http://www.dipmicro.com/support/ Sun, 14 Mar 2010 15:46:21 -0400 MyBB http://www.dipmicro.com/support/showthread.php?tid=121 Sat, 27 Feb 2010 04:15:26 -0500 JimNarem http://www.dipmicro.com/support/showthread.php?tid=121 don't actually use the boards. Your PB1 is really good and I'd like to make some
suggestions for improvement.

I like the symmetry of the PB1, I've used the PB4 (seems discontinued) and it was
asymmetric and the top was unlabeled due to plated through holes. You have to be
careful in layout with the PB4 since tiepoints off of the chip pads differ on the left
and right sides.

I like the edge tiepoints of the PB1, it allows you to have two row headers on the
edge of the board (for jtag/avr ports). The extra pwr buses on both sides of the
PB4 made it hard to use dual row headers since that row couldn't have DIPs or
SOICs across from the headers. I don't think the plated through holes are necessary.

The real problem with the PB1 is, of course, the size. It fills up fast. Now I realize
it's sized for some sort of mounting rail, but that size is just too small and the
rails are expensive and they really didn't catch on.

I've also used the SparkFun boards, they have a series Kangaroo, Diprotodon, etc
that are 80mmx100mm (fractional eurocard). It's a nice size, but totally braindead
to actually use since there are NO interconnected pads! WTF! You have to spot
solder jumper wires and make solder bridges. PITA!

So my suggestion is to make a PB1 style double wide in the 80x100 format. That
gives (on .1 centers) 30x38 holes. The easy way to lay out the board is to stick
two extended (30 holes long) PB1s side by side. Maybe some sort of horizontal
bus to tie the two vertical buses together, maybe room for power header & cap.

Even better might be to extend the PB1 to 38 holes long, then stick them together
eliminating some of the stuff in the middle. A brief bit of dorking with two PB1s
shows that to fit two columns 30 wide eliminates the PQR and ABC columns.
The QR and AB columns aren't really necessary in the middle of the board and
chopping the P and C columns only changes the SMT interconnection count.

Since you're selling the PB1 for about $1, the 80x100 size should be around $3.
SparkFun sells their bare (no usb/serial) for $10 and it's useless! Anyway,
thanks for listening.

And while I have your attention, maybe a few other rants on proto boards.

It might be nice if the ET-PCB TQFP44 could be mounted without shorting it out.
Or even better the digole CN337. It's really tough to use those TQFPs, the
only board I like is the vertical one sold by ebayer microinventor. Your LQFP48
board is nice with all the proto room, but face it, more interesting stuff is in
TQFP32 and TQFP44 form.]]> don't actually use the boards. Your PB1 is really good and I'd like to make some
suggestions for improvement.

I like the symmetry of the PB1, I've used the PB4 (seems discontinued) and it was
asymmetric and the top was unlabeled due to plated through holes. You have to be
careful in layout with the PB4 since tiepoints off of the chip pads differ on the left
and right sides.

I like the edge tiepoints of the PB1, it allows you to have two row headers on the
edge of the board (for jtag/avr ports). The extra pwr buses on both sides of the
PB4 made it hard to use dual row headers since that row couldn't have DIPs or
SOICs across from the headers. I don't think the plated through holes are necessary.

The real problem with the PB1 is, of course, the size. It fills up fast. Now I realize
it's sized for some sort of mounting rail, but that size is just too small and the
rails are expensive and they really didn't catch on.

I've also used the SparkFun boards, they have a series Kangaroo, Diprotodon, etc
that are 80mmx100mm (fractional eurocard). It's a nice size, but totally braindead
to actually use since there are NO interconnected pads! WTF! You have to spot
solder jumper wires and make solder bridges. PITA!

So my suggestion is to make a PB1 style double wide in the 80x100 format. That
gives (on .1 centers) 30x38 holes. The easy way to lay out the board is to stick
two extended (30 holes long) PB1s side by side. Maybe some sort of horizontal
bus to tie the two vertical buses together, maybe room for power header & cap.

