ISU Audio & Arduino Clubs
Battery Checker – Bill of Materials
- Kits are available from IEEE — contact the current IEEE representative, listed on the About page.
- The BoM includes everything needed to make the battery-checker PCB. To complete the project and use the meter you will also need a nine-volt battery and connector with barrel-jack connector.
| item | Manufacturer p/n | Digikey p/n | quantity | item cost | total |
|---|---|---|---|---|---|
| Microcontroller | Microchip ATMEGA328P-PU | ATMEGA328P-PU-ND | 1 | 2.89 | 2.89 |
| Socket | On Shore ED281DT | ED3050-5-ND | 1 | 0.35 | 0.35 |
| 16-MHz crystal | ECS, Inc. ECS-160-20-46X | XC1759-ND | 1 | 0.37 | 0.37 |
| 22-pF capacitors | Vishay K220J15C0GF5TL2 | BC1005CT-ND | 2 | 0.23 | 0.46 |
| 10-kΩ resistors | Stackpole CF14JT10K0 | CF14JT10K0CT-ND | 3 | 0.10 | 0.30 |
| ICSP header | Sullins PEC03DAAN | S2012E-03-ND | 1 | 0.47 | 0.47 |
| 0.1-uF capacitors | Vishay K104K15X7RF5TL2 | BC1084CT-ND | 3 | 0.25 | 0.75 |
| 5-V regulator | STMicro L7805CV | 497-1443-5-ND | 1 | 0.50 | 0.50 |
| 0.33-uF capacitors | Murata RCER71H334K1DBH03A | 490-7543-1-ND | 1 | 0.52 | 0.52 |
| barrel jack | CUI PJ-102AH | CP-102AH-ND | 1 | 0.76 | 0.76 |
| 1-kΩ resistor | Stackpole CF14JT1K00 | CF14JT1K00CT-ND | 1 | 0.10 | 0.10 |
| red LED | Lite-On LTL-4211 | 160-195-ND | 1 | 0.19 | 0.19 |
| OLED display | Hosyond (from Amazon) | Amazon | 1 | 3.00 | 3.00 | screw - 2-56 x 3/8 | Essentra 010256F037 | RPC7524-ND | 4 | 0.11 | 0.44 |
| nut - 2/56 | Essentra 0400256HN | RPC7088-ND | 4 | 0.15 | 0.60 |
| stand off - 2/56 | Bivar 9913-125 | 492-1042-ND | 4 | 0.10 | 0.40 |
| bumpers | Bump Spec B25BL07X30RP | 2042-1053-ND | 4 | 0.05 | 0.20 |
| AA battery holder | Keystone 2460 | 36-2460-ND | 1 | 1.23 | 1.23 |
| AAA battery holder | Keystone 2466 | 36-2466-ND | 1 | 0.92 | 0.92 |
| 2-pos screw terminal | On Shore OSTVN02A150 | ED10561-ND | 1 | 0.87 | 0.87 |
| 9-V battery strap | Keystone 84-4 | 36-84-4-ND | 1 | 0.68 | 0.68 |
| momentary switch | Omron B3F-1000 | SW400-ND | 2 | 0.24 | 0.48 |
| 100-kΩ resistor (5%) | Stackpole CF14JT100K | CF14JT100KCT-ND | 1 | 0.10 | 0.10 |
| 15-Ω resistor (5%) | Stackpole CF14JT15R0 | CF14JT15R0CT-ND | 1 | 0.10 | 0.10 |
| 82-Ω resistor (5%) | Stackpole CF14JT82R0 | CF14JT82R0CT-ND | 1 | 0.10 | 0.10 | 10-kΩ resistor (1%) | Yageo MFR-25FBF52-10K | 10.0KXBK-ND | 1 | 0.10 | 0.10 |
| 22-kΩ resistor (1%) | Yageo MFR-25FBF52-22K | MFR-25FBF52-22K-ND | 1 | 0.10 | 0.10 |
| PCB | from IEEE | 1 | 2.00 | 2.00 | |
| Total | 19.28 | ||||