fact, pcbs for two complete synths!
Shown on a gutted and still gorgeous black and blue "KUDOS" brand mixer. She will serve as the housing for an insane controller one day, and her parts (oo-er) will grace the innards of the CGS build as well.
Seen Here: The PCB about to get assembled.
So, today my PCB for the LED matrix arrived from BatchPCB! For what I paid, the PCB arrived fairly quickly - I ordered it on the 15/02 I believe, and it arrived 11/03 -- 26 days, which is pretty good (they state 19 business days).
The quality is very, very impressive - far better than anything I could pull off at home. The silkscreen and soldermask makes it look really nice, too.
Soldering it was a joy, although there was a LOT to solder and it's all surface mounted.
I had a few problems at first; it wasn't lighting the matrix at all properly but I soon realised with my new design (transistors on the cathodes) I have to write the transistors HIGH to get a LOW on the cathode, so a quick line of code changed to get that working.
Then for some reason the top half of every letter was flipped. It turns out this was my fault: I messed up when making the package for the LED matrix in Eagle, swapping the matrix's 5th cathode for my system's 8th, 6th for 7th, 7th for 6th and 8th for 5th. This was fairly easy to fix in code, however.
Finally USB isn't working to program or communicate, but I can configure the FT232RL chip (after all, it's sending the clock pulse that's driving my ATmega168). I think I have an idea of what's causing this, but I'm not sure yet.
A collection of boards from the tinyCopter project. More information at my blog: www.qwertyboydesign.wordpress.com
Seen Here: The PCB assembled: Hello, World!
So, today my PCB for the LED matrix arrived from BatchPCB! For what I paid, the PCB arrived fairly quickly - I ordered it on the 15/02 I believe, and it arrived 11/03 -- 26 days, which is pretty good (they state 19 business days).
The quality is very, very impressive - far better than anything I could pull off at home. The silkscreen and soldermask makes it look really nice, too.
Soldering it was a joy, although there was a LOT to solder and it's all surface mounted.
I had a few problems at first; it wasn't lighting the matrix at all properly but I soon realised with my new design (transistors on the cathodes) I have to write the transistors HIGH to get a LOW on the cathode, so a quick line of code changed to get that working.
Then for some reason the top half of every letter was flipped. It turns out this was my fault: I messed up when making the package for the LED matrix in Eagle, swapping the matrix's 5th cathode for my system's 8th, 6th for 7th, 7th for 6th and 8th for 5th. This was fairly easy to fix in code, however.
Finally USB isn't working to program or communicate, but I can configure the FT232RL chip (after all, it's sending the clock pulse that's driving my ATmega168). I think I have an idea of what's causing this, but I'm not sure yet.
Seen Here: The PCB out of the bag! (Reverse side)
So, today my PCB for the LED matrix arrived from BatchPCB! For what I paid, the PCB arrived fairly quickly - I ordered it on the 15/02 I believe, and it arrived 11/03 -- 26 days, which is pretty good (they state 19 business days).
The quality is very, very impressive - far better than anything I could pull off at home. The silkscreen and soldermask makes it look really nice, too.
Soldering it was a joy, although there was a LOT to solder and it's all surface mounted.
I had a few problems at first; it wasn't lighting the matrix at all properly but I soon realised with my new design (transistors on the cathodes) I have to write the transistors HIGH to get a LOW on the cathode, so a quick line of code changed to get that working.
Then for some reason the top half of every letter was flipped. It turns out this was my fault: I messed up when making the package for the LED matrix in Eagle, swapping the matrix's 5th cathode for my system's 8th, 6th for 7th, 7th for 6th and 8th for 5th. This was fairly easy to fix in code, however.
Finally USB isn't working to program or communicate, but I can configure the FT232RL chip (after all, it's sending the clock pulse that's driving my ATmega168). I think I have an idea of what's causing this, but I'm not sure yet.
High power led controller for 4 groeps. The high power mode is 700 mA (adjustable, there are Always 2 leds in serie), the continue power mode begins to decrease after 27 ms until 350 mA is reached. Each group has its own timing (via the FPGA controller). For higher power applications, 1000 mA @ 1ms, duty cycle 1/10 is allowed. This depends on the type of LEDs. This circuit board can be adapted for any power surge. Large capacitors are only needed if you need long high current. The 2 LED + resistor 2R2 give a voltage drop of 7.35V at 350 mA.
New Atmega328p controller design. More I/O's onboard, low cost, high performance.
- LCD display.
- 6 Leds output for front plate.
- 2 x 8 key inputs
- DCF77 connection.
- RFM12B wireless controller onboard.
- Battery boader onboard.
- ISP connector for programming.
- Buzzer for alarm.
-A few spare I/O's for expansion.
Seen Here: The PCB out of the bag!
So, today my PCB for the LED matrix arrived from BatchPCB! For what I paid, the PCB arrived fairly quickly - I ordered it on the 15/02 I believe, and it arrived 11/03 -- 26 days, which is pretty good (they state 19 business days).
The quality is very, very impressive - far better than anything I could pull off at home. The silkscreen and soldermask makes it look really nice, too.
Soldering it was a joy, although there was a LOT to solder and it's all surface mounted.
I had a few problems at first; it wasn't lighting the matrix at all properly but I soon realised with my new design (transistors on the cathodes) I have to write the transistors HIGH to get a LOW on the cathode, so a quick line of code changed to get that working.
Then for some reason the top half of every letter was flipped. It turns out this was my fault: I messed up when making the package for the LED matrix in Eagle, swapping the matrix's 5th cathode for my system's 8th, 6th for 7th, 7th for 6th and 8th for 5th. This was fairly easy to fix in code, however.
Finally USB isn't working to program or communicate, but I can configure the FT232RL chip (after all, it's sending the clock pulse that's driving my ATmega168). I think I have an idea of what's causing this, but I'm not sure yet.
Tried Laen's home etching test dorkbotpdx.org/blog/laen/adventures_in_etching_the_test_p...
1200dpi laser printer -> 112gsm tracing paper -> presensitized FPC-16 -> silicate developer -> Hot ferric chloride + bubbler
The 8mil track is fine, I'm happy with that.
If anyone can do better with similar equipment, I'd love to find out how...