Even better might be to extend the PB1 to 38 holes long, then stick them together
eliminating some of the stuff in the middle. A brief bit of dorking with two PB1s
shows that to fit two columns 30 wide eliminates the PQR and ABC columns.
The QR and AB columns aren't really necessary in the middle of the board and
chopping the P and C columns only changes the SMT interconnection count.

Since you're selling the PB1 for about $1, the 80x100 size should be around $3.
SparkFun sells their bare (no usb/serial) for $10 and it's useless! Anyway,
thanks for listening.

And while I have your attention, maybe a few other rants on proto boards.

It might be nice if the ET-PCB TQFP44 could be mounted without shorting it out.
Or even better the digole CN337. It's really tough to use those TQFPs, the
only board I like is the vertical one sold by ebayer microinventor. Your LQFP48
board is nice with all the proto room, but face it, more interesting stuff is in
TQFP32 and TQFP44 form.]]> http://www.dipmicro.com/support/showthread.php?tid=120 Sat, 20 Feb 2010 08:00:22 -0500 AtomSoft http://www.dipmicro.com/support/showthread.php?tid=120
1x PIC18F4620
1x PIC18F4550
1x dsPIC30F4013

All are 40 PIN Dip.

Shipping is free (for US/CANADA)

These are slightly used.

RETAIL PRICE is approx: $18 + Shipping... Savings of approx... $15

I am also willing to trade almost anything for these. So make a offer and ill consider it.]]>
1x PIC18F4620
1x PIC18F4550
1x dsPIC30F4013

All are 40 PIN Dip.

Shipping is free (for US/CANADA)

These are slightly used.

RETAIL PRICE is approx: $18 + Shipping... Savings of approx... $15

I am also willing to trade almost anything for these. So make a offer and ill consider it.]]> http://www.dipmicro.com/support/showthread.php?tid=119 Sat, 20 Feb 2010 07:54:15 -0500 AtomSoft http://www.dipmicro.com/support/showthread.php?tid=119
http://cgi.ebay.com/ws/eBayISAPI.dll?Vie...:MESELX:IT

Shipping is free (for US/CANADA).

These are slightly used as you can see from eBay listing...


UPDATE!!!:

SOLD!!]]>
http://cgi.ebay.com/ws/eBayISAPI.dll?Vie...:MESELX:IT

Shipping is free (for US/CANADA).

These are slightly used as you can see from eBay listing...


UPDATE!!!:

SOLD!!]]> http://www.dipmicro.com/support/showthread.php?tid=118 Sat, 20 Feb 2010 00:56:22 -0500 admin http://www.dipmicro.com/support/showthread.php?tid=118 2. Selling offers should start subject like FS: (For Sale) or Offer:
3. Buying offers should start subject like WTB: (Want To Buy)
4. Make most descriptive thread subject. If selling components, write P/N in the subject. If you have asking/target price, put it there too.
5. No flooding! If you have too many items, group several similar ones in one thread.
6. dipmicro does not scrutinize offers, please do your due-diligence about your trading partner. This website does not facilitate exchange, payment, escrow, shipping or any other service related to your transaction other than the communication.
7. No links to competing websites and online services. You can have a link to your blog or eBay auction. If you are surplus dealer, you can also use this forum but keep in mind section [5] above, and mainly do not link to your business website.
8. Do not post items not related to electronics, components and tools. Books about electronics, CAD software or related services are allowed, however posting commercial electronics like DVD players is not allowed.

You understand that dipmicro is not liable for any issues related to your transaction communicated via this forum. By using this forum you have agreed to these rules.]]> 2. Selling offers should start subject like FS: (For Sale) or Offer:
3. Buying offers should start subject like WTB: (Want To Buy)
4. Make most descriptive thread subject. If selling components, write P/N in the subject. If you have asking/target price, put it there too.
5. No flooding! If you have too many items, group several similar ones in one thread.
6. dipmicro does not scrutinize offers, please do your due-diligence about your trading partner. This website does not facilitate exchange, payment, escrow, shipping or any other service related to your transaction other than the communication.
7. No links to competing websites and online services. You can have a link to your blog or eBay auction. If you are surplus dealer, you can also use this forum but keep in mind section [5] above, and mainly do not link to your business website.
8. Do not post items not related to electronics, components and tools. Books about electronics, CAD software or related services are allowed, however posting commercial electronics like DVD players is not allowed.

