From 11afa8ab55f3ab5add2b3deb0bc25d0d248dcbcf Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Thu, 20 Jun 2013 23:06:20 -0700 Subject: [PATCH] Replace the regulator with a 3.0V LD2980. Reduce igniter shut-off gap Switching to a 3.0V regulator and reducing the igniter shut-off gap both serve to let the board run on significantly lower battery voltage, down from 3.9V to 3.4V. The LD2980 doesn't have a bypass pin, so the 470pF cap was removed. Signed-off-by: Keith Packard --- easymini.pcb | 22 +++++++--------------- easymini.sch | 43 ++++++++++++++----------------------------- 2 files changed, 21 insertions(+), 44 deletions(-) diff --git a/easymini.pcb b/easymini.pcb index 8f4cbdf..ee07a12 100644 --- a/easymini.pcb +++ b/easymini.pcb @@ -1153,7 +1153,7 @@ Element["" "0402" "R12" "100k" 425.00mil 5.0104mm 25.00mil -0.7940mm 0 100 ""] ) -Element["" "powerdi123" "D1" "DFLS130L" 182.99mil 490.00mil -90.99mil 30.00mil 2 100 ""] +Element["" "powerdi123" "D1" "DFLS130L" 182.99mil 490.00mil -142.99mil -32.00mil 0 100 ""] ( Pad[21.65mil 0.0000 53.15mil 0.0000 55.12mil 23.62mil 66.93mil "cathode" "2" "square,edge2"] Pad[-62.99mil -9.84mil -62.99mil 9.84mil 35.43mil 23.62mil 47.24mil "anode" "1" "square"] @@ -1167,7 +1167,7 @@ Element["" "powerdi123" "D1" "DFLS130L" 182.99mil 490.00mil -90.99mil 30.00mil 2 ) -Element["" "1210" "C8" "47uF" 167.00mil 359.95mil 71.00mil 100.95mil 1 100 ""] +Element["" "1210" "C8" "47uF" 167.00mil 359.95mil -119.90mil -88.95mil 0 100 ""] ( Pad[-27.55mil -59.05mil 27.55mil -59.05mil 51.18mil 20.00mil 57.18mil "1" "1" "square"] Pad[-27.55mil 59.05mil 27.55mil 59.05mil 51.18mil 20.00mil 57.18mil "2" "2" "square"] @@ -1264,13 +1264,6 @@ Element["" "ABM8" "X1" "12MHz" 18.2556mm 145.59mil -2.3956mm -3.0192mm 0 100 ""] ) -Element["" "0402" "C5" "470pF" 9.7094mm 754.00mil 3.2700mm -20.00mil 0 100 ""] -( - Pad[15.74mil -3.93mil 15.74mil 3.93mil 19.68mil 20.00mil 25.68mil "1" "1" "square"] - Pad[-15.74mil -3.93mil -15.74mil 3.93mil 19.68mil 20.00mil 25.68mil "2" "2" "square"] - - ) - Element["" "0402" "R14" "10k" 278.00mil 738.26mil 22.00mil -3.0800mm 3 100 ""] ( Pad[-3.93mil 15.74mil 3.93mil 15.74mil 19.68mil 20.00mil 25.68mil "1" "1" "square"] @@ -1278,14 +1271,14 @@ Element["" "0402" "R14" "10k" 278.00mil 738.26mil 22.00mil -3.0800mm 3 100 ""] ) -Element["" "0402" "R15" "6.81k" 8.1468mm 754.00mil 2.3434mm -20.00mil 0 100 ""] +Element["" "0402" "R15" "7.5k" 8.1468mm 754.00mil 0.9718mm -19.00mil 0 100 ""] ( Pad[15.74mil -3.93mil 15.74mil 3.93mil 19.68mil 20.00mil 25.68mil "1" "1" "square"] Pad[-15.74mil -3.93mil -15.74mil 3.93mil 19.68mil 20.00mil 25.68mil "2" "2" "square"] ) -Element["" "SOT23-5" "U2" "MIC5205" 407.00mil 715.00mil -120.00mil -153.00mil 0 89 ""] +Element["" "SOT23-5" "U2" "LD2980" 407.00mil 715.00mil -120.00mil -153.00mil 0 89 ""] ( Attribute("author" "DJ Delorie") Attribute("copyright" "2006 DJ Delorie") @@ -1556,16 +1549,12 @@ Layer(1 "top") Line[278.00mil 18.3520mm 278.00mil 658.00mil 10.00mil 12.00mil "clearline"] Line[278.00mil 658.00mil 299.00mil 637.00mil 10.00mil 12.00mil "clearline"] Line[299.00mil 637.00mil 325.00mil 637.00mil 10.00mil 12.00mil "clearline"] - Line[336.48mil 754.00mil 366.52mil 754.00mil 10.00mil 12.00mil "clearline"] - Line[407.00mil 715.00mil 407.00mil 745.00mil 10.00mil 12.00mil "clearline"] - Line[407.00mil 745.00mil 398.00mil 754.00mil 10.00mil 12.00mil "clearline"] Line[397.00mil 598.00mil 397.00mil 627.00mil 10.00mil 12.00mil "clearline"] Line[397.00mil 627.00mil 407.00mil 637.00mil 10.00mil 12.00mil "clearline"] Line[305.00mil 754.00mil 249.00mil 754.00mil 10.00mil 12.00mil "clearline"] Line[325.00mil 676.00mil 361.00mil 676.00mil 25.00mil 20.00mil "clearline"] Line[365.52mil 591.00mil 365.52mil 671.48mil 10.00mil 12.00mil "clearline"] Line[365.52mil 671.48mil 361.00mil 676.00mil 10.00mil 12.00mil "clearline"] - Line[367.00mil 754.00mil 367.00mil 682.00mil 10.00mil 12.00mil "clearline"] Line[367.00mil 682.00mil 361.00mil 676.00mil 10.00mil 12.00mil "clearline"] Line[325.00mil 637.00mil 305.00mil 637.00mil 25.00mil 20.00mil "clearline"] Line[22.8655mm 148.99mil 964.01mil 148.99mil 10.00mil 12.00mil "clearline"] @@ -1662,6 +1651,9 @@ Layer(1 "top") Line[787.00mil 532.00mil 717.00mil 462.00mil 10.00mil 12.00mil "clearline"] Line[886.00mil 559.00mil 825.00mil 559.00mil 10.00mil 12.00mil "clearline"] Line[825.00mil 559.00mil 789.00mil 595.00mil 10.00mil 12.00mil "clearline"] + Line[366.00mil 676.00mil 366.00mil 737.00mil 10.00mil 12.00mil "clearline"] + Line[366.00mil 737.00mil 349.00mil 754.00mil 10.00mil 12.00mil "clearline"] + Line[349.00mil 754.00mil 8.5466mm 754.00mil 10.00mil 12.00mil "clearline"] ) Layer(2 "bottom") ( diff --git a/easymini.sch b/easymini.sch index 829ff5a..9aa9b8a 100644 --- a/easymini.sch +++ b/easymini.sch @@ -567,25 +567,6 @@ refdes=C8 T 13800 11700 5 10 1 1 180 0 1 value=47uF } -C 16000 12200 1 270 0 capacitor.sym -{ -T 16700 12000 5 10 0 0 270 0 1 -device=CAPACITOR -T 16000 12200 5 10 0 0 270 0 1 -vendor_part_number=311-1028-1-ND -T 16000 12200 5 10 0 0 270 0 1 -footprint=0402 -T 16000 12200 5 10 0 0 270 0 1 -vendor=digikey -T 16300 11900 5 10 1 1 0 0 1 -refdes=C5 -T 16300 11400 5 10 1 1 0 0 1 -value=470pF -T 16000 12200 5 10 0 1 0 0 1 -loadstatus=smt -T 16000 12200 5 10 0 1 0 0 1 -symversion=0.1 -} C 13800 11700 1 0 0 TC2185.sym { T 14395 12395 5 10 0 1 0 0 1 @@ -595,16 +576,15 @@ footprint=SOT23-5 T 13800 11700 5 10 0 0 0 0 1 vendor=digikey T 13800 11700 5 10 0 0 0 0 1 -vendor_part_number=576-1259-1-ND +vendor_part_number=497-1516-1-ND T 13800 11700 5 10 0 0 0 0 1 loadstatus=smt T 14095 12895 5 10 1 1 0 0 1 refdes=U2 T 14900 12900 5 10 1 1 0 0 1 -value=MIC5205 +value=LD2980 } C 14800 10950 1 0 0 gnd.sym -N 15900 12200 16200 12200 4 T 26850 11900 9 40 1 0 0 0 1 EasyMini N 21500 22500 20500 22500 4 @@ -1110,7 +1090,7 @@ T 24500 23100 5 10 1 1 180 0 1 refdes=R17 T 24100 22600 5 10 1 1 0 0 1 value=8.45k -T 24800 22400 5 10 1 1 0 0 1 +T 24800 22400 5 10 0 1 0 0 1 vendor_part_number=P8.45KLCT-ND } C 24800 23300 1 90 0 resistor.sym @@ -1127,7 +1107,7 @@ T 24500 24000 5 10 1 1 180 0 1 refdes=R16 T 24200 23500 5 10 1 1 0 0 1 value=10k -T 24800 23300 5 10 1 1 0 0 1 +T 24800 23300 5 10 0 1 0 0 1 vendor_part_number=P10.0KLCT-ND } C 24000 23900 1 90 0 resistor.sym @@ -1143,9 +1123,9 @@ loadstatus=smt T 23700 24600 5 10 1 1 180 0 1 refdes=R15 T 23300 24100 5 10 1 1 0 0 1 -value=6.81k -T 24000 23900 5 10 1 1 0 0 1 -vendor_part_number=P6.81KLCT-ND +value=7.5k +T 24000 23900 5 10 0 1 0 0 1 +vendor_part_number=P7.50KLCT-ND } C 24000 24800 1 90 0 resistor.sym { @@ -1161,8 +1141,6 @@ T 23700 25500 5 10 1 1 180 0 1 refdes=R14 T 23400 25000 5 10 1 1 0 0 1 value=10k -T 24000 24800 5 10 1 1 0 0 1 -vendor_part_number=P10.0KLCT-ND } C 24500 24200 1 0 0 3.3V-plus.sym C 24600 22100 1 0 0 gnd.sym @@ -1223,3 +1201,10 @@ N 14500 15100 14500 15500 4 N 14500 15500 17500 15500 4 N 17500 15500 17500 15100 4 C 17400 14100 1 0 0 gnd.sym +C 15900 12100 1 0 0 nc-right.sym +{ +T 16000 12600 5 10 0 0 0 0 1 +value=NoConnection +T 16000 12800 5 10 0 0 0 0 1 +device=DRC_Directive +} -- 2.30.2