You understand that dipmicro is not liable for any issues related to your transaction communicated via this forum. By using this forum you have agreed to these rules.]]> http://www.dipmicro.com/support/showthread.php?tid=111 Fri, 18 Sep 2009 19:57:02 -0400 internetjim http://www.dipmicro.com/support/showthread.php?tid=111
Anything close?

Thanks]]>
Anything close?

Thanks]]> http://www.dipmicro.com/support/showthread.php?tid=110 Wed, 05 Aug 2009 18:26:20 -0400 chard62 http://www.dipmicro.com/support/showthread.php?tid=110 When I take a new 16f684 and program it, all is well. Then if I try to read it, erase it, or reprogram it, the "device not found" error comes up (using MPLAB IDE v8.10).
If I switch to another 16F684, then it all works again until I try to reprogram it. Could it have something to do with the hex file that is being programmed into it?

Thanks,
Richard]]> When I take a new 16f684 and program it, all is well. Then if I try to read it, erase it, or reprogram it, the "device not found" error comes up (using MPLAB IDE v8.10).
If I switch to another 16F684, then it all works again until I try to reprogram it. Could it have something to do with the hex file that is being programmed into it?

Thanks,
Richard]]> http://www.dipmicro.com/support/showthread.php?tid=109 Wed, 05 Aug 2009 18:16:46 -0400 chard62 http://www.dipmicro.com/support/showthread.php?tid=109
Thx,

Richard]]>
Thx,

Richard]]> http://www.dipmicro.com/support/showthread.php?tid=108 Fri, 27 Feb 2009 23:16:00 -0500 matttail http://www.dipmicro.com/support/showthread.php?tid=108
I was very pleased with your shipping speed, I hope you can help me.

--Matt]]>
I was very pleased with your shipping speed, I hope you can help me.

--Matt]]> http://www.dipmicro.com/support/showthread.php?tid=105 Tue, 02 Dec 2008 13:24:26 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=105
Devices

PIC10F200/PIC10F202, PIC10F204/PIC10F206, PIC10F220/PIC10F222, PIC12F508/PIC12F509, PIC12F510, PIC12F519, PIC12F609/PIC12HV609, PIC12F615/PIC12HV615, PIC12F629, PIC12F635, PIC12F675, PIC12F683, PIC16F54, PIC16F57, PIC16F59, PIC16F84A, PIC16F88, PIC16F506, PIC16F610/PIC16HV610, PIC16F616/PIC16HV616, PIC16F627A/PIC16F628A/PIC16F648A, PIC16F631, PIC16F684, PIC16F687/PIC16F689, PIC16F688, PIC18F24J10/PIC18F25J10, PIC18F44J10/PIC18F45J10, PIC18F248/PIC18F258, PIC18F448/PIC18F458, PIC18F2455/PIC18F2550, PIC18F2585/PIC18F2680]]>
Devices

PIC10F200/PIC10F202, PIC10F204/PIC10F206, PIC10F220/PIC10F222, PIC12F508/PIC12F509, PIC12F510, PIC12F519, PIC12F609/PIC12HV609, PIC12F615/PIC12HV615, PIC12F629, PIC12F635, PIC12F675, PIC12F683, PIC16F54, PIC16F57, PIC16F59, PIC16F84A, PIC16F88, PIC16F506, PIC16F610/PIC16HV610, PIC16F616/PIC16HV616, PIC16F627A/PIC16F628A/PIC16F648A, PIC16F631, PIC16F684, PIC16F687/PIC16F689, PIC16F688, PIC18F24J10/PIC18F25J10, PIC18F44J10/PIC18F45J10, PIC18F248/PIC18F258, PIC18F448/PIC18F458, PIC18F2455/PIC18F2550, PIC18F2585/PIC18F2680]]> http://www.dipmicro.com/support/showthread.php?tid=104 Tue, 02 Dec 2008 13:18:37 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=104
Devices

3MM_LED, 5MM_LED, 5323F5, L934CB/YD, RECTANGULAR]]>
Devices

3MM_LED, 5MM_LED, 5323F5, L934CB/YD, RECTANGULAR]]> http://www.dipmicro.com/support/showthread.php?tid=103 Tue, 02 Dec 2008 11:29:04 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=103
Devices

AS385BN, AS2810AM, AS2815AR, L7805ACV, LE120CD, LM7805, MCP1253T-33X50, TA78DL05AP, TSM101A]]>
Devices

AS385BN, AS2810AM, AS2815AR, L7805ACV, LE120CD, LM7805, MCP1253T-33X50, TA78DL05AP, TSM101A]]> http://www.dipmicro.com/support/showthread.php?tid=102 Tue, 02 Dec 2008 11:26:30 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=102
Devices

1N914, 1N4002, 1N4007, 1N4148, 1N5711, 1N5818]]>
Devices

1N914, 1N4002, 1N4007, 1N4148, 1N5711, 1N5818]]> http://www.dipmicro.com/support/showthread.php?tid=101 Tue, 02 Dec 2008 11:21:09 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=101
Devices

ENC28J60, MCP3002, MCP3202, MCP4922, ST232, X2402]]>
Devices

ENC28J60, MCP3002, MCP3202, MCP4922, ST232, X2402]]> http://www.dipmicro.com/support/showthread.php?tid=100 Tue, 02 Dec 2008 11:15:48 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=100
Devices

74ALS32, 74ALS74, 74ALS153, 74ALS174, 74ALS244, 74ALS373, 74ALS157, 74ALS366, 74ALS367, 74ALS688, 74ALS4020, 74ALS123, 74ALS125, 74ALS137, 74ALS138, 74ALS139, 74ALS240, 74ALS241, 74ALS251, 74ALS374, 74ALS537, 74ALS12, 74ALS15, 74ALS21, 74ALS26, 74ALS30, 74ALS96, 74ALS107, 74ALS107, 74ALS109, 74ALS114, 74ALS126, 74ALS132, 74ALS136, 74ALS153, 74ALS163, 74ALS166, 74ALS175, 74ALS195, 74ALS298, 74ALS365, 74ALS378, 74ALS641]]>
Devices

74ALS32, 74ALS74, 74ALS153, 74ALS174, 74ALS244, 74ALS373, 74ALS157, 74ALS366, 74ALS367, 74ALS688, 74ALS4020, 74ALS123, 74ALS125, 74ALS137, 74ALS138, 74ALS139, 74ALS240, 74ALS241, 74ALS251, 74ALS374, 74ALS537, 74ALS12, 74ALS15, 74ALS21, 74ALS26, 74ALS30, 74ALS96, 74ALS107, 74ALS107, 74ALS109, 74ALS114, 74ALS126, 74ALS132, 74ALS136, 74ALS153, 74ALS163, 74ALS166, 74ALS175, 74ALS195, 74ALS298, 74ALS365, 74ALS378, 74ALS641]]> http://www.dipmicro.com/support/showthread.php?tid=99 Tue, 02 Dec 2008 11:07:31 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=99
Devices

ATMEGA88-20PU]]>
Devices

ATMEGA88-20PU]]> http://www.dipmicro.com/support/showthread.php?tid=98 Tue, 02 Dec 2008 11:01:32 -0500 dipmicro http://www.dipmicro.com/support/showthread.php?tid=98
Devices

4N27, CNY17, H11AA1, LM324N, MC1458, MC33071, NE555N, NE558, TC279IN, TL054IN, TL061CP, TL062CP, TLC279IN, TLV2341ID, UA741CN]]>
Devices

4N27, CNY17, H11AA1, LM324N, MC1458, MC33071, NE555N, NE558, TC279IN, TL054IN, TL061CP, TL062CP, TLC279IN, TLV2341ID, UA741CN]]> http://www.dipmicro.com/support/showthread.php?tid=93 Sun, 20 Jul 2008 00:29:47 -0400 dipmicro http://www.dipmicro.com/support/showthread.php?tid=93
We received batch of 100pcs PICkit2 Clones. Due to miscommunication they had no enclosures. Plus after retesting them, I found out these units do not work as expected due to improperly substituted components.

Here is the original Microchip schematic.

Here is the clone schematic.

Problems with the original units:

1. VDD cannot be regulated lower than 4.5-4.7V, which means if the 3.3V part is programmed in programmer-powered circuit, the part would be possibly damaged.

I found out this issue exists due to rail-rail opamp in Microchip's original being substituted by non-rail-rail type in the clone. We have switched the LM358 for MCP6002 (dual version of MCP6001 used in original).

2. The original uses 680uH/33ohm L1, while clone uses 470uH/4ohm. While inductance is not the issue, I found out that the low DC resistance of L1 causes the V_TGT to drop significantly when VPP_PUMP is activated. I have tried to source the proper inductor, tried several types, but was not too succesfull. Instead we have fixed it by reducing the stimuli to the Q6 by installing an extra resistor between base and emiteur.

I have also tried adding serial resistance to L1 or installing additional stabilising resistor into emiteur. While some of these solutions may be better, they might require cutting traces and is much more difficult to do that than add ezxtra part. Solution with bleeder between Q6 base and emiter seems to be stable enough.

The units are fully tested and we are selling them with reduced price. They come with all accessories, just do not have the plastic enclosure and have been repaired. If you don't mind, this is your chance to get an excellent inexpensive tool.

We have worked with manufacturer and they will be updating the design so the next batch we receive will be fully functional and should be tested by our test procedure.]]>
We received batch of 100pcs PICkit2 Clones. Due to miscommunication they had no enclosures. Plus after retesting them, I found out these units do not work as expected due to improperly substituted components.

Here is the original Microchip schematic.

Here is the clone schematic.

Problems with the original units:

1. VDD cannot be regulated lower than 4.5-4.7V, which means if the 3.3V part is programmed in programmer-powered circuit, the part would be possibly damaged.

I found out this issue exists due to rail-rail opamp in Microchip's original being substituted by non-rail-rail type in the clone. We have switched the LM358 for MCP6002 (dual version of MCP6001 used in original).

2. The original uses 680uH/33ohm L1, while clone uses 470uH/4ohm. While inductance is not the issue, I found out that the low DC resistance of L1 causes the V_TGT to drop significantly when VPP_PUMP is activated. I have tried to source the proper inductor, tried several types, but was not too succesfull. Instead we have fixed it by reducing the stimuli to the Q6 by installing an extra resistor between base and emiteur.

I have also tried adding serial resistance to L1 or installing additional stabilising resistor into emiteur. While some of these solutions may be better, they might require cutting traces and is much more difficult to do that than add ezxtra part. Solution with bleeder between Q6 base and emiter seems to be stable enough.

The units are fully tested and we are selling them with reduced price. They come with all accessories, just do not have the plastic enclosure and have been repaired. If you don't mind, this is your chance to get an excellent inexpensive tool.

We have worked with manufacturer and they will be updating the design so the next batch we receive will be fully functional and should be tested by our test procedure.]]> http://www.dipmicro.com/support/showthread.php?tid=86 Fri, 12 Oct 2007 11:20:42 -0400 dipmicro http://www.dipmicro.com/support/showthread.php?tid=86 http://www.dipmicro.com/support/showthread.php?tid=85 Fri, 12 Oct 2007 11:19:25 -0400 dipmicro http://www.dipmicro.com/support/showthread.php?tid=85 http://www.dipmicro.com/support/showthread.php?tid=21 Sun, 03 Jun 2007 23:55:38 -0400 dipmicro http://www.dipmicro.com/support/showthread.php?tid=21
http://www.electro-tech-online.com/micro...m-icd.html

Conclusion:

The crystals are not bad, only need lower capacitors, 15pF works fine]]>
http://www.electro-tech-online.com/micro...m-icd.html

Conclusion:

The crystals are not bad, only need lower capacitors, 15pF works fine]